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Workshop eZ Publish Caching Mechanisms

The document discusses caching mechanisms in eZ Publish including template compilation, INI caching, view caching, cache blocks, and PHP caching. It provides examples of how to compile templates from text files, use dynamic settings with shared compiled templates, log viewcache activity, expire specific cache blocks and the entire viewcache, and generate a PHP-based cache file. The document also addresses questions around caching and explores caching mechanisms in more detail.

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eZ Summer Camp. Setp 2012 eZ Publish Caching Mechanisms // WORKSHOP Gilles Guirand - CTO Kaliop / eZ Publish board member @gandbox Gilles Ballini – Lead engineer Kaliop Stephane Sobecki - Lead engineer Kaliop Jerome Lecocq - Lead engineer Kaliop
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA (1) TEMPLATE COMPILATION Concept / exploring the VAR Ex : HOWTO compile a set of template from a TXT file list INI CACHE Concept / exploring the VAR Ex : HOWTO use dynamic settings with shared compiled templates VIEWCACHE Concept / exploring the VAR Ex : HOWTO log the viewcache activity 2 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA ( 2 ) CACHE-BLOCK Concept / exploring the VAR Ex : HOWTO expire a named cache-block, related to the homepage expiry, or a contentclass, or whatever else Ex : HOWTO expire a set of cache-block using a shell script Ex : HOWTO build the perfect pagelayout EXPIRY.PHP FILE Concept / exploring the VAR EZCACHE.PHP SCRIPT Concept / exploring the VAR Ex : HOWTO create a custom ezcache.php --id=myid PHP CACHE Ex : HOWTO generate a PHP based cache file 3 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CONTEXT Common questions : ➔Is it possible to never expire the ENTIRE viewcache ? … and which actions actually expire the ENTIRE viewcache ? ➔ Is it possible to reduce the I/O (template-blocks) ? ➔ Is it possible to expire a specific set ot template-block files ? ➔ Is it possible to develop a better pagelayout.tpl ? ➔ Is something to improve on high-trafic websites ? Or Websites factory ( 100 siteaccess... ) 4 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CONTEXT Final questions : ➔ How all these cache mechanisms really work ? … I mean in details... algorithms, I/O, triggers, exceptions, undocumented features & settings, unknown bugs, unknown fixes... and ezfs, ezfs2, ezdfs, ezdb... Final solutions : ➔ READ THE KERNEL / TEST THE KERNEL... ( be brave ) 5 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VM PREPARATION Copy cache & cache2 extension folders Activate extension (site.ini.append.php) Generate autoloads Clear the cache-all Add user / login policy for anomymous ( site access cache & cache 2 ) 6 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION Concept / exploring the VAR Ex : HOWTO compile a set of template from a TXT file list INI CACHE VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE 7 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS TPL COMPILATION What for ? ➔ Compile your .tpl files to .php files ➔ Reduce the RAM / CPU (use the stored compiled version) How to set ? site.ini [templatesettings] ➔ TemplateCompile=enabled ➔ Store compiled version {varDir}/cache/template/compiled/ ➔ NodeTreeCaching=enabled ( disabled by default ) ➔ Store pre-compiled version {varDir}/cache/template/tree/ Common mistake ➔ TemplateCache=enabled → template-block 8 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS TPL COMPILATION DESIGN {varDir}/cache/template/tree {varDir}/cache/template/compiled page_mainarea.tpl {hash}-page_mainarea.php page_mainarea-{hash1}.php NodeTreeCaching=enabled page_mainarea-{hash2}.php ( disabled by default ) page_mainarea-{hash3}.php Why eZ generates several compiled files for the same .tpl? 9 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS TPL COMPILATION How eZ stores the final compiled files ? {VarDir}/cache/template/compiled/, not clusterized Filenames : {templatename}-{hash}.php page_head-49f4458d0b68aec3cf2de63a6918fd61.php page_head-ec3cf2de63a6918fd6149f4458d0b68a.php 10 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS TPL COMPILATION How eZ calculates the hash ? $sharedTemplates = false {VarDir}/cache/template/compiled/ Filenames : {templatename}-{hash}.php pagelayout-49f4458d0b68aec3cf2de63a6918fd61.php Md5( filepath ) / internalCharset / language / useFullUrlText / accessText / pageLayoutVariable / indexFile / extraName /layout/set/... 11 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS TPL COMPILATION How eZ calculate the hash ? $sharedTemplates = true {VarDir}/cache/template/compiled/ Filenames : {templatename}-{hash}.php pagelayout-aec3cf2de63a6918fd6149f4458d0b68.php Md5( filepath ) / language No more siteaccess inside the key... Ezini operator → 'dynamic' parameter 12 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXERCISE How to pre-compile a set of template files (to avoid : on the fly generating) ? ➔ Force the compilation of 2 template files php bin/php/eztc.php -s mysiteaccess --force extension/ezdemo/design/ezdemo/templates/page_head.tpl extension/ezdemo/design/ezdemo/templates/pagelayout.tpl ➔ Force the compilation of all template files starting with « page » : find extension/ezdemo/ -name "page_*.tpl" | xargs php bin/php/eztc.php -s eng --force ➔ Force the compilation of all template files from a TXT file : cat templates.txt | xargs php bin/php/eztc.php -s eng --force 13 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS TPL COMPILATION The **** layout module ➔ By default ( $shareTemplates = false ), the 'layout' value is used by the final compiled filename ➔ So if you are using this module with 3 other layouts, you'll produce 4 compiled files (instead of 1) ➔ eztc.php script does not manage the layout parameter Your 3 additional compiled files ( for each layout ) will be procude « on the fly », and cannot be pre-compiled with eztc.php ➔ Suggestion : improve eztc.php, add the –layout=... parameter 14 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE Concept / exploring the VAR Ex : HOWTO use dynamic settings with shared compiled templates VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE 15 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS INI CACHE When eZ generates the INI cache ? ➔ On the fly (if the cache file does not exist) – from an API call (ezini PHP class), a template call (ezini operator) ➔ By default, eZ automatically check if an INI file has been changed or not, depending of this setting (config.php) //define( 'EZP_INI_FILEMTIME_CHECK', false ) ; /* Set EZP_INI_FILEMTIME_CHECK constant to false to improve performance ( 10% ~ 15% on I/O ) by not checking modified time on ini files. You can also set it to a string, the name of a ini file you still want to check modified time on, best example would be to set it to 'site.ini' to make the system still check that but not the rest. */ 16 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS INI CACHE How eZ stores the INI cache ? ➔ var/cache/ini ( and not /{varDir}/ini ), not clusterized ➔ {inifilename}-{hash}.php design-677247a49e428aa0837411b52777b920.php design-704216b4d0e3ea68c09742504bb366c8.php design-7333039e7e19aa411f8dd01836555861.php md5 FileName / RootDir / DirectAccess / overrideDirs / internalCharset 17 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS INI CACHE How to expire the INI cache ? ➔php bin/php/ezcache.php --clear-id=global_ini ➔ Remove var/cache/ini ➔php bin/php/ezcache.php --clear-tag=ini ➔ Remove var/cache/ini & var/cache/active_extensions_{hash}.php ➔php bin/php/ezcache.php --clear-id=ini ➔ Nothing (bug) : try to recursively delete INI files in {varDir}/ini 18 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS INI CACHE How to not compile the INI value ? lib/ezutils/classes/ezini.php function eZINI( $fileName = 'site.ini', $rootDir = '', $useTextCodec = null, $useCache = null, $useLocalOverrides = null, $directAccess = false, $addArrayDefinition = false, $load = true ) { ... } Dynamically load the INI values inside your compiled templates : site.ini [eZINISettings] / DynamicTemplateMode=enabled OR Ezini operator → 'dynamic' parameter 19 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXERCISE HOWTO use dynamic settings with shared compiled templates 20 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE Concept / exploring the VAR Ex : HOWTO log the viewcache activity CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE 21 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE What for ? ➔ Viewcache = content cache, content viewcache, … ➔ Viewcache is an HTML (or other) cache of the $module_result.content outpout, for a node view call ( content/view/... ) ← Illustration : Łukasz Serwatka http://share.ez.no/learn/ez-publish/ez-publish-performance-optimization- part-3-of-3-practical-cache-and-template-solutions/(page)/2 22 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE How eZ stores the viewcache ? {VarDir}/cache/content/{siteaccess}/{number}/{number}/{number} {VarDir}/cache/content/{siteaccess}/ 2-ce182234bd70236c6a009578d2a34632.cache 20-ce182234bd70236c6a009578d2a34632.cache {VarDir}/cache/content/{siteaccess}/1 101-ce182234bd70236c6a009578d2a34632.cache 105-ce182234bd70236c6a009578d2a34632.cache {VarDir}/cache/content/{siteaccess}/5/2/1 52101-ce182234bd70236c6a009578d2a34632.cache 52144-ce182234bd70236c6a009578d2a34632.cache 23 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE How eZ stores the viewcache ? {nodeid}-{hash}.php 2-ce182234bd70236c6a009578d2a34632.cache md5 required nodeID / viewMode / layout / language (view.p.) / offset (view.p.) / indexFile optionnal + roIeIDList / limitValueList / discountList / cacheNameExtra / pr_user / viewParameters / userPreferences ViewCacheTweaks[<node_id>]=<setting>[;<setting2>] ViewCacheTweaks[global]=<setting>[;<setting2>] 24 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE How to know the exact matching between a viewcache file & my URLs ? {nodeid}-{hash}.php → deduce the nodeID At the end of file : "view_parameters";a:6: {s:6:"offset";b:0;s:4:"year";b:0;s:5:"month";b:0;s:3:"day";b:0;s:10:"na mefilter";b:0;s:4:"test";s:1:"2";}... Should be URL : /(test)/2 25 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE How eZ expires a set of viewcache ? Alteration of cache states - Depending of the filehandler ( file.ini ) ➔ Ezfsfilehandler : UNLINK file ➔ Ezfs2filehandler : TOUCH file (25/25/1977) ← Star Wars day ➔ Ezdbfilehandler : "ezdbfile" (UPDATE expired=1) ➔ Ezdfsfilehandler : "ezdfsfile" (UPDATE expired=1) Comparison of cache states - Depending of the filehandler ( file.ini ) ➔ Ezfsfilehandler : file does not exist, or is older than the content-view-cache timestamp ➔ Ezfs2filehandler : file is older than the content-view-cache timestamp ➔ Ezdbfilehandler : "ezdbfile" (expired=1) ➔ Ezdfsfilehandler : "ezdfsfile" (expired=1) 26 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE How eZ expires the ENTIRE viewcache ? ➔ eZ does not recursively update / delete the files (too many files... unsafe) eZ set a global timestamp expiry value : ➔ {VarDir}/cache/expiry.php ← 'content-view-cache' ( current timestamp) Each time the expiry.php is updated, the ENTIRE viewcache will expire. ➔ Ok, but my ENTIRE viewcache expires all the time... i did nothing special ! Don't know why ! 27 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE Which event / trigger expires a set of cache ? By default : on object publication (or back-end feature) ➔ the related nodes & parent node Willingly, using a script : ➔ bin/php/ezcontentcache.php –clear-node=2 ➔ bin/php/ezcontentcache.php –clear-node=2,46,63 ➔ bin/php/ezcontentcache.php –clear-node=/company/about ➔ bin/php/ezcontentcache.php –clear-subtree=/company/about ➔ bin/php/ezcontentcache.php –clear-subtree=/company/about,/news 28 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE Smart viewcache & cacheThreshold : a set of cache → the ENTIRE view cache Automatically, if using the smart view cache / viewcache.ini : ➔ The smart view cache populates a list of related « node_id » viewcache files to expire, depending of your settings. If this node_id list is larger than the CacheThreshold limit value (250 by default) → eZ expires the ENTIRE viewcache ! ➔ Some settings could increase the node_id list count & excede the CacheThreshold limit : ALL, siblings, KeywordNodesCacheClearLimit ➔ Advice : Set KeywordNodesCacheClearLimit = 0, never use ALL, avoid siblings, log out the CacheThreshold (ezpEvent) 29 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXERCISE How to log the viewcache activity ? & prevent the CacheThreshold limit... Add an ezpEvent : site.ini.append.php [Event] Listeners[]=content/cache@log::logviewcache # log = your PHP class name # logviewcache = the static method 30 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXERCISE Log the viewcache node_id list to expire, prevent the CacheThreshold limit... ➔ Create a PHP class / generate autoloads // extension/extension-name/classes/log.php <?php class log { static public function logviewcache( $nodeList ) { $uri = $GLOBALS['_SERVER']['REQUEST_URI']; eZLog::write('node_id count : '. count( $nodeList ). ' / node_id list : ' . implode(', ', $nodeList ) . ' / URI : '.$uri, 'cachethresold.log'); return $nodeList; }} ?> ➔ Generate autoloads : php bin/php/ezpgenerateautolaods.php 31 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXERCISE Log the viewcache node_id list to expire, prevent the CacheThreshold limit... ● Edit / publish contents in the administration backend ➔ Log output : var/log/cachethreshold.log [ Sep 03 2012 17:37:33 ] node_id count : 14 / node_id list : 74, 73, 75, 76, 79, 80, 81, 84, 85, 78, 77, 82, 72, 100 / URI : /administration/content/edit/72/2/eng-GB [ Sep 05 2012 13:44:54 ] node_id count : 7 / node_id list : 89, 88, 90, 91, 2, 1, 87 / URI : /administration/content/edit/87/2/eng-GB [ Sep 05 2012 13:45:34 ] node_id count : 2 / node_id list : 2, 1 / URI : /administration/content/edit/57/2/eng-GB 32 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXERCISE Log the viewcache node_id list to expire, prevent the CacheThreshold limit... ● Edit / publish contents in the administration backend ➔ Log output : var/log/cachethreshold.log [ Sep 03 2012 17:37:33 ] node_id count : 14 / node_id list : 74, 73, 75, 76, 79, 80, 81, 84, 85, 78, 77, 82, 72, 100 / URI : /administration/content/edit/72/2/eng-GB [ Sep 05 2012 13:44:54 ] node_id count : 7 / node_id list : 89, 88, 90, 91, 2, 1, 87 / URI : /administration/content/edit/87/2/eng-GB [ Sep 05 2012 13:45:34 ] node_id count : 2 / node_id list : 2, 1 / URI : /administration/content/edit/57/2/eng-GB 33 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS VIEWCACHE My ENTIRE viewcache still expire... Maybe you invoked one of these features (back-end, API)  : ➔ Create a new content class ( BUG ? ) ➔ Update / delete an existing content class ( or attributes ) ➔ Update / delete and existing role ( & policies ) OR role assignement ➔ Section assignement ➔ Update an ezshop rule ( discount rules, currency... ) 34 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS 35 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS 36 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE CACHE-BLOCK Concept / exploring the VAR Ex : HOWTO expire a named cache-block, related to the homepage expiry, or a contentclass, or whatever else Ex : HOWTO expire a set of cache-block using a shell script Ex : HOWTO build the perfect pagelayout EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE 37 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK ... What for ? ➔ Template-block cache = cache files related to cache-block, also called « template cache » ( common mistake with the template compilation ) ➔ Template-block cache is an HTML (or other) cache of a template part ( cache-block ) ← Illustration : Łukasz Serwatka http://share.ez.no/learn/ez-publish/ez-publish-performance-optimization- part-3-of-3-practical-cache-and-template-solutions/(page)/2 38 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « keys » parameter : Please AVOID : {cache-block keys=$uri_string} 1 template-block file for ... each URI !!! {/cache-block} Use instead : {cache-block keys=$my_custom_limited_range_key} ... {/cache-block} Only possible states of your content inside your block 39 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « URI key » parameter : stupid but signifiant simulation ➔ A classic Web site, with 1000 nodes, news folder ( year, month archives ), products catalog ( filters ), calendar, forum... ➔ Could generate 10 000 « indexable » several URI ( google bot ) ➔ A cache-block ( only 1 URI key ) to cache the global menu, who is generating 300 SQL queries ➔ No « expiry » or « ignore_content_expiry » parameters : so the cache-block expires every 2 hours (or on content publication) ➔ So... 300 SQL queries * 12 expiration per day * 10 000 URI = 36 millions of SQL queries per day... 40 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « expiry » parameter : If possible, always set a custom expiry value & ignore content expiry : {cache-block ignore_content_expiry expiry=86400} ... {/cache-block} 41 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « sutree_expiry » parameter : no more expiry / ignore_content_expiry needed {cache-block subtree_expiry='news/'} ... {/cache-block} {cache-block subtree_expiry=142} ... {/cache-block} 42 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « sutree_expiry » parameter : tip of the « magic » node ➔ To expire a cache-block, depending of a custom rule ( per content class, per PHP algorithm ... ) ➔ Create a {cache-block subtree_expiry=$magic_node_id} ➔ Create a node somewhere ( safe location, without FULL view ) ➔ Create a workflow or customedithandler to include your custom rules on publication, and update the content object related to the magic node by the code 43 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK Cache-block imbrication {cache-block expiry=3600} ... {cache-block ignore_content_expiry expiry=86400} ... {* you save … SQL Queries each hours *} {/cache-block} ... {cache-block subtree_expiry='news/'} ... {/cache-block} ... {/cache-block} 44 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK I need a « real time » block ( TTL=1m ) A cache-block may not be the solution, use instead : ➔ ESI ( Edge Side Include ) : better for front-end loading & google bot indexing. But reverse-proxy required ( varnish, squid, akamai... ) ➔ AJAX : easier to implement 45 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK How eZ stores the template-block cache {VarDir}/cache/template-block/1/2/3/12345678.cache {VarDir}/cache/template-block/5/5/5/555666888.cache {VarDir}/cache/template-block/subtree/1/5/9/cache/1/2/3/12345678.cache subtree_expiry=159 CRC32 Complex... The pathname doesn't help 46 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK How eZ stores the template-block cache {VarDir}/cache/template-block/1/2/3/12345678.cache CRC32 ( 32-bit polynomial checksum ) Cache-block position in the .tpl file / template path / keys / siteaccess 78_1_78_94_extension/ezwebin/design/ezwebin/templates/pagelayout.tpl 78 = {cache-block... } line start 1 = {cache-block... } column start (a simple ' ' before...) 78 = {cache-block... } line end 94 = {cache-block... } column end 47 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK How to expire the ALL of the template- block cache files ? php bin/php/ezcache.php –clear-id=template-block ➔ Expires all the template-block files, by updating the global cache-block expiry time ( global-template-block-cache ) in the {varDir}/expiry.php file 48 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK How to expire a set of specific template- block cache files ? ➔ Not really possible... exept by searching a specific string inside each files, and deleting matching files ( ezfs / ezFS2 ) ➔ find var/ezdemo_site/cache/template-block/ -name "*.cache" -exec grep -iHl "string-to-search" {} ; -delete {cache-block ignore_content_expiry expiry=0} <!-- string-to-search --> ... {/cache-block} 49 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS CACHE-BLOCK PULL REQUEST IDEA : {cache-block id=myfolder ignore_content_expiry expiry=0} <!-- ID:BLOCK1 --> ... {/cache-block} {VarDir}/cache/template-block/myfolder/1/2/3/12345678.cache So... to expire your cache-block : mv myfolder myfolder-to-remove nice -n 20 rm -r myfolder-to-remove 50 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXERCISE Ex : HOWTO expire a named cache-block, related to the homepage expiry, or a contentclass, or whatever else Ex : HOWTO expire a set of cache-block using a shell script Ex : HOWTO build the perfect pagelayout 51 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE (not so) funny quiz EZCACHE.PHP SCRIPT PHP CACHE 52 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXPIRY.PHP FILE <?php $Timestamps = array ( What for ? 'state-limitations' => 1321010927, 'user-info-cache' => 1323788789, 'content-view-cache' => 1326299075, 'class-identifier-cache' => 1326298969, 'global-template-block-cache' => 1325856140, 'content-tree-menu' => 1326298969, 'image-manager-alias' => 1323788788, 'active-extensions-cache' => 1325668728, 'ts-translation-cache' => 1323788789, 'content-complex-viewmode-cache' => 1325780763, 'template-block-cache' => 1326298969, 'user-class-cache' => 1326298969, 'sort-key-cache' => 1326298969, ); 53 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT Concept / exploring the VAR Ex : HOWTO create a custom ezcache.php --id=myid PHP CACHE 54 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT FAMOUS EZSCRIPT php bin/php/ezcache.php --clear-id=[ID] php bin/php/ezcache.php --clear-id=[ID] --purge php bin/php/ezcache.php --clear-tag=[TAG] php bin/php/ezcache.php --clear-tag=[TAG] --purge php bin/php/ezcache.php --clear-all php bin/php/ezcache.php --clear-all --purge NEED SOME HELP Does it do something php bin/php/ezcache.php --help special ? php bin/php/ezcache.php --list-ids Superstitious parameter php bin/php/ezcache.php --list-tags 55 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT TAG ID content content / classid / sortey / urlalias / rss_cache / content_tree_menu / state_limiations / template-block / ezjscore-packer template template / template-block / template-override / texttoimage / design_base / ezjscore-packer ini ini / global_ini / active_extensions user user_info_cache I18n translation / chartrans codepage codepage image imagealias rest rest / rest-routes 56 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT MAIN ALGORITHM Hardcoded in kernel/classes/ezcache.php. For each ID : 'id' => ID 'tag' => array( TAG LIST ) 'enabled' => Cache enabled or not 'is-clustered' => Use the current filehandler or not ? 'path' => Path to purge, if purging (is-clustered=false) 'expiry-key' => Key to set inside the expiry.php file if needed 'function' => Function to apply only on clearing (not purging) 'function-purge' => Function to apply only on purging (not clearing) 57 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT MAIN ALGORITHM Add your own ID for your extensions ( site.ini.append.php ) # Cache item entry (for eZ Publish 4.3 and up) [Cache] CacheItems[]=ezjscore [Cache_ezjscore] name=eZJSCore Public Packer cache id=ezjscore-packer tags[]=content tags[]=template path=public isClustered=true 58 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EXERCISE How to create a custom ID cache expiration  ? Use the ezbashcompletion extension : https://github.com/bdunogier/ezbashcompl etion 59 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT A BUG HELPS TO UNDERSTAND php bin/php/ezcache.php --clear-id=ini array( 'name' => ezpI18n::tr( 'kernel/cache', 'INI cache' ), 'id' => 'ini', 'tag' => array( 'ini' ), 'enabled' => true, 'path' => 'ini' ), Why is it not working ? 60 / 61
:~$ eZ Publish Caching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE Ex : HOWTO generate a PHP based cache file 61 / 61

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Workshop eZ Publish Caching Mechanisms

  • 1.
    eZ Summer Camp.Setp 2012 eZ Publish Caching Mechanisms // WORKSHOP Gilles Guirand - CTO Kaliop / eZ Publish board member @gandbox Gilles Ballini – Lead engineer Kaliop Stephane Sobecki - Lead engineer Kaliop Jerome Lecocq - Lead engineer Kaliop
  • 2.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA (1) TEMPLATE COMPILATION Concept / exploring the VAR Ex : HOWTO compile a set of template from a TXT file list INI CACHE Concept / exploring the VAR Ex : HOWTO use dynamic settings with shared compiled templates VIEWCACHE Concept / exploring the VAR Ex : HOWTO log the viewcache activity 2 / 61
  • 3.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA ( 2 ) CACHE-BLOCK Concept / exploring the VAR Ex : HOWTO expire a named cache-block, related to the homepage expiry, or a contentclass, or whatever else Ex : HOWTO expire a set of cache-block using a shell script Ex : HOWTO build the perfect pagelayout EXPIRY.PHP FILE Concept / exploring the VAR EZCACHE.PHP SCRIPT Concept / exploring the VAR Ex : HOWTO create a custom ezcache.php --id=myid PHP CACHE Ex : HOWTO generate a PHP based cache file 3 / 61
  • 4.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CONTEXT Common questions : ➔Is it possible to never expire the ENTIRE viewcache ? … and which actions actually expire the ENTIRE viewcache ? ➔ Is it possible to reduce the I/O (template-blocks) ? ➔ Is it possible to expire a specific set ot template-block files ? ➔ Is it possible to develop a better pagelayout.tpl ? ➔ Is something to improve on high-trafic websites ? Or Websites factory ( 100 siteaccess... ) 4 / 61
  • 5.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CONTEXT Final questions : ➔ How all these cache mechanisms really work ? … I mean in details... algorithms, I/O, triggers, exceptions, undocumented features & settings, unknown bugs, unknown fixes... and ezfs, ezfs2, ezdfs, ezdb... Final solutions : ➔ READ THE KERNEL / TEST THE KERNEL... ( be brave ) 5 / 61
  • 6.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VM PREPARATION Copy cache & cache2 extension folders Activate extension (site.ini.append.php) Generate autoloads Clear the cache-all Add user / login policy for anomymous ( site access cache & cache 2 ) 6 / 61
  • 7.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION Concept / exploring the VAR Ex : HOWTO compile a set of template from a TXT file list INI CACHE VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE 7 / 61
  • 8.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS TPL COMPILATION What for ? ➔ Compile your .tpl files to .php files ➔ Reduce the RAM / CPU (use the stored compiled version) How to set ? site.ini [templatesettings] ➔ TemplateCompile=enabled ➔ Store compiled version {varDir}/cache/template/compiled/ ➔ NodeTreeCaching=enabled ( disabled by default ) ➔ Store pre-compiled version {varDir}/cache/template/tree/ Common mistake ➔ TemplateCache=enabled → template-block 8 / 61
  • 9.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS TPL COMPILATION DESIGN {varDir}/cache/template/tree {varDir}/cache/template/compiled page_mainarea.tpl {hash}-page_mainarea.php page_mainarea-{hash1}.php NodeTreeCaching=enabled page_mainarea-{hash2}.php ( disabled by default ) page_mainarea-{hash3}.php Why eZ generates several compiled files for the same .tpl? 9 / 61
  • 10.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS TPL COMPILATION How eZ stores the final compiled files ? {VarDir}/cache/template/compiled/, not clusterized Filenames : {templatename}-{hash}.php page_head-49f4458d0b68aec3cf2de63a6918fd61.php page_head-ec3cf2de63a6918fd6149f4458d0b68a.php 10 / 61
  • 11.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS TPL COMPILATION How eZ calculates the hash ? $sharedTemplates = false {VarDir}/cache/template/compiled/ Filenames : {templatename}-{hash}.php pagelayout-49f4458d0b68aec3cf2de63a6918fd61.php Md5( filepath ) / internalCharset / language / useFullUrlText / accessText / pageLayoutVariable / indexFile / extraName /layout/set/... 11 / 61
  • 12.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS TPL COMPILATION How eZ calculate the hash ? $sharedTemplates = true {VarDir}/cache/template/compiled/ Filenames : {templatename}-{hash}.php pagelayout-aec3cf2de63a6918fd6149f4458d0b68.php Md5( filepath ) / language No more siteaccess inside the key... Ezini operator → 'dynamic' parameter 12 / 61
  • 13.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXERCISE How to pre-compile a set of template files (to avoid : on the fly generating) ? ➔ Force the compilation of 2 template files php bin/php/eztc.php -s mysiteaccess --force extension/ezdemo/design/ezdemo/templates/page_head.tpl extension/ezdemo/design/ezdemo/templates/pagelayout.tpl ➔ Force the compilation of all template files starting with « page » : find extension/ezdemo/ -name "page_*.tpl" | xargs php bin/php/eztc.php -s eng --force ➔ Force the compilation of all template files from a TXT file : cat templates.txt | xargs php bin/php/eztc.php -s eng --force 13 / 61
  • 14.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS TPL COMPILATION The **** layout module ➔ By default ( $shareTemplates = false ), the 'layout' value is used by the final compiled filename ➔ So if you are using this module with 3 other layouts, you'll produce 4 compiled files (instead of 1) ➔ eztc.php script does not manage the layout parameter Your 3 additional compiled files ( for each layout ) will be procude « on the fly », and cannot be pre-compiled with eztc.php ➔ Suggestion : improve eztc.php, add the –layout=... parameter 14 / 61
  • 15.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE Concept / exploring the VAR Ex : HOWTO use dynamic settings with shared compiled templates VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE 15 / 61
  • 16.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS INI CACHE When eZ generates the INI cache ? ➔ On the fly (if the cache file does not exist) – from an API call (ezini PHP class), a template call (ezini operator) ➔ By default, eZ automatically check if an INI file has been changed or not, depending of this setting (config.php) //define( 'EZP_INI_FILEMTIME_CHECK', false ) ; /* Set EZP_INI_FILEMTIME_CHECK constant to false to improve performance ( 10% ~ 15% on I/O ) by not checking modified time on ini files. You can also set it to a string, the name of a ini file you still want to check modified time on, best example would be to set it to 'site.ini' to make the system still check that but not the rest. */ 16 / 61
  • 17.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS INI CACHE How eZ stores the INI cache ? ➔ var/cache/ini ( and not /{varDir}/ini ), not clusterized ➔ {inifilename}-{hash}.php design-677247a49e428aa0837411b52777b920.php design-704216b4d0e3ea68c09742504bb366c8.php design-7333039e7e19aa411f8dd01836555861.php md5 FileName / RootDir / DirectAccess / overrideDirs / internalCharset 17 / 61
  • 18.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS INI CACHE How to expire the INI cache ? ➔php bin/php/ezcache.php --clear-id=global_ini ➔ Remove var/cache/ini ➔php bin/php/ezcache.php --clear-tag=ini ➔ Remove var/cache/ini & var/cache/active_extensions_{hash}.php ➔php bin/php/ezcache.php --clear-id=ini ➔ Nothing (bug) : try to recursively delete INI files in {varDir}/ini 18 / 61
  • 19.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS INI CACHE How to not compile the INI value ? lib/ezutils/classes/ezini.php function eZINI( $fileName = 'site.ini', $rootDir = '', $useTextCodec = null, $useCache = null, $useLocalOverrides = null, $directAccess = false, $addArrayDefinition = false, $load = true ) { ... } Dynamically load the INI values inside your compiled templates : site.ini [eZINISettings] / DynamicTemplateMode=enabled OR Ezini operator → 'dynamic' parameter 19 / 61
  • 20.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXERCISE HOWTO use dynamic settings with shared compiled templates 20 / 61
  • 21.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE Concept / exploring the VAR Ex : HOWTO log the viewcache activity CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE 21 / 61
  • 22.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE What for ? ➔ Viewcache = content cache, content viewcache, … ➔ Viewcache is an HTML (or other) cache of the $module_result.content outpout, for a node view call ( content/view/... ) ← Illustration : Łukasz Serwatka http://share.ez.no/learn/ez-publish/ez-publish-performance-optimization- part-3-of-3-practical-cache-and-template-solutions/(page)/2 22 / 61
  • 23.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE How eZ stores the viewcache ? {VarDir}/cache/content/{siteaccess}/{number}/{number}/{number} {VarDir}/cache/content/{siteaccess}/ 2-ce182234bd70236c6a009578d2a34632.cache 20-ce182234bd70236c6a009578d2a34632.cache {VarDir}/cache/content/{siteaccess}/1 101-ce182234bd70236c6a009578d2a34632.cache 105-ce182234bd70236c6a009578d2a34632.cache {VarDir}/cache/content/{siteaccess}/5/2/1 52101-ce182234bd70236c6a009578d2a34632.cache 52144-ce182234bd70236c6a009578d2a34632.cache 23 / 61
  • 24.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE How eZ stores the viewcache ? {nodeid}-{hash}.php 2-ce182234bd70236c6a009578d2a34632.cache md5 required nodeID / viewMode / layout / language (view.p.) / offset (view.p.) / indexFile optionnal + roIeIDList / limitValueList / discountList / cacheNameExtra / pr_user / viewParameters / userPreferences ViewCacheTweaks[<node_id>]=<setting>[;<setting2>] ViewCacheTweaks[global]=<setting>[;<setting2>] 24 / 61
  • 25.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE How to know the exact matching between a viewcache file & my URLs ? {nodeid}-{hash}.php → deduce the nodeID At the end of file : "view_parameters";a:6: {s:6:"offset";b:0;s:4:"year";b:0;s:5:"month";b:0;s:3:"day";b:0;s:10:"na mefilter";b:0;s:4:"test";s:1:"2";}... Should be URL : /(test)/2 25 / 61
  • 26.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE How eZ expires a set of viewcache ? Alteration of cache states - Depending of the filehandler ( file.ini ) ➔ Ezfsfilehandler : UNLINK file ➔ Ezfs2filehandler : TOUCH file (25/25/1977) ← Star Wars day ➔ Ezdbfilehandler : "ezdbfile" (UPDATE expired=1) ➔ Ezdfsfilehandler : "ezdfsfile" (UPDATE expired=1) Comparison of cache states - Depending of the filehandler ( file.ini ) ➔ Ezfsfilehandler : file does not exist, or is older than the content-view-cache timestamp ➔ Ezfs2filehandler : file is older than the content-view-cache timestamp ➔ Ezdbfilehandler : "ezdbfile" (expired=1) ➔ Ezdfsfilehandler : "ezdfsfile" (expired=1) 26 / 61
  • 27.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE How eZ expires the ENTIRE viewcache ? ➔ eZ does not recursively update / delete the files (too many files... unsafe) eZ set a global timestamp expiry value : ➔ {VarDir}/cache/expiry.php ← 'content-view-cache' ( current timestamp) Each time the expiry.php is updated, the ENTIRE viewcache will expire. ➔ Ok, but my ENTIRE viewcache expires all the time... i did nothing special ! Don't know why ! 27 / 61
  • 28.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE Which event / trigger expires a set of cache ? By default : on object publication (or back-end feature) ➔ the related nodes & parent node Willingly, using a script : ➔ bin/php/ezcontentcache.php –clear-node=2 ➔ bin/php/ezcontentcache.php –clear-node=2,46,63 ➔ bin/php/ezcontentcache.php –clear-node=/company/about ➔ bin/php/ezcontentcache.php –clear-subtree=/company/about ➔ bin/php/ezcontentcache.php –clear-subtree=/company/about,/news 28 / 61
  • 29.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE Smart viewcache & cacheThreshold : a set of cache → the ENTIRE view cache Automatically, if using the smart view cache / viewcache.ini : ➔ The smart view cache populates a list of related « node_id » viewcache files to expire, depending of your settings. If this node_id list is larger than the CacheThreshold limit value (250 by default) → eZ expires the ENTIRE viewcache ! ➔ Some settings could increase the node_id list count & excede the CacheThreshold limit : ALL, siblings, KeywordNodesCacheClearLimit ➔ Advice : Set KeywordNodesCacheClearLimit = 0, never use ALL, avoid siblings, log out the CacheThreshold (ezpEvent) 29 / 61
  • 30.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXERCISE How to log the viewcache activity ? & prevent the CacheThreshold limit... Add an ezpEvent : site.ini.append.php [Event] Listeners[]=content/cache@log::logviewcache # log = your PHP class name # logviewcache = the static method 30 / 61
  • 31.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXERCISE Log the viewcache node_id list to expire, prevent the CacheThreshold limit... ➔ Create a PHP class / generate autoloads // extension/extension-name/classes/log.php <?php class log { static public function logviewcache( $nodeList ) { $uri = $GLOBALS['_SERVER']['REQUEST_URI']; eZLog::write('node_id count : '. count( $nodeList ). ' / node_id list : ' . implode(', ', $nodeList ) . ' / URI : '.$uri, 'cachethresold.log'); return $nodeList; }} ?> ➔ Generate autoloads : php bin/php/ezpgenerateautolaods.php 31 / 61
  • 32.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXERCISE Log the viewcache node_id list to expire, prevent the CacheThreshold limit... ● Edit / publish contents in the administration backend ➔ Log output : var/log/cachethreshold.log [ Sep 03 2012 17:37:33 ] node_id count : 14 / node_id list : 74, 73, 75, 76, 79, 80, 81, 84, 85, 78, 77, 82, 72, 100 / URI : /administration/content/edit/72/2/eng-GB [ Sep 05 2012 13:44:54 ] node_id count : 7 / node_id list : 89, 88, 90, 91, 2, 1, 87 / URI : /administration/content/edit/87/2/eng-GB [ Sep 05 2012 13:45:34 ] node_id count : 2 / node_id list : 2, 1 / URI : /administration/content/edit/57/2/eng-GB 32 / 61
  • 33.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXERCISE Log the viewcache node_id list to expire, prevent the CacheThreshold limit... ● Edit / publish contents in the administration backend ➔ Log output : var/log/cachethreshold.log [ Sep 03 2012 17:37:33 ] node_id count : 14 / node_id list : 74, 73, 75, 76, 79, 80, 81, 84, 85, 78, 77, 82, 72, 100 / URI : /administration/content/edit/72/2/eng-GB [ Sep 05 2012 13:44:54 ] node_id count : 7 / node_id list : 89, 88, 90, 91, 2, 1, 87 / URI : /administration/content/edit/87/2/eng-GB [ Sep 05 2012 13:45:34 ] node_id count : 2 / node_id list : 2, 1 / URI : /administration/content/edit/57/2/eng-GB 33 / 61
  • 34.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS VIEWCACHE My ENTIRE viewcache still expire... Maybe you invoked one of these features (back-end, API)  : ➔ Create a new content class ( BUG ? ) ➔ Update / delete an existing content class ( or attributes ) ➔ Update / delete and existing role ( & policies ) OR role assignement ➔ Section assignement ➔ Update an ezshop rule ( discount rules, currency... ) 34 / 61
  • 35.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS 35 / 61
  • 36.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS 36 / 61
  • 37.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE CACHE-BLOCK Concept / exploring the VAR Ex : HOWTO expire a named cache-block, related to the homepage expiry, or a contentclass, or whatever else Ex : HOWTO expire a set of cache-block using a shell script Ex : HOWTO build the perfect pagelayout EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE 37 / 61
  • 38.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK ... What for ? ➔ Template-block cache = cache files related to cache-block, also called « template cache » ( common mistake with the template compilation ) ➔ Template-block cache is an HTML (or other) cache of a template part ( cache-block ) ← Illustration : Łukasz Serwatka http://share.ez.no/learn/ez-publish/ez-publish-performance-optimization- part-3-of-3-practical-cache-and-template-solutions/(page)/2 38 / 61
  • 39.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « keys » parameter : Please AVOID : {cache-block keys=$uri_string} 1 template-block file for ... each URI !!! {/cache-block} Use instead : {cache-block keys=$my_custom_limited_range_key} ... {/cache-block} Only possible states of your content inside your block 39 / 61
  • 40.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « URI key » parameter : stupid but signifiant simulation ➔ A classic Web site, with 1000 nodes, news folder ( year, month archives ), products catalog ( filters ), calendar, forum... ➔ Could generate 10 000 « indexable » several URI ( google bot ) ➔ A cache-block ( only 1 URI key ) to cache the global menu, who is generating 300 SQL queries ➔ No « expiry » or « ignore_content_expiry » parameters : so the cache-block expires every 2 hours (or on content publication) ➔ So... 300 SQL queries * 12 expiration per day * 10 000 URI = 36 millions of SQL queries per day... 40 / 61
  • 41.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « expiry » parameter : If possible, always set a custom expiry value & ignore content expiry : {cache-block ignore_content_expiry expiry=86400} ... {/cache-block} 41 / 61
  • 42.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « sutree_expiry » parameter : no more expiry / ignore_content_expiry needed {cache-block subtree_expiry='news/'} ... {/cache-block} {cache-block subtree_expiry=142} ... {/cache-block} 42 / 61
  • 43.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK Impact of common parameters The « sutree_expiry » parameter : tip of the « magic » node ➔ To expire a cache-block, depending of a custom rule ( per content class, per PHP algorithm ... ) ➔ Create a {cache-block subtree_expiry=$magic_node_id} ➔ Create a node somewhere ( safe location, without FULL view ) ➔ Create a workflow or customedithandler to include your custom rules on publication, and update the content object related to the magic node by the code 43 / 61
  • 44.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK Cache-block imbrication {cache-block expiry=3600} ... {cache-block ignore_content_expiry expiry=86400} ... {* you save … SQL Queries each hours *} {/cache-block} ... {cache-block subtree_expiry='news/'} ... {/cache-block} ... {/cache-block} 44 / 61
  • 45.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK I need a « real time » block ( TTL=1m ) A cache-block may not be the solution, use instead : ➔ ESI ( Edge Side Include ) : better for front-end loading & google bot indexing. But reverse-proxy required ( varnish, squid, akamai... ) ➔ AJAX : easier to implement 45 / 61
  • 46.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK How eZ stores the template-block cache {VarDir}/cache/template-block/1/2/3/12345678.cache {VarDir}/cache/template-block/5/5/5/555666888.cache {VarDir}/cache/template-block/subtree/1/5/9/cache/1/2/3/12345678.cache subtree_expiry=159 CRC32 Complex... The pathname doesn't help 46 / 61
  • 47.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK How eZ stores the template-block cache {VarDir}/cache/template-block/1/2/3/12345678.cache CRC32 ( 32-bit polynomial checksum ) Cache-block position in the .tpl file / template path / keys / siteaccess 78_1_78_94_extension/ezwebin/design/ezwebin/templates/pagelayout.tpl 78 = {cache-block... } line start 1 = {cache-block... } column start (a simple ' ' before...) 78 = {cache-block... } line end 94 = {cache-block... } column end 47 / 61
  • 48.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK How to expire the ALL of the template- block cache files ? php bin/php/ezcache.php –clear-id=template-block ➔ Expires all the template-block files, by updating the global cache-block expiry time ( global-template-block-cache ) in the {varDir}/expiry.php file 48 / 61
  • 49.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK How to expire a set of specific template- block cache files ? ➔ Not really possible... exept by searching a specific string inside each files, and deleting matching files ( ezfs / ezFS2 ) ➔ find var/ezdemo_site/cache/template-block/ -name "*.cache" -exec grep -iHl "string-to-search" {} ; -delete {cache-block ignore_content_expiry expiry=0} <!-- string-to-search --> ... {/cache-block} 49 / 61
  • 50.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS CACHE-BLOCK PULL REQUEST IDEA : {cache-block id=myfolder ignore_content_expiry expiry=0} <!-- ID:BLOCK1 --> ... {/cache-block} {VarDir}/cache/template-block/myfolder/1/2/3/12345678.cache So... to expire your cache-block : mv myfolder myfolder-to-remove nice -n 20 rm -r myfolder-to-remove 50 / 61
  • 51.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXERCISE Ex : HOWTO expire a named cache-block, related to the homepage expiry, or a contentclass, or whatever else Ex : HOWTO expire a set of cache-block using a shell script Ex : HOWTO build the perfect pagelayout 51 / 61
  • 52.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE (not so) funny quiz EZCACHE.PHP SCRIPT PHP CACHE 52 / 61
  • 53.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXPIRY.PHP FILE <?php $Timestamps = array ( What for ? 'state-limitations' => 1321010927, 'user-info-cache' => 1323788789, 'content-view-cache' => 1326299075, 'class-identifier-cache' => 1326298969, 'global-template-block-cache' => 1325856140, 'content-tree-menu' => 1326298969, 'image-manager-alias' => 1323788788, 'active-extensions-cache' => 1325668728, 'ts-translation-cache' => 1323788789, 'content-complex-viewmode-cache' => 1325780763, 'template-block-cache' => 1326298969, 'user-class-cache' => 1326298969, 'sort-key-cache' => 1326298969, ); 53 / 61
  • 54.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT Concept / exploring the VAR Ex : HOWTO create a custom ezcache.php --id=myid PHP CACHE 54 / 61
  • 55.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT FAMOUS EZSCRIPT php bin/php/ezcache.php --clear-id=[ID] php bin/php/ezcache.php --clear-id=[ID] --purge php bin/php/ezcache.php --clear-tag=[TAG] php bin/php/ezcache.php --clear-tag=[TAG] --purge php bin/php/ezcache.php --clear-all php bin/php/ezcache.php --clear-all --purge NEED SOME HELP Does it do something php bin/php/ezcache.php --help special ? php bin/php/ezcache.php --list-ids Superstitious parameter php bin/php/ezcache.php --list-tags 55 / 61
  • 56.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT TAG ID content content / classid / sortey / urlalias / rss_cache / content_tree_menu / state_limiations / template-block / ezjscore-packer template template / template-block / template-override / texttoimage / design_base / ezjscore-packer ini ini / global_ini / active_extensions user user_info_cache I18n translation / chartrans codepage codepage image imagealias rest rest / rest-routes 56 / 61
  • 57.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT MAIN ALGORITHM Hardcoded in kernel/classes/ezcache.php. For each ID : 'id' => ID 'tag' => array( TAG LIST ) 'enabled' => Cache enabled or not 'is-clustered' => Use the current filehandler or not ? 'path' => Path to purge, if purging (is-clustered=false) 'expiry-key' => Key to set inside the expiry.php file if needed 'function' => Function to apply only on clearing (not purging) 'function-purge' => Function to apply only on purging (not clearing) 57 / 61
  • 58.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT MAIN ALGORITHM Add your own ID for your extensions ( site.ini.append.php ) # Cache item entry (for eZ Publish 4.3 and up) [Cache] CacheItems[]=ezjscore [Cache_ezjscore] name=eZJSCore Public Packer cache id=ezjscore-packer tags[]=content tags[]=template path=public isClustered=true 58 / 61
  • 59.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EXERCISE How to create a custom ID cache expiration  ? Use the ezbashcompletion extension : https://github.com/bdunogier/ezbashcompl etion 59 / 61
  • 60.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS EZCACHE.PHP SCRIPT A BUG HELPS TO UNDERSTAND php bin/php/ezcache.php --clear-id=ini array( 'name' => ezpI18n::tr( 'kernel/cache', 'INI cache' ), 'id' => 'ini', 'tag' => array( 'ini' ), 'enabled' => true, 'path' => 'ini' ), Why is it not working ? 60 / 61
  • 61.
    :~$ eZ PublishCaching Mechanisms // SPICY DETAILS AGENDA TEMPLATE COMPILATION INI CACHE VIEWCACHE CACHE-BLOCK EXPIRY.PHP FILE EZCACHE.PHP SCRIPT PHP CACHE Ex : HOWTO generate a PHP based cache file 61 / 61