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The impact of MultiTenant Architecture in the develop of Java within the RDBMS

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The development of database residente Java applications has an impact with the new multitenant architecture, more specifically the CBD / PDBs concepts.This session will cover details like the use of common operating system resources such as sockets, file system, logging and others, and RDBMS common resources like JIT, jobs scheduler and so on.Also some best practices to solve tipicall pitfalls and guidelines for development and deployment.

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The impact of MultiTenant Architecture in the develop of Java within the RDBMS

  1. 1. Experiences with Evangelizing Java Within the Database The impact of MultiTenant Architecture in the develop of Java within the RDBMS The impact of MultiTenant Architecture in the develop of Java within the RDBMS
  2. 2. About ● About me – CTO at Scotas.com – Founder of the ArOUG – ACE Member since 2006 – Open Source Developer (DBPrism/ DBPrism CMS, LDI, ...) – Oracle developer since 1999 ● About Scotas – A company specialized in free text search, synchronization and Oracle – OLS, Native Solr integration – External Solr/ ElasticSearch integration www.scotas.com
  3. 3. www.scotas.com Agenda – Database resident JVM – History of the JVM implementation – Multitenant Architecture ● Process ● Storage ● OS resources – Conclusion
  4. 4. Database resident JVM time-line ● 8i (1999, JDK1.2, JSP, ORB, NCOMP) ● 9i (2001, JDK 1.3, NCOMP) ● 10g (2003 R1, 2005 R2, JDK 1.4, NCOMP) ● 11g (2007, JDK 1.5, JIT) ● 12c (2013, JDK 1.6/1.7/.., JIT) www.scotas.com
  5. 5. Database resident JVM architecture www.scotas.com Components
  6. 6. Sun’s JDK versus Database resident JVM Sun’s JDK VM ● Thread Based ● Sharing across Threads ● Limited Scalability ● Classes in file system ● Resolve classes with “Classpath” ● JIT ● Preemptive multi-threading ● Limited Robustness (process failure) Database resident JVM ● Database Session Model ● Session Isolation ● Unlimited Scalability ● Classes in database ● Resolve classes with “Resolver Spec” ● JIT (11g and up) ● Non-Preemptive multi- threading ● Does not crash as a whole www.scotas.com
  7. 7. Oracle’s Commitment to OJVM ● Used by a growing number of database customers acording to Oracle ● Used by Oracle Components – InterMedia – Spatial – Text – XQuery (XMLDB) – WareHouse Builder – CDC (Change Data Capture) – ODM (Oracle Data Mining analytics functions) ● 12c Enhancements www.scotas.com
  8. 8. ● Many among Fortune 500 companies ● Some examples from “Java in the Oracle Database @ Work – Customer Case Studies” ● And for sure Scotas & Cima Who is Using OJVM www.scotas.com
  9. 9. Java in the Database: What For www.scotas.com ● Trigger-based Notification System using RMI ● Secure Credit-Card Processing using JSSE ● Custom Alert applications that monitor business data ● Sending emails with attachment from within the database ● Produce PDF files from Result Set ● Execute external OS commands and external procedures ● Implement Md5 CRC ● Publish Repository Content to Portal ● Portable Logistic Applications ● Implement Parsers for various File Formats (txt, zip, xml, binary) ● Implement Image Transformation and Format Conversion (GIF, PNG, JPEG, etc) ● Implement Database-resident Content Management System ● HTTP Call-Out ● JDBC Call-Out ● RMI Call-Out to SAP ● Web Services Call-Out ● Messaging across Tiers ● RESTful Database Web Services ● Near Real Time Full Text Search
  10. 10. Multitenant Architecture - Process www.scotas.com
  11. 11. Multitenant Architecture - Storage www.scotas.com
  12. 12. Multitenant resources www.scotas.com ● Process – CPU – Memory ● Filesystem ● Network
  13. 13. Process - CPU resources www.scotas.com ● Estimate CPU usage by OJVM – Process connected using shared servers – Process connected using dedicted servers – Jobs process – AQ process implemented in Java ● DBMS Resource Manager – CPU Caging ● Dedicated plan for each PDBs – Shares – % CPU – % Parallel Servers ● Dedicated plan for Jobs process
  14. 14. Process - Memory resources www.scotas.com ● Estimate memory usage by OJVM – SGA/UGA used by dedicated or shared server process – Jobs process count as dedicated process – Look for global parameters: ● memory_target ● memory_max_target ● shared_pool_size (8Kb x load class) ● java_pool_size (during executing) ● java_soft_sessionspace_limit (soft limit, warning msg) ● java_max_sessionspace_limit (hard limit, default 4Gb) ● Fine tunning using JMX monitoring
  15. 15. Filesystem resources www.scotas.com ● Logging – $ORACLE_HOME/javavm/lib/logging.properties ● Accesing to files – dbms_java.grant_permission ● Properties files – $ORACLE_HOME/javavm/lib/management/jmxremote.access – $ORACLE_HOME/javavm/lib/management/management.properties ● Trace files (Diag. directory) – alert_orcl.log – orcl_jnnn.trc ● Tablespaces/Datafiles ● JDK version per CDB 1.6/1.7 ● IO metrics (Max. IOPS) – dbms_resource_manager.calibrate_io
  16. 16. Network resources www.scotas.com ● ACLs – DBMS_NETWORK_ACL_ADMIN ● Protocol handlers (XMLDB) – dbms_xdb.setFtpPort – dbms_xdb.setHttpPort ● Security – dbms_java.grant_permission
  17. 17. Network resources www.scotas.com ● ACLs – DBMS_NETWORK_ACL_ADMIN ● Protocol handlers (XMLDB) – dbms_xdb.setFtpPort – dbms_xdb.setHttpPort ● Security – dbms_java.grant_permission
  18. 18. Deployments best practices www.scotas.com ● CDB/PDBs ● Patching ● Application segmentation
  19. 19. Examples - Scotas OLS www.scotas.com ● An Embedded version of Solr Framework running inside Oracle JVM ● 42 new Java Classes and several new PLSQL Object Types ● Four new SQL operators scontains(), sscore(), smlt(), shighlight() and poweful text analysis functionalities ● An orthogonal/up-to-date Solr solution for any programming language, especially Java, Ruby, Python, PHP and .Net, currently latest production version – 4.0.0. ● Available to any Oracle product such as BI, Apex, ODM CREATE INDEX SIDX_A ON TEST_SOURCE_BIG(TEXT) INDEXTYPE IS LUCENE.SOLRINDEX parameters('DefaultColumn:text_tn;BatchCount:5000;CommitOnSync:false;LockMasterTable:f alse;IncludeMasterColumn:false;Updater:localhost@9099;Searcher:localhost@9099;SyncMod e:OnLine;LogLevel:WARNING;ExtraCols:text "text_tn",line "line_tin", type "type_sn",substr(text,1,256) "title";HighlightColumn:title;MltColumn:title;LobStorageParameters:STORAGE (BUFFER_POOL KEEP) CACHE READS FILESYSTEM_LIKE_LOGGING'); CREATE INDEX SIDX_A ON TEST_SOURCE_BIG(TEXT) INDEXTYPE IS LUCENE.SOLRINDEX parameters('DefaultColumn:text_tn;BatchCount:5000;CommitOnSync:false;LockMasterTable:f alse;IncludeMasterColumn:false;Updater:localhost@9099;Searcher:localhost@9099;SyncMod e:OnLine;LogLevel:WARNING;ExtraCols:text "text_tn",line "line_tin", type "type_sn",substr(text,1,256) "title";HighlightColumn:title;MltColumn:title;LobStorageParameters:STORAGE (BUFFER_POOL KEEP) CACHE READS FILESYSTEM_LIKE_LOGGING');
  20. 20. Examples – Scotas OLS in action www.scotas.com
  21. 21. Examples – Scotas OLS in action www.scotas.com
  22. 22. Conclusions ● Multitenant is about isolating data ● OS resources are shared – Is very important take this into account ● Applications need to be re-tested again ● Data which refers to OS resources need to be updated when plug/unplug PDBs www.scotas.com
  23. 23. Answers! www.scotas.com | info@scotas.com | +1 (650) 704-7915 | 440 North Wolfe Road, Sunnyvale, CA 94085
  24. 24. Thank You! www.scotas.com | info@scotas.com | +1 (650) 704-7915 | 440 North Wolfe Road, Sunnyvale, CA 94085

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