Csql Cache Presentation
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CSQL Caching enables applications to significantly improve its throughput. As data is cached on the main-memory database, cache delivers a real-time, dynamic, updatable cache for ...

CSQL Caching enables applications to significantly improve its throughput. As data is cached on the main-memory database, cache delivers a real-time, dynamic, updatable cache for frequently accessed data in the disk based databases such as Oracle, MySQL or
Postgres.

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Csql Cache Presentation Csql Cache Presentation Presentation Transcript

  • CSQL DATABASE CACHE Bijaya Kumar Sahu Database Developer Lakshya Solutions Pvt Ltd [email_address]
  • What Is Next…
    • CSQL Cache Functionalities
    • CSQL Cache Configuration
    • Cache Tools
    Information About :
  • What is CSQL Cache ? CSQL Cache is a client side caching mechanism for any disk-based database which increase the throughput of existing applications without requiring any application changes.
  • CSQL Cache Functionalities
    • Updateable Cache Tables
    • Bi-Directional Updates
    • Synchronous and Asynchronous update propagation
    Cont…
  • CSQL Cache Functionalities
    • Partial cache Updates
    • Multiple cache granularity
    • Recovery for cached tables
    Cont…
  • CSQL Cache Functionalities
    • Tools to validate the coherence of cache
    • Transparent access to non-cached tables
    • Horizontally Scalable
    • Transparent Fail over
  • CSQL Cache Configuration
    • CACHE_TABLE
    • CACHE_ID
    • DSN
    • ENABLE_BIDIRECTIONAL_CACHE
    • CACHE_RECEIVER_WAIT_SECS
    • TABLE_CONFIG_FILE
    For CSQL Cache Configuration , Following flag need to be set which is present in “ csql.conf ” file.
  • Unidirectional Cache Configuration
    • CACHE_TABLE = true
    • CACHE_ID = 1
    • DSN = <Dsn name of target database>*
    • ENABLE_BIDIRECTIONAL_CACHE = false
    • CACHE_RECEIVER_WAIT_SECS = 10
    • TABLE_CONFIG_FILE = <path of table configure file>**
    For Unidirectional Caching, Set flags as below Cont…
  • Unidirectional Cache Configuration
    • For Unidirectional Caching, Be sure that
    • CSQL server and target database is running.
    • Isql tool for target database working properly.
    • Use cache tool to cache table to Cache node.
  • Bi-Directional Cache Configuration For Bi-Directional Caching, Set flags as below
    • CACHE_TABLE = true
    • CACHE_ID = 1
    • DSN = <Dsn name of target database>*
    • ENABLE_BIDIRECTIONAL_CACHE = true
    • CACHE_RECEIVER_WAIT_SECS = 10
    • TABLE_CONFIG_FILE = <path of table configure file>**
    Cont… * For MySql := myodbc3, For Postgres : = psql etc. ** By default path /tmp/csql/csqltable.conf
  • Bi-Directional Cache Configuration Create log table in target database. For MySql : create table csql_log_int ( tablename char(64), pkid int, operation int , cacheid int, id int not null unique auto_increment) engine=‘innodb’ ; For Postgres : create table csql_log_int( tablename varchar(64), pkid int, operation int,cacheid int); alter table csql_log_int add id serial; Cont…
  • Bi-Directional Cache Configuration
    • For Bi-directional Caching,
    • Run Trigger on key field of cached table.
    • Configure Isql tool for target database
    • Be sure CSQL server and target database server are running
    • Use cache tool to cache table to Cache node.
  • Multiple Cache Node Configuration
    • For Multiple Cache Node Configuration
    • Change CACHE_ID in the csql.conf file as unique id for different cache
    • node.
    • Configure as per Bi-directional Cache Node.
    • Be sure CSQL server in each node and target database server are running.
    • Use cache tool to cache table into each Cache Node .
    • Make appropriate changes in trigger file.
  • Cache Tools CSQL Cache have following Cache tools.
    • cachetable
    • cacheverify
    Cont…
  • Cache Tools ( cachetable )
    • Full Caching
    • Partial Caching ( Record based & Field based )
    • Caching with Direct Updates
    CSQL supports three ways of caching mode Cont… To cache table from target database to cache node.
  • Cache Tools ( cachetable ) Usage cachetable [-U username] [-P password] -t tablename [-D] -c &quot;condition&quot; -f &quot;selected field names&quot; -p fieldname [-R] [-s] [-r] username -> username to connect with csql. password -> password for the above username to connect with csql. tablename -> table name to be cached in csql from target db. Cont…
  • Cache Tools ( cachetable ) fieldname -> field name to be specified for the bidirectional caching on which trigger to be run . R -> Recover all cached tables from the target database. s -> Load only the records from target db. Assumes table is already created in csql r -> Reload the table. get the latest image of table from target db Cont…
  • Cache Tools ( cachetable ) u -> Unload the table. if used with -s option, removes only records and preserves the schema D -> Enable direct option. For any non select SQL statement directly interact with target database. no option -> Get table definition and records from target db and create in csql.
  • Cache Tools ( cacheverify ) Usage cacheverify [-U username] [-P password] -t tablename [-p] [-f] username -> username to connect with csql. password -> password for the above username to connect with csql. Display the consistency in the specified cached table in between cache node and target database. Cont…
  • Cache Tools ( cacheverify ) tablename -> cached table name in csql from target db. p -> verification at primary key field level f -> verification at record level ?-> help
  • For More Information Visit… http://sourceforge.net/projects/csql/ http://www.csqlcache.com/ http://www.csqldb.com/