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Re: how update occurs in ndb cluster
Posted by: deepak m
Date: March 27, 2012 07:21AM

hi

start the memcached with following options

/usr/local/mysql/bin/memcached -E /path/to/ndb_engine.so -e "connectstring=<managmt host ip>:1186;role=db-only;debug=true" -vv -u root


to work with memcached you need to import this sql file

/usr/local/mysql/share/memcache-api/ndb_memcache_metadata.sql


memcached will first checks the ndbmemcache database
in that cache_policies table is there

there are 4 types of policies are there those are

cache_only: updates will be done for cache only
ndb_only: updated will be done for database only
caching: first it will updates database and then cache
disabled: not permit anything

we can set these froperty for GET,SET,ADD,FLUSH metheds in cache_policies table

container is the table which contains container name which database,which table, key columns,value columns informations

key_prefixes is the another table which contains the key prefix name which policy name to be used and the container name

check below link for more info
http://docs.oracle.com/cd/E17952_01/refman-5.5-en/mysql-cluster-ndbmemcache-configuration.html

Regards
Deepak M

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Re: how update occurs in ndb cluster
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