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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-19806) Lower max versions for selected system table column family
Date Tue, 16 Jan 2018 21:55:00 GMT
Ted Yu created HBASE-19806:
------------------------------

             Summary: Lower max versions for selected system table column family
                 Key: HBASE-19806
                 URL: https://issues.apache.org/jira/browse/HBASE-19806
             Project: HBase
          Issue Type: Bug
            Reporter: Ted Yu


On an hbase 2 cluster, I got the description of hbase:meta table:
{code}
{NAME => 'info', VERSIONS => '3', EVICT_BLOCKS_ON_CLOSE => 'false', NEW_VERSION_BEHAVIOR
=> 'false', KEEP_DELETED_CELLS => 'FALSE', CACHE_DATA_ON_WRITE => 'false', DATA_BLOCK_ENCODING
=> 'NONE', TTL => 'FOREVER', MIN_VERSIONS => '0',
REPLICATION_SCOPE => '0', BLOOMFILTER => 'NONE', CACHE_INDEX_ON_WRITE => 'false',
IN_MEMORY => 'true', CACHE_BLOOMS_ON_WRITE => 'false', PREFETCH_BLOCKS_ON_OPEN =>
'false', COMPRESSION => 'NONE', BLOCKCACHE => 'true', BLOCKSIZE => '81
92'}
...
{NAME => 'table', VERSIONS => '10', EVICT_BLOCKS_ON_CLOSE => 'false', NEW_VERSION_BEHAVIOR
=> 'false', KEEP_DELETED_CELLS => 'FALSE', CACHE_DATA_ON_WRITE => 'false', DATA_BLOCK_ENCODING
=> 'NONE', TTL => 'FOREVER', MIN_VERSIONS => '0'
, REPLICATION_SCOPE => '0', BLOOMFILTER => 'NONE', CACHE_INDEX_ON_WRITE => 'false',
IN_MEMORY => 'true', CACHE_BLOOMS_ON_WRITE => 'false', PREFETCH_BLOCKS_ON_OPEN =>
'false', COMPRESSION => 'NONE', BLOCKCACHE => 'true', BLOCKSIZE => '
8192'}
{code}
You can see that 'table' family has MAX VERSIONS much higher than the other families.
The MAX VERSIONS value should be brought in sync with the other families.

For namespace table:
{code}
{NAME => 'info', VERSIONS => '10', EVICT_BLOCKS_ON_CLOSE => 'false', NEW_VERSION_BEHAVIOR
=> 'false', KEEP_DELETED_CELLS => 'FALSE', CACHE_DATA_ON_WRITE => 'false', DATA_BLOCK_ENCODING
=> 'NONE', TTL => 'FOREVER', MIN_VERSIONS => '0',
 REPLICATION_SCOPE => '0', BLOOMFILTER => 'ROW', CACHE_INDEX_ON_WRITE => 'false',
IN_MEMORY => 'true', CACHE_BLOOMS_ON_WRITE => 'false', PREFETCH_BLOCKS_ON_OPEN =>
'false', COMPRESSION => 'NONE', BLOCKCACHE => 'true', BLOCKSIZE => '81
92'}
{code}
Having MAX VERSIONS of 3 should be enough.



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