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https://issues.apache.org/jira/browse/HBASE-16076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15341476#comment-15341476
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Youngjoon Kim commented on HBASE-16076:
---------------------------------------
This command is executed without any error, but it doesn't set the split policy
actually.
If I create a table using Java API, the table description is as follow.
SPLIT_POLICY is in METADATA in TABLE_ATTRIBUTES.
{noformat}
hbase(main):151:0* describe 'test'
Table test is ENABLED
test, {TABLE_ATTRIBUTES => {METADATA => {'SPLIT_POLICY' =>
'org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy'}}
COLUMN FAMILIES
DESCRIPTION
{NAME => 'c', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW',
REPLICATION_SCOPE => '0', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS
=> '0', TTL => 'FOREVER', KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536',
IN_MEMORY => 'false', BLOCKCACHE => 'true'}
1 row(s) in 0.0210 seconds
{noformat}
But, after running the shell command, the table description is as follow.
SPLIT_POLICY is not in TABLE_ATTRIBUTES.
{noformat}
hbase(main):142:0> describe 'test'
Table test is ENABLED
test, {CONFIGURATION => {'SPLIT_POLICY' =>
'org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy'}}
COLUMN FAMILIES DESCRIPTION
{NAME => 'cf1', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW',
REPLICATION_SCOPE => '0', VERSIONS => '1', COMPRESSION => 'NONE', MIN_VERSIONS
=> '0', TTL => 'FOREVER', KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536',
IN_MEMORY => 'false', BLOCKCACHE => 'true'}
1 row(s) in 0.0170 seconds
{noformat}
And with a manual split test, I could see the shell command has no effect on
the split policy. I suspect HBase shell doesn't support split policy
configuration.
> Cannot configure split policy in HBase shell
> --------------------------------------------
>
> Key: HBASE-16076
> URL: https://issues.apache.org/jira/browse/HBASE-16076
> Project: HBase
> Issue Type: Bug
> Components: documentation
> Affects Versions: 2.0.0
> Reporter: Youngjoon Kim
> Priority: Minor
> Fix For: 2.0.0
>
> Attachments: HBASE-16076.patch
>
>
> The reference guide explains how to configure split policy in HBase
> shell([link|http://hbase.apache.org/book.html#_custom_split_policies]).
> {noformat}
> Configuring the Split Policy On a Table Using HBase Shell
> hbase> create 'test', {METHOD => 'table_att', CONFIG => {'SPLIT_POLICY' =>
> 'org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy'}},
> {NAME => 'cf1'}
> {noformat}
> But if run that command, shell complains 'An argument ignored (unknown or
> overridden): CONFIG', and the table description has no split policy.
> {noformat}
> hbase(main):067:0* create 'test', {METHOD => 'table_att', CONFIG =>
> {'SPLIT_POLICY' =>
> 'org.apache.hadoop.hbase.regionserver.ConstantSizeRegionSplitPolicy'}}, {NAME
> => 'cf1'}
> An argument ignored (unknown or overridden): CONFIG
> Created table test
> Took 1.2180 seconds
> hbase(main):068:0> describe 'test'
> Table test is ENABLED
> test
> COLUMN FAMILIES DESCRIPTION
> {NAME => 'cf1', DATA_BLOCK_ENCODING => 'NONE', BLOOMFILTER => 'ROW',
> REPLICATION_SCOPE => '0', COMPRESSION => 'NONE', VERSIONS => '1', TTL =>
> 'FOREVER', MIN_VERSIONS => '0', IN_MEMORY_COMPACTION => 'false',
> KEEP_DELETED_CELLS => 'FALSE', BLOCKSIZE => '65536', IN_MEMORY => '
> false', BLOCKCACHE => 'true'}
> 1 row(s)
> Took 0.0200 seconds
> {noformat}
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