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From "Youngjoon Kim (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-16076) Cannot configure split policy in HBase shell
Date Tue, 21 Jun 2016 09:58:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-16076?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15341476#comment-15341476
] 

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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