[
https://issues.apache.org/jira/browse/HBASE-4554?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13123241#comment-13123241
]
Ted Yu commented on HBASE-4554:
-------------------------------
This would be a useful feature.
COPROCESSOR$1 needs to be defined as a constant if we follow example from
src/main/ruby/hbase/admin.rb:
{code}
if method == "table_att"
htd.setMaxFileSize(JLong.valueOf(arg[MAX_FILESIZE])) if
arg[MAX_FILESIZE]
{code}
I think table_att method targets known table attributes.
For HBASE-4554, we can introduce new method, e.g. table_dyn_att, which accepts
two parameters: KEY and VALUE:
{code}
hbase> alter 't1', {METHOD => 'table_dyn_att', KEY => 'COPROCESSOR$1', VALUE =>
'hdfs://cp/foo.jar|org.apache.hadoop.hbase.sample|1|' }
{code}
> Allow set/unset arbitrary table attributes from shell.
> ------------------------------------------------------
>
> Key: HBASE-4554
> URL: https://issues.apache.org/jira/browse/HBASE-4554
> Project: HBase
> Issue Type: Improvement
> Components: coprocessors
> Reporter: Mingjie Lai
> Assignee: Mingjie Lai
> Fix For: 0.92.0
>
>
> Table/region level coprocessor -- RegionObserver -- can be configured by
> setting a HTD's attribute which matches Coprocessor$*.
> Current shell -- alter -- cannot support to set/unset a table's arbitrary
> attribute. We need it in order to configure region level coprocessors to a
> table.
> Proposed new shell:
> {code}
> hbase shell > alter 't1', METHOD => 'table_att', COPROCESSOR$1 =>
> 'hdfs://cp/foo.jar|org.apache.hadoop.hbase.sample|1|'
> hbase shell > describe 't1'
> {NAME => 't1', COPROCESSOR$1 =>
> 'hdfs://cp/foo.jar|org.apache.hadoop.hbase.sample|1|', MAX_FILESIZE =>
> '134217728', ...}
> hbase shell > alter 't1', METHOD => 'table_att_unset', COPROCESSOR$1
> hbase shell > describe 't1'
> {NAME => 't1', MAX_FILESIZE => '134217728', ...}
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
