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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