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jirapos...@reviews.apache.org commented on HBASE-4358: ------------------------------------------------------ ----------------------------------------------------------- This is an automatically generated e-mail. To reply, visit: https://reviews.apache.org/r/1768/ ----------------------------------------------------------- (Updated 2011-09-09 21:23:14.655517) Review request for hbase. Changes ------- Addressed various comments made here. Summary ------- Currently, the RPC provides no way of asking for several table alterations at once, and the master has no way of batch handling alter requests. Thus, when the user requests several changes at the same time (i.e. add these I columns, delete these J columns, and modify these K columns), each region is brought down (I+J+K) times so that it can reflect the new schema. Additionally, multiple writes are made to META, and multiple RPC calls must be made. This patch provides batching for these operations, both at the RPC level and within the Master's TableEventHandlers. This involves a bit of reorganization in the TableEventHandler class hierarchy, and a new TableEventHandler, TableMultiFamilyHandler. The net effect ends up being the difference seen here: Before patch: hbase(main):001:0> alter 'peeps', {NAME => 'rawr'}, {METHOD => 'delete', NAME => 'name'} Updating all regions with the new schema... 1/1 regions updated. Done. Updating all regions with the new schema... 1/1 regions updated. Done. 0 row(s) in 2.6450 seconds After patch: hbase(main):002:0> alter 'peeps', {NAME => 'rawr'}, {METHOD => 'delete', NAME => 'name'} Updating all regions with the new schema... 1/1 regions updated. Done. 0 row(s) in 1.1930 seconds Regions are only brought down once, and the duration is cut 1/N. This addresses bug HBASE-4358. https://issues.apache.org/jira/browse/HBASE-4358 Diffs (updated) ----- /src/main/java/org/apache/hadoop/hbase/HTableDescriptor.java 1166933 /src/main/java/org/apache/hadoop/hbase/client/HBaseAdmin.java 1166933 /src/main/java/org/apache/hadoop/hbase/coprocessor/BaseMasterObserver.java 1166933 /src/main/java/org/apache/hadoop/hbase/coprocessor/MasterObserver.java 1166933 /src/main/java/org/apache/hadoop/hbase/executor/EventHandler.java 1166933 /src/main/java/org/apache/hadoop/hbase/ipc/HMasterInterface.java 1166933 /src/main/java/org/apache/hadoop/hbase/master/HMaster.java 1166933 /src/main/java/org/apache/hadoop/hbase/master/MasterCoprocessorHost.java 1166933 /src/main/java/org/apache/hadoop/hbase/master/handler/TableAddFamilyHandler.java 1166933 /src/main/java/org/apache/hadoop/hbase/master/handler/TableDeleteFamilyHandler.java 1166933 /src/main/java/org/apache/hadoop/hbase/master/handler/TableFamilyHandler.java PRE-CREATION /src/main/java/org/apache/hadoop/hbase/master/handler/TableModifyFamilyHandler.java 1166933 /src/main/java/org/apache/hadoop/hbase/master/handler/TableMultiFamilyHandler.java PRE-CREATION /src/main/ruby/hbase/admin.rb 1166933 /src/test/java/org/apache/hadoop/hbase/coprocessor/TestMasterObserver.java 1166933 Diff: https://reviews.apache.org/r/1768/diff Testing ------- Sanity checked functionality in psuedo-distributed mode (tried several permutations of different alterations, all completed successfully and with only one round of region restarts). Ran all unit tests successfully. Thanks, Riley > Batch Table Alter Operations > ---------------------------- > > Key: HBASE-4358 > URL: https://issues.apache.org/jira/browse/HBASE-4358 > Project: HBase > Issue Type: Improvement > Components: ipc, master, shell > Affects Versions: 0.92.0 > Reporter: Riley Patterson > Assignee: Riley Patterson > Priority: Minor > Attachments: HBASE-4358-v2.patch, HBASE-4358.patch > > > Currently, the RPC provides no way of asking for several table alterations at > once, and the master has no way of batch handling alter requests. Thus, when > the user requests several changes at the same time (i.e. add these I columns, > delete these J columns, and modify these K columns), each region is brought > down (I+J+K) times so that it can reflect the new schema. Additionally, > multiple writes are made to META, and multiple RPC calls must be made. > This patch provides batching for these operations, both at the RPC level and > within the Master's TableEventHandlers. This involves a bit of reorganization > in the TableEventHandler class hierarchy, and a new TableEventHandler, > TableMultiFamilyHandler. The net effect ends up being the difference seen > here: > Before patch: > hbase(main):001:0> alter 'peeps', {NAME => 'rawr'}, {METHOD => 'delete', NAME > => 'name'} > Updating all regions with the new schema... > 1/1 regions updated. > Done. > Updating all regions with the new schema... > 1/1 regions updated. > Done. > 0 row(s) in 2.6450 seconds > After patch: > hbase(main):002:0> alter 'peeps', {NAME => 'rawr'}, {METHOD => 'delete', NAME > => 'name'} > Updating all regions with the new schema... > 1/1 regions updated. > Done. > 0 row(s) in 1.1930 seconds > Regions are only brought down once, and the duration is cut 1/N. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira