Gokcen Iskender created PHOENIX-5272:
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Summary: Support ALTER INDEX REBUILD ALL ASYNC to fully rebuild
global indexes async
Key: PHOENIX-5272
URL: https://issues.apache.org/jira/browse/PHOENIX-5272
Project: Phoenix
Issue Type: Bug
Reporter: Gokcen Iskender
Assignee: Gokcen Iskender
Fix For: 4.15.0, 5.1.0
Currently if we run "ALTER INDEX ... REBUILD" , all the rows in the index are
deleted and the index is rebuilt synchronously.
"ALTER INEX ... REBUILD ASYNC" seems to be used for the IndexTool's partial
rebuild option, rebuilding from ASYNC_REBUILD_TIMESTAMP (PHOENIX-2890)
So it seems currently the only way to fully rebuild is the drop the index, and
recreate it. This is burdensome as it requires have the schema DDL.
We should have an option to fully rebuild asynchronously, that has the same
semantics as dropping and recreating the index. A further advantage of this is
we can maintain the splits of the index table while dropping its data. We are
currently seeing issues where rebuilding a large table via a MR job results in
hotspotting due to all data regions writing to the same index region at the
start.
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