Make bulk assignment on cluster startup run faster
--------------------------------------------------
Key: HBASE-3019
URL: https://issues.apache.org/jira/browse/HBASE-3019
Project: HBase
Issue Type: Improvement
Reporter: stack
Currently, as of HBASE-3018, we come up with a bulk assignment plan that is
sorted by server. We then spawn a thread to assign out the regions per server
so we are assigning in parallel. This works but is still slow enough (It looks
to be slower than the old assignment where we'd do lumps of N regions at a
time). We should be able to pass a regionserver all the regions to open in one
RPC. We need to figure how to keep up zk state while regionserver is
processing a big lot of regions. This looks a little awkward to do since
currently open handler just opens region -- there is no notion of doing a ping
while waiting to run.
Being able to start the cluster fast is important for those times we take it
down to do major upgrade; the longer it takes to spin up, the longer our
'downtime'.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
