Duo Zhang created HBASE-22124:
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Summary: Optimize the performance for region moving
Key: HBASE-22124
URL: https://issues.apache.org/jira/browse/HBASE-22124
Project: HBase
Issue Type: Improvement
Reporter: Duo Zhang
It is an admin operation so we do not care much about the performance in the
past, but it is really important for rolling upgrade.
For AsyncAdmin, if encoded name is present at client side, we will always scan
the whole meta region to find the region record first, which is really
expensive for a large cluster.
And we always send the encoded name to master, so at master side, we still need
the encoded name -> region name converting, and it is still very expensive
{code}
public RegionState getRegionState(final String encodedRegionName) {
// TODO: Need a map <encodedName, ...> but it is just dispatch merge...
for (RegionStateNode node: regionsMap.values()) {
if (node.getRegionInfo().getEncodedName().equals(encodedRegionName)) {
return node.toRegionState();
}
}
return null;
}
{code}
Need to fix them both.
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