zhou wenjian created HBASE-6459:
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Summary: improve speed of create table
Key: HBASE-6459
URL: https://issues.apache.org/jira/browse/HBASE-6459
Project: HBase
Issue Type: Bug
Affects Versions: 0.94.0
Reporter: zhou wenjian
Fix For: 0.94.1
in CreateTableHandler
for (int regionIdx = 0; regionIdx < this.newRegions.length; regionIdx++) {
HRegionInfo newRegion = this.newRegions[regionIdx];
// 1. Create HRegion
HRegion region = HRegion.createHRegion(newRegion,
this.fileSystemManager.getRootDir(), this.conf,
this.hTableDescriptor, null, false, true);
regionInfos.add(region.getRegionInfo());
if (regionIdx % batchSize == 0) {
// 2. Insert into META
MetaEditor.addRegionsToMeta(this.catalogTracker, regionInfos);
regionInfos.clear();
}
// 3. Close the new region to flush to disk. Close log file too.
region.close();
}
All the region will be create serially.
If we have thousands of regions, that will be a huge cost.
We can improve it by create the region in parallel
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