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https://issues.apache.org/jira/browse/HBASE-6459?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhihong Ted Yu updated HBASE-6459:
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Status: Patch Available (was: Open)
> improve speed of create table
> -----------------------------
>
> Key: HBASE-6459
> URL: https://issues.apache.org/jira/browse/HBASE-6459
> Project: HBase
> Issue Type: Improvement
> Affects Versions: 0.94.0
> Reporter: zhou wenjian
> Fix For: 0.96.0
>
> Attachments: HBASE-6459-90.patch, HBASE-6459-92.patch,
> HBASE-6459-94.patch, HBASE-6459-trunk-v2.patch, HBASE-6459-trunk.patch
>
>
> 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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