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Subbu M Iyer commented on HBASE-451: ------------------------------------ I have one open issue on this. I need to address the cases when master crashes half way through the HRI migration process. I would like to address it as part of another JIRA as 1. I don't want to keep such a big change in my local with out commit for a long time 2) Also, it is easier for me to work on this issue off trunk rather than my local. (since I can be sure that everything else works and remains intact) 3) This will also help me keep my changes to a minimum and avoid a tedious patch work. Any thoughts/comments? > Remove HTableDescriptor from HRegionInfo > ---------------------------------------- > > Key: HBASE-451 > URL: https://issues.apache.org/jira/browse/HBASE-451 > Project: HBase > Issue Type: Improvement > Components: master, regionserver > Affects Versions: 0.2.0 > Reporter: Jim Kellerman > Assignee: Subbu M Iyer > Priority: Critical > Fix For: 0.92.0 > > Attachments: 451_support_for_removing_HTD_from_HRI_trunk.txt, > HBASE-451_-_First_draft_support_for_removing_HTD_from_HRI1.patch, > HBASE-451_-_Second_draft_-_Remove_HTD_from_HRI.patch > > > There is an HRegionInfo for every region in HBase. Currently HRegionInfo also > contains the HTableDescriptor (the schema). That means we store the schema n > times where n is the number of regions in the table. > Additionally, for every region of the same table that the region server has > open, there is a copy of the schema. Thus it is stored in memory once for > each open region. > If HRegionInfo merely contained the table name the HTableDescriptor could be > stored in a separate file and easily found. -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira