[HBASE-68] [hbase] HStoreFiles needlessly store the column family name in every entry

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Not A Problem
• Component/s: regionserver
• Assignee: Unassigned
• Reporter: Bryan Duxbury
• Created: 04/Jan/08 01:52
• Updated: 11/Jun/22 19:48
• Resolved: 08/Jun/14 21:49

Description

Today, HStoreFiles keep the entire serialized HStoreKey objects around for every cell in the HStore. Since HStores are 1-1 with column families, this is really unnecessary - you can always surmise the column family by looking at the HStore it belongs to. (This information would ostensibly come from the file name or a header section.) This means that we could remove the column family part of the HStoreKeys we put into the HStoreFile, reducing the size of data stored. This would be a space-saving benefit, removing redundant data, and could be a speed benefit, as you have to scan over less data in memory and transfer less data over the network.

Issue Links

• relates to: HBASE-61 [hbase] Create an HBase-specific MapFile implementation