[HBASE-6798] HDFS always read checksum form meta file

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Duplicate
• Affects Version/s: 0.94.0, 0.94.1
• Component/s: Performance
• Assignee: Unassigned
• Reporter: LiuLei
• Created: 17/Sep/12 02:40
• Updated: 14/Jun/22 18:00
• Resolved: 19/Sep/12 20:17

Description

I use hbase0.941 and hadoop-0.20.2-cdh3u5 version.

The HBase support checksums in HBase block cache in HBASE-5074 jira.
The HBase support checksums for decrease the iops of HDFS, so that HDFS
dont't need to read the checksum from meta file of block file.
But in hadoop-0.20.2-cdh3u5 version, BlockSender still read the metadata file even if the
hbase.regionserver.checksum.verify property is ture.

Issue Links

• is blocked by: HBASE-6868 Skip checksum is broke; are we double-checksumming by default?
• is blocked by: HDFS-3429 DataNode reads checksums even if client does not need them