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https://issues.apache.org/jira/browse/HBASE-8322?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13630750#comment-13630750
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Enis Soztutar commented on HBASE-8322:
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My understanding of this is, on write path, you will always to compute
checksums twice if you enable the feature (which is fine). On read path, if
hadoop1 and non-local reads, you will checksum twice. Otherwise it will
checksum only once.
bq. What if folks have a separate HDFS and HBase clusters (not that that would
make sense, but I think some folks have this)?
What do you mean by having separate clusters? We are not disabling checksums
from the hdfs configuration in any case, right?
> Re-enable hbase checksums by default
> ------------------------------------
>
> Key: HBASE-8322
> URL: https://issues.apache.org/jira/browse/HBASE-8322
> Project: HBase
> Issue Type: Improvement
> Components: Filesystem Integration
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Fix For: 0.98.0, 0.95.1
>
> Attachments: hbase-8322_v1.patch
>
>
> Double checksumming issues in HBase level checksums(HBASE-5074) has been
> fixed in HBASE-6868. However, that patch also disables hbase checksums by
> default. I think we should re-enable it by default, and document the
> interaction with shortcircuit reads.
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