[
https://issues.apache.org/jira/browse/HBASE-15482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16241965#comment-16241965
]
Xiang Li commented on HBASE-15482:
----------------------------------
Hi [~liyintang], [~davelatham]
I planned to provide an option (the key is like
"hbase.TableSnapshotInputFormat.locality", default to true)
And in TableSnapshotInputFormat.TableSnapshotRegionSplit#getLocations()
{code}
if option is true // care locality
return delegate.getLocations();
else
return new String[0];
{code}
Is it the right way to go?
> Provide an option to skip calculating block locations for SnapshotInputFormat
> -----------------------------------------------------------------------------
>
> Key: HBASE-15482
> URL: https://issues.apache.org/jira/browse/HBASE-15482
> Project: HBase
> Issue Type: Improvement
> Components: mapreduce
> Reporter: Liyin Tang
> Assignee: Xiang Li
> Priority: Minor
>
> When a MR job is reading from SnapshotInputFormat, it needs to calculate the
> splits based on the block locations in order to get best locality. However,
> this process may take a long time for large snapshots.
> In some setup, the computing layer, Spark, Hive or Presto could run out side
> of HBase cluster. In these scenarios, the block locality doesn't matter.
> Therefore, it will be great to have an option to skip calculating the block
> locations for every job. That will super useful for the Hive/Presto/Spark
> connectors.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
