[
https://issues.apache.org/jira/browse/HBASE-18220?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16051450#comment-16051450
]
Duo Zhang commented on HBASE-18220:
-----------------------------------
I think this will be clearer?
{code}
if (get) {
this.readType = Scan.ReadType.PREAD;
this.scanUsePread = true;
} else if (isCompaction) { // How can we know this? scanType != USER_SCAN?
// always use stream read for compaction
this.readType = Scan.ReadType.STREAM;
this.scanUsePread = false;
} else {
...
}
{code}
> Compaction scanners need not reopen storefile scanners while trying to switch
> over from pread to stream
> -------------------------------------------------------------------------------------------------------
>
> Key: HBASE-18220
> URL: https://issues.apache.org/jira/browse/HBASE-18220
> Project: HBase
> Issue Type: Sub-task
> Components: Compaction
> Affects Versions: 2.0.0, 3.0.0, 2.0.0-alpha-1
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0, 3.0.0, 2.0.0-alpha-2
>
> Attachments: HBASE-18220.patch
>
>
> We try switch over to stream scanner if we have read more than a certain
> number of bytes. In case of compaction we already have stream based scanners
> only and but on calling shipped() we try to again close and reopen the
> scanners which is unwanted.
> [~Apache9]
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
