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https://issues.apache.org/jira/browse/HBASE-21874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16921582#comment-16921582
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Josh Elser edited comment on HBASE-21874 at 9/3/19 5:14 PM:
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{quote}I had submitted a patch with this change to branch-2.2. If the
pre-commit checks for this branch-2.2 patch are ok, would anyone oppose having
this backported to branch-2.2?{quote}
No complaints from me on this, but I think it would be better to do this
backport in a new issue rather than reopening this one as you have.
was (Author: elserj):
{quote}I had submitted a patch with this change to branch-2.2. If the
pre-commit checks for this branch-2.2 patch are ok, would anyone oppose having
this backported to branch-2.2?\{quote}
No complaints from me on this, but I think it would be better to do this
backport in a new issue rather than reopening this one as you have.
> Bucket cache on Persistent memory
> ---------------------------------
>
> Key: HBASE-21874
> URL: https://issues.apache.org/jira/browse/HBASE-21874
> Project: HBase
> Issue Type: New Feature
> Components: BucketCache
> Affects Versions: 3.0.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Priority: Major
> Fix For: 3.0.0, 2.3.0
>
> Attachments: HBASE-21874.branch-2.2.001.patch, HBASE-21874.patch,
> HBASE-21874.patch, HBASE-21874_V2.patch, HBASE-21874_V4.patch,
> HBASE-21874_V5.patch, HBASE-21874_V6.patch, Pmem_BC.png
>
>
> Non volatile persistent memory devices are byte addressable like DRAM (for
> eg. Intel DCPMM). Bucket cache implementation can take advantage of this new
> memory type and can make use of the existing offheap data structures to serve
> data directly from this memory area without having to bring the data to
> onheap.
> The patch is a new IOEngine implementation that works with the persistent
> memory.
> Note : Here we don't make use of the persistence nature of the device and
> just make use of the big memory it provides.
> Performance numbers to follow.
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