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https://issues.apache.org/jira/browse/HBASE-12295?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14627559#comment-14627559
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ramkrishna.s.vasudevan commented on HBASE-12295:
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bq.Let me come back to this again. Is it up in RB?
Ya. The patch is in RB.
bq.T deserialize(ByteBuffer b, boolean reuse, Type memType) throws IOException;
This CacheableDeserializer is the one creating the Cacheable. So we cannot
pass a Cacheable there I think.
bq.Should Type be MemoryType enum?
We can make it MemoryType.
bq.Out of interest, server-side, how many Interfaces and abstract classes might
a Cell implementation be implementing now?
bq.Nit: SharedMemoryBackedCell should be SharedMemoryCell ?
Okie.
Keyvalue, NoTagsKeyValue, SharedMemoryCell, the different fake keys, Prefix
Tree cells, the DBE cells. The last two will have two variants one with byte[]
backed and other with BB backed.
> Prevent block eviction under us if reads are in progress from the BBs
> ---------------------------------------------------------------------
>
> Key: HBASE-12295
> URL: https://issues.apache.org/jira/browse/HBASE-12295
> Project: HBase
> Issue Type: Sub-task
> Components: regionserver, Scanners
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Fix For: 2.0.0
>
> Attachments: HBASE-12295.pdf, HBASE-12295_1.patch, HBASE-12295_1.pdf,
> HBASE-12295_10.patch, HBASE-12295_12.patch, HBASE-12295_2.patch,
> HBASE-12295_4.patch, HBASE-12295_4.pdf, HBASE-12295_5.pdf,
> HBASE-12295_9.patch, HBASE-12295_trunk.patch
>
>
> While we try to serve the reads from the BBs directly from the block cache,
> we need to ensure that the blocks does not get evicted under us while
> reading. This JIRA is to discuss and implement a strategy for the same.
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