[jira] [Commented] (HBASE-15844) We should respect hfile.block.index.cacheonwrite when write intermediate index Block

["Heng Chen (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-15844?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15358315#comment-15358315 ] 

Heng Chen commented on HBASE-15844:
-----------------------------------

And more thoughts,  i think we should cache root index block when write by default. Currently it seems not do this work

{code: title=BlockIndexWriter#writeIndexBlocks}
  // write the root level
      long rootLevelIndexPos = out.getPos();

      {
        DataOutput blockStream =
            blockWriter.startWriting(BlockType.ROOT_INDEX);
        rootChunk.writeRoot(blockStream);
        if (midKeyMetadata != null)
          blockStream.write(midKeyMetadata);
        blockWriter.writeHeaderAndData(out);
      }

{code}



> We should respect hfile.block.index.cacheonwrite when write intermediate index Block
> ------------------------------------------------------------------------------------
>
>                 Key: HBASE-15844
>                 URL: https://issues.apache.org/jira/browse/HBASE-15844
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Heng Chen
>             Fix For: 2.0.0
>
>         Attachments: HBASE-15844.patch
>
>
> {code: title=BlockIndexWriter#writeIntermediateBlock}
>       if (cacheConf != null) {
>         HFileBlock blockForCaching = blockWriter.getBlockForCaching(cacheConf);
>         cacheConf.getBlockCache().cacheBlock(new BlockCacheKey(nameForCaching,
>           beginOffset, true, blockForCaching.getBlockType()), blockForCaching);
>       }
> {code}
> The if condition should be ?
> {code}
> if (cacheConf != null && cacheConf.shouldCacheIndexesOnWrite()) 
> {code} 



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