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From "Jingcheng Du (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15338) Add a option to disable the data block cache for testing the performance of underlying file system
Date Fri, 26 Feb 2016 06:04:18 GMT

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Jingcheng Du commented on HBASE-15338:
--------------------------------------

Agree with [~anoopsamjohn].
Most of the cache settings can be set by Configuration in CacheConfig. The cache on read can
be disabled in Get/Scan.
Is this enough? Otherwise, is it ok to just make the cache on read configurable? Or use 0
as the block cache size for that RS/HM?

> Add a option to disable the data block cache for testing the performance of underlying
file system
> --------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-15338
>                 URL: https://issues.apache.org/jira/browse/HBASE-15338
>             Project: HBase
>          Issue Type: Improvement
>          Components: integration tests
>            Reporter: Liu Shaohui
>            Assignee: Liu Shaohui
>            Priority: Minor
>         Attachments: HBASE-15338-trunk-v1.diff
>
>
> When testing and comparing the performance of different file systems(HDFS, Azure blob
storage, AWS S3 and so on) for HBase, it's better to avoid the affect of the HBase BlockCache
and get the actually random read latency when data block is read from underlying file system.
(Usually, the index block and meta block should be cached in memory in the testing).
> So we add a option in CacheConfig to disable the data block cache.
> Suggestions are welcomed~ Thanks



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