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From Ryan Rawson <ryano...@gmail.com>
Subject Re: Random Reads throughput/performance
Date Fri, 24 Jun 2011 22:40:53 GMT
If you are defeating caching you will want to patch in HDFS-347.

Good luck!


On Fri, Jun 24, 2011 at 3:25 PM, Sateesh Lakkarsu <lakkarsu@gmail.com> wrote:
> block cache was at default 0.2%, the id's being looked up don't repeat and
> each one has a lot of versions, so not expecting cache hits - also was
> seeing a lot of cache evictions as is. Can we get better performance in such
> a scenario?
>
> Does having more discs help? or would RS be the bottleneck?
>
> Lohit:
> Without compression, I think we were seeing 300+ - that was with default
> config
> Memory for RS is 4GB and DataNode at 1G
>

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