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From Benjamin Black...@b3k.us>
Subject Re: Does the scan speed with CL.ALL is faster than CL.QUORUM and CL.ONE?
Date Wed, 25 Aug 2010 16:29:35 GMT
Did you run the tests in this order without changing anything but CL?
You may be seeing the effects of OS page caching.  Run then in the
reverse order and see if the difference persists.

On Tue, Aug 24, 2010 at 11:52 PM, ring_ayumi_king
<ring_ayumi_king@yahoo.com.tw> wrote:
> Hi all,
>
> I ran my benchmark(OPP via get_range_slices) and found the following:
> Why does the scan speed with CL.ALL is faster than CL.QUORUM and CL.ONE?
>
> CL.ONE (1k per row, Count:50000)
> scan :11095 ms
> scan per:0.2219 ms
> scan thput:4506.5347 ops/sec
>
> CL.QUORUM
> scan :11072 ms
> scan per:0.22144 ms
> scan thput:4515.896 ops/sec
>
> CL.ALL
> scan :7869 ms
> scan per:0.15738 ms
> scan thput:6354.0474 ops/sec
>
> Thanks.
>
> Shen
>
>
>
>

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