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From Dmitriy Setrakyan <dsetrak...@apache.org>
Subject Re: Performance issue with REPLICATED cache
Date Tue, 27 Oct 2015 22:49:06 GMT
On Tue, Oct 27, 2015 at 3:03 PM, Yury Lazouski <yury_lazouski@epam.com>
wrote:

> Hi,
> haven't got a chance to create project yet, but will do however I moved
> forward in investigation - I found out that positive cache lookups are
> happening in 0-2 μs while negative (value is absent in cache) - >10 μs on
> single node cache and ~150 μs!!!  on 2-node cluster when data is read
> locally!! Same positive lookups on 2-node cluster happen within the same
> 0-2
> μs.
>

Yuri, 150 μs probably sounds reasonable for a network trip (even over a
loopback socket). However, I am not sure why you even have network trips,
considering that you are using REPLICATED caches. Shouldn’t all the data be
available locally?


>
> Please let me know if it sounds like I miss something obvious otherwise I
> will try to create simplified project to demonstrate this.
>
> Thanks,
> Yuri
>
>
>
> --
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>

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