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From Carlos Alvarez <cbalva...@gmail.com>
Subject Re: Cassandra on Windows network latency
Date Thu, 29 Apr 2010 13:03:26 GMT
Are you using TSocket in the client?. If yes, use TbufferedTransport instead.


Carlos

On 4/29/10, Viktor Jevdokimov <Viktor.Jevdokimov@adform.com> wrote:
> Thrift C# sources, thrift generated Cassandra sources, test app built with
> C#. Simple connect/write/read operations. No pooling or anything else.
>
> From: Heath Oderman [mailto:heath@526valley.com]
> Sent: Thursday, April 29, 2010 2:17 PM
> To: user@cassandra.apache.org
> Subject: Re: Cassandra on Windows network latency
>
> I learned the hard way, that running py_stress in the src/contrib directory
> is a great way to test what kind of speeds you are really getting.
>
> What tools / client are you using to test to get the 200ms number?
>
> stu
> On Thu, Apr 29, 2010 at 7:12 AM, Viktor Jevdokimov
> <Viktor.Jevdokimov@adform.com<mailto:Viktor.Jevdokimov@adform.com>> wrote:
> Hi all,
>
> We have installed Cassandra on Windows and found that with any number of
> Cassandra (single, or 3 node cluster) on Windows Vista or Windows Server
> 2008, 32 or 64 bit, with any load or number of requests we, have:
>
> When client and server are on the same machine, connect/read/write latencies
> ~0-1ms
> When client on another machine, same network, on the same switch, connection
> latency 0-1ms (as a ping), read/write latencies >=200ms.
>
> What causes 200ms latency accessing Cassandra on Windows through network?
> Does anybody experience such behavior?
>
> Cassandra 0.6.1
> Java SE 6 u20
>
>
> Best regards,
> Viktor
>
>
>

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