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From mobiledream...@gmail.com
Subject Re: one server or more servers?
Date Wed, 15 Jul 2009 22:33:08 GMT
Mark and Jonathan
I have started cassandra on 4 servers with all 4 of them as seeds

how do i know all 4 are now part of the datastore

are there ways to test this

thanks a lot

On Tue, Jul 14, 2009 at 8:30 AM, Mark Robson <markxr@gmail.com> wrote:

> 2009/7/14 <mobiledreamers@gmail.com>
>
>> *1. If you only have 3 production servers, Cassandra may not do much for
>> you. You will probably only care if you have lots more servers. 3 servers is
>> a reasonable minimum for a test / dev environment*
>> At How many servers does cassandra start really performing?
>> or how many servers is an ideal setup say for a game 10?
>>
>
> It can use any number, three is probably a reasonable minimum, I don't know
> what the maximum is.
>
> If you have a small number of servers, there is probably no reason to use
> Cassandra; you can more usefully use a conventional database with
> replication or sharding.
>
> The reason you might want to use Cassandra is to scale writes a lot, to
> levels you couldn't reach with more "conventional" databases.
>
> In all likelihood, an application would use Cassandra to store high-volume
> high-write data alongside a more conventional database to store smaller,
> less frequently changing stuff.
>
> It appears to me that Cassandra 0.3 is only really useful if running on a
> homogenous cluster of dedicated servers with reasonable amounts of memory /
> storage (But not necessarily high spec servers of CPU, IO speed or internal
> redundancy).
>
> Once the load balancing is implemented in 0.5 (according to current plans)
> it will become more useful for heterogenous environments.
>
> Mark
>



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