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From Philippe <watche...@gmail.com>
Subject Re: What sort of load do the tombstones create on the cluster?
Date Mon, 21 Nov 2011 08:30:53 GMT
I don't remember your exact situation but could it be your network
connectivity?
I know I've been upgrading mine because I'm maxing out fastethernet on a 12
node cluster.
Le 20 nov. 2011 22:54, "Jahangir Mohammed" <md.jahangir27@gmail.com> a
écrit :

> Mostly, they are I/O and CPU intensive during major compaction. If ganglia
> doesn't have anything suspicious there, then what is performance loss ?
> Read or write?
> On Nov 17, 2011 1:01 PM, "Maxim Potekhin" <potekhin@bnl.gov> wrote:
>
>> In view of my unpleasant discovery last week that deletions in Cassandra
>> lead to a very real
>> and serious performance loss, I'm working on a strategy of moving forward.
>>
>> If the tombstones do cause such problem, where should I be looking for
>> performance bottlenecks?
>> Is it disk, CPU or something else? Thing is, I don't see anything
>> outstanding in my Ganglia plots.
>>
>> TIA,
>>
>> Maxim
>>
>>

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