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From Paul Prescod <p...@prescod.net>
Subject Re: Worst case #iops to read a row
Date Tue, 13 Apr 2010 19:21:40 GMT
On Tue, Apr 13, 2010 at 12:00 PM, Benjamin Black <b@b3k.us> wrote:
>> I am probably being totally naive, but is the answer to the question
>> "worst iops on read" just:
>>
>>  3 reads per SSTable * 4 SStables * ReplicationFactor ?
>>
>> = 3 * 4 * 3 = 36?
>>
>
> Why does RF enter this?

A simplistic model for a consistent read that is asking all replicas
what their value is for the key. If the key is in the fourth SSTable
of all nodes, won't they all have to do 12 IOPs to find it?

 Paul Prescod

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