> If I have a data in column of size 500KB, > Also some information here http://thelastpickle.com/2011/04/28/Forces-of-Write-and-Read/
The data files are memory mapped so it's sort of OS dependant. A ----------------- Aaron Morton Freelance Cassandra Consultant New Zealand @aaronmorton http://www.thelastpickle.com On 21/06/2013, at 8:29 AM, Shahab Yunus <[email protected]> wrote: > Ok. Though the closest that I can find is this (Aaron Morton's great blog): > http://thelastpickle.com/2011/07/04/Cassandra-Query-Plans/ > > I would also like to know the answer as, as such, I also haven't came across > 'block size' as a core concept (or a concept to be considered while > developing with) Cassandra unlike Hadoop. > > Regards, > Shahab > > > On Thu, Jun 20, 2013 at 3:38 PM, Kanwar Sangha <[email protected]> wrote: > Yes. Is that not specific to hadoop with CFS ? I want to know that If I have > a data in column of size 500KB, how many IOPS are needed to read that ? > (assuming we have key cache enabled) > > > > > > From: Shahab Yunus [mailto:[email protected]] > Sent: 20 June 2013 14:32 > To: [email protected] > Subject: Re: block size > > > > Have you seen this? > > http://www.datastax.com/dev/blog/cassandra-file-system-design > > > > Regards, > Shahab > > > > On Thu, Jun 20, 2013 at 3:17 PM, Kanwar Sangha <[email protected]> wrote: > > Hi – What is the block size for Cassandra ? is it taken from the OS defaults ? > > > >
