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From Kanwar Sangha <>
Subject RE: maximum storage per node
Date Thu, 25 Jul 2013 15:51:25 GMT
Issues with large data nodes would be -

*         Nodetool repair will be impossible to run

*         Your read i/o will suffer since you will almost always go to disk (each read will
take 3 IOPS worst case)

*         Boot-straping the node in case of failures will take days/weeks

From: Pruner, Anne (Anne) []
Sent: 25 July 2013 10:45
Subject: RE: maximum storage per node

We're storing fairly large files (about 1MB apiece) for a few months and then deleting the
oldest to get more space to add new ones.  We have large requirements (maybe up to 100 TB),
so having a 1TB limit would be unworkable.

What is the reason for the limit?  Does something fail after that?

If there are hardware issues, what's recommended?

BTW, we're using Cassandra 1.2


From: cem []
Sent: Thursday, July 25, 2013 11:41 AM
Subject: Re: maximum storage per node

Between 500GB - 1TB is recommended.

But it depends also your hardware, traffic characteristics and requirements. Can you give
some details on that?

Best Regards,

On Thu, Jul 25, 2013 at 5:35 PM, Pruner, Anne (Anne) <<>>
Does anyone have opinions on the maximum amount of data reasonable to store on one Cassandra
node?  If there are limitations, what are the reasons for it?


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