incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Peter Schuller <>
Subject Re: commodity server spec
Date Sat, 03 Sep 2011 08:08:45 GMT
> Is there any recommendation about commodity server hardware specs if 100TB
> database size is expected and its heavily write application.
> Should I got with high powered CPU (12 cores) and 48TB HDD and 640GB RAM and
> total of 3 servers of this spec. Or many smaller commodity servers are
> recommended?

In general, more smaller is better than fewer big. Probably go for
what's cost-effective.

In your case, 100 TB is *quite* big. I would definitely recommend
against doing anything like your 3 server setup. You'll probably want
100-1000 small servers.

The exception to that would be if you're truly only caring about
writes and have *very* few reads that are not latency critical (so
you're okay with waiting for several disk seeks on reads and the
number of reads is low enough that serving them from platters will
work). In such cases it might make sense to have fewer Big Fat
Machines with lots of memory and a lot of disk space. But... even so.
I would not recommend huge 48 tb nodes... unless you really know what
you're doing.

In reality, more information about your use-case would be required to
offer terribly useful advice.

/ Peter Schuller (@scode on twitter)

View raw message