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From Bill de hÓra <b...@dehora.net>
Subject Re: Indexes and hard disk
Date Sat, 12 Feb 2011 12:56:04 GMT
On Fri, 2011-02-11 at 23:24 -0800, mcasandra wrote:

> Are indexes supported in Cassandra? If yes then what kind? Also, if it's
> supported then please point me to the place that give more information about
> it.



Secondary Indexes:

<http://www.datastax.com/dev/blog/whats-new-cassandra-07-secondary-indexes>
<http://pycassa.github.com/pycassa/tutorial.html#indexes>


> Are there any kind of hard disk in particular recommended by Cassandra? We
> generally get only 500GB hard disks on our virtual machines. But I read that
> it's better to have 2TB HDD.


Hardware:

<http://wiki.apache.org/cassandra/CassandraHardware>
<http://www.mail-archive.com/user@cassandra.apache.org/msg06838.html>
<http://www.bitplumber.net/2010/10/a-cassandra-hardware-stack-dell-c1100s-ocz-vertex-2-ssds-with-sandforce-arista-7048s/>
<http://blog.kosmix.com/2011/01/21/cassandra-on-ssd/>

There's no replacement for understanding your application's workload and
the properties of the underlying hardware/vm and jvm you're being
supplied with (assuming you have a say in hardware selection). Cassandra
can run on pretty much anything, but the anything you get might not be
optimal for your app, which means you will have to tune the App and
Cassandra, or get different kit.

Bill

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