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From Prem Yadav <>
Subject Re: Cassandra Disk storage capacity
Date Mon, 07 Apr 2014 11:14:34 GMT
you can specify multiple data directories in cassandra.yaml.
  - /var/lib.cass1
  - /var/lib/cass2

On Mon, Apr 7, 2014 at 12:10 PM, Jan Kesten <> wrote:

>  Hi Hari,
> C* will use your entire space - that is something one should monitor.
> Depending on your choose on compaction strategy your data_dir should not be
> filled up entirely - in the worst case compaction will need space as large
> as the sstables on disk, therefore 50% should be free space.
> The parameters used for on disk storage are commitlog_directory and
> data_file_directories and saved_caches_directory. The paramter
> data_file_directories is in plural, you can easily put more than one
> directory here (and you should do this instead of using RAID).
> Cheers,
> Jan
> Am 07.04.2014 12:56, schrieb Hari Rajendhran:
> Hi Team,
>  We have a 3 node Apache cassandra 2.0.4 setup installed in our lab
> setup.We have set data directory to /var/lib/cassandra/data.What would be
> the maximum
> disk storage that will be used for cassandra data storage.
>  Note : /var partition has a storage capacity of 40GB.
>  My question is whether cassandra will  the entire / directory for data
> storage ?
> If no, how to specify multiple directories for data storage ??
> Best Regards
> Hari Krishnan Rajendhran
> Hadoop Admin
> DESS-ABIM ,Chennai BIGDATA Galaxy
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