From:

http://www.datastax.com/docs/1.2/cluster_architecture/cluster_planning

  • RAID on data disks: It is generally not necessary to use RAID for the following reasons:

  • RAID on the commit log disk: Generally RAID is not needed for the commit log disk. Replication adequately prevents data loss. If you need the extra redundancy, use RAID 1.



    Andy

    On 24 Jul 2013, at 15:36, Jan Algermissen <jan.algermissen@nordsc.com> wrote:

    Hi,

    second question:

    is it recommended to set up Cassandra using 'RAID-ed' disks for per-node reliability or do people usually just rely on having the multiple nodes anyway - why bother with replicated disks?

    Jan


  • The University of Dundee is a registered Scottish Charity, No: SC015096