On Mon, Dec 24, 2012 at 9:27 AM, Varun Sharma <[email protected]> wrote:
> Hi, > > I am wondering where people usually place hbase + hadoop logs. I have 4 > disks and 1 very tiny disk with barely 500 megs (thats the typical setup on > amazon ec2). The 4 disks shall be used for hbase data. Since 500M is too > small, should I place logs on one of the 4 disks. Could it potentially > steal IOP(s) from hbase ? Does anyone have an idea how much of an overhead > logging really is ? > Looks like you have no choice but to put your logging on a data disk. Logging can be expensive, yes. It should be easy enough to measure in your setup. You can disable all logging for a short period while the cluster is under load; do it on a single node even (you can do this from the UI). See how your io changes when logging is off. St.Ack
