-Re: Where to place logs
Varun Sharma 2012-12-28, 08:51
Thanks for the tip. I was just wondering what people have done in the past
- do people typically reserve a separate disk for logging activity ?
On Wed, Dec 26, 2012 at 1:13 PM, Stack <[EMAIL PROTECTED]> wrote:
> 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
> > 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
> > 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.