[DRBD-user] Identifying High iowait on DRBD Computers

Dan Frincu df.cluster at gmail.com
Thu Feb 17 11:57:05 CET 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


On Thu, Feb 17, 2011 at 12:29 PM, Florian Haas <florian.haas at linbit.com>wrote:

> On 2011-02-17 07:41, Robinson, Eric wrote:
> > While performing a resync, iostat shows that nodeA (primary) is doing
> > almost all reads while nodeB (secondary) is doing almost all writes,
> > which is expected. However, I'm trying to see the names of the processes
> > that are doing the reading and writing.
>
> iotop? "aptitude install iotop" on Debian/Ubuntu boxes.
>

Or get it from http://guichaz.free.fr/iotop/ and make sure you have Python ≥
2.5 (or Python ≥ 2.4 with the ctypes module) and a Linux kernel ≥ 2.6.20
with the TASK_DELAY_ACCT CONFIG_TASKSTATS, TASK_IO_ACCOUNTING and
CONFIG_VM_EVENT_COUNTERS options on.

HTH


> Cheers,
> Florian
>
>
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>


-- 
Dan Frincu
CCNA, RHCE
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