[DRBD-user] the perfomance issuce with a physical volume synchronization

Lars Ellenberg lars.ellenberg at linbit.com
Mon May 23 13:52:18 CEST 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 Mon, May 23, 2011 at 07:44:08PM +0900, Junko IKEDA wrote:
> Hi,
> 
> It seems that LVM2 included in RHEL 5 has same problems,
> so we run the same test on RHEL 6.1.
> in this case, DRBD was trapped in I/O error.

"trapped in I/O error" is supposed to mean what, in this context?
Can you elaborate or rephrase?

> Does DRBD support "merge fn"?
> I heard that device-mapper on RHEL 6 cut I/O down to page size if the
> low level block device didn't support cut down.

DRBD does support, and implements, a bio_merge_bvec_fn.

-- 
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com

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