Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Tue, Dec 29, 2009 at 03:56:17PM -0700, Josh Aune wrote:
> Hi,
>
> Attached is a patch for the users guide.
Thanks.
> Also, I'm having an issue with sync performance. I have DRBD setup
> between two hosts using SRP.
SDP maybe?
> Under optimal conditions I'm able to achieve a 500+ MB/s write speed,
How do you measure?
> but during the initial sync after the DRBD device is created the sync
> proceeds at less than 100 MB/s. Below is the config file. Am I
> missing anything needed to bump up the initial sync speed?
>
> Also, all bytes on the drives on both side are zeros, so the limitation seems to be in the crc32c processing.
Did you look at top, vmstat or similar?
> Thanks,
> Josh
>
> common {
> protocol C;
> disk {
> no-disk-flushes;
> no-md-flushes;
> }
> net {
> allow-two-primaries;
> }
> syncer {
> rate 800M;
> csums-alg crc32c;
> verify-alg crc32c;
> }
> startup {
> become-primary-on both;
> }
> }
> resource fioa {
> on l1 {
> address sdp 192.168.0.1:7789;
> device /dev/drbd1;
> disk /dev/fioa;
> meta-disk internal;
> }
> on l2 {
> address sdp 192.168.0.2:7789;
> device /dev/drbd1;
> disk /dev/fioa;
> meta-disk internal;
> }
> }
>
>
>
> CONFIDENTIAL
>
> This document and attachments contain information from Fusion-io, Inc. which is confidential and/or legally privileged.
Oh, not really... ;-)
--
: Lars Ellenberg
: LINBIT | Your Way to High Availability
: DRBD/HA support and consulting http://www.linbit.com
DRBD® and LINBIT® are registered trademarks of LINBIT, Austria.
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