Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Wed, 6 Apr 2005, Felix Ide wrote:
> we also had severe performace problems with drbd 0.7 and 3ware
> Controllers (3ware 7500 with RAID5). I sent a description to the list
> twice but no one could help me (got no answers :( )
>
> http://lists.linbit.com/pipermail/drbd-user/2005-January/002466.html
>
> So we decided to stay with 0.6...
Hmm, yeah, I dropped back to 2.4.27 with DRBD 0.6.12:
1: cs:SyncingAll st:Primary/Secondary ns:18846540 nr:0 dw:0 dr:18846540 pe:766 ua:0
[=>..................] sync'ed: 7.6% (225735/244140)M
finish: 0:59:35h speed: 65,748 (60,021) K/sec
It's a lot smaller array (didn't take the time to figure out how large it
was), but that's a *lot* better sync speed.
Installed drbd 0.7 on the same kernel, set up the mirror, and I get:
0: cs:SyncSource st:Primary/Secondary ld:Consistent
ns:160428 nr:0 dw:0 dr:176812 al:0 bm:27462 lo:0 pe:1070 ua:4096 ap:0
[>...................] sync'ed: 0.1% (439106/439259)M
finish: 22:39:48 speed: 5,472 (5,384) K/sec
So, a few questions:
1) Any idea why this is? Is there any debugging I can do to help? (These
boxes aren't live, but will be in a week or so.)
2) If there isn't an immediate fix for this, what should I do for my 0.6
install to make it easier to move to 0.7 when this problem is figured out?
--
Nate Carlson <natecars at real-time.com> | Phone : (952)943-8700
http://www.real-time.com | Fax : (952)943-8500