[DRBD-user] Slow sync rate on 0.7.11 & Fedora

Norbert Langermann norbert at langermann.net
Fri Oct 28 14:10:03 CEST 2005

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



--On Donnerstag, 27. Oktober 2005 09:25 -0500 Tony McCallie 
<TonyMcCallie at tfchurch.org> wrote:

> [root at creativetest2 ~]# cat /proc/drbd
> version: 0.7.11 (api:77/proto:74)
> SVN Revision: 1807 build by bachbuilder at g39.physik.fu-berlin.de,
> 2005-09-30 12:11:16
>  0: cs:SyncTarget st:Secondary/Primary ld:Inconsistent
>     ns:0 nr:19091224 dw:19091224 dr:0 al:0 bm:12847 lo:0 pe:2556 ua:0
> ap:0
>         [=>..................] sync'ed: 10.0% (168266/186909)M
>         finish: 179:29:02 speed: 252 (288) K/sec
>
> The only thing I can see in the syslogs that looks like a problem is
> from heartbeat:
>
> (repeated many times)
> heartbeat[27637]: 2005/10/27_09:24:32 WARN: 1 lost packet(s) for
> [creativetest1.int-tfchurch.org] [93:95]
> heartbeat[27637]: 2005/10/27_09:24:32 info: No pkts missing from
> creativetest1.int-tfchurch.org!

I had similar problems with drbd. The problem was, that the on-board SATA 
controller and the NIC used the same interrupt, and for some reason the 
SATA controller generated interrupts at about 15000/s. As soon as we 
disconnected the harddrive everything worked fine.
You should have a look at the number of interrupts generated on the IRQ 
line used by the drbd NIC (cat /proc/interrupts), perhaps it is something 
similar.

Regards
Norbert
-- 
Norbert Langermann
norbert at langermann.net
OpenPGP-Key 0x51431418

Verschränkung ist, wenn man das eine Teilchen kitzelt und das andere lacht.



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