[DRBD-user] Please help with slow Replication / Syncing on debian squeeze 6.0, 8-disk RAID6

Michael Schwartzkopff misch at schwartzkopff.org
Mon Mar 12 13:25:12 CET 2012

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


> Hi folks,
> 
> I'm a DRBD newbie when it comes to administration, so please bear with
> me a for a second while describing my problem:
> 
(...)
> 
> - Dedicated gigabit link on eth1 for DRBD sync / replication, speed
> around 100MB/sec using rsync or scp.
(...)
> # drbdsetup /dev/drbd0 show
(...)
> syncer {
>         rate                    102400k; # bytes/second
(...)
> }
(...)
> /proc/drbd shows: (sorry for the line length)
> # cat /proc/drbd
> version: 8.3.7 (api:88/proto:86-91)
> srcversion: EE47D8BF18AC166BE219757
>  0: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C r----
>     ns:48504579 nr:0 dw:9541797 dr:47365371 al:2346 bm:4890 lo:1
>  pe:2770 ua:1741 ap:0 ep:1 wo:b oos:3252837352
> 
>         [>....................] sync'ed:  0.9% (3176596/3205188)M
>         finish: 57:25:48 speed: 15,604 (11,448) K/sec
(...)


Hm,

somethings do not fit together. You configured a rate of 102M (Byte/s) and 
when you ask the DRBD it tells you that your configured a rate of 11M (Byte/s)

Did your show us the /proc/drbd output of the above given config?

Greetings,

-- 
Dr. Michael Schwartzkopff
Guardinistr. 63
81375 München

Tel: (0163) 172 50 98
Fax: (089) 620 304 13
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