[DRBD-user] DRBD - Slow Performance

[Dan Lavu]

Digi,

I tried what you suggested, and set the syncer rate to 30M but I'm still
not syncing past 2MB/s. 

Do you have any other ideas? 

version: 8.3.2 (api:88/proto:86-90)
GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by
mockbuild at v20z-x86-64
.home.local, 2009-08-29 14:07:55
 0: cs:SyncTarget ro:Secondary/Primary ds:Inconsistent/UpToDate C r----
    ns:0 nr:358080 dw:358080 dr:0 al:0 bm:21 lo:1 pe:4047 ua:0 ap:0 ep:1
wo:b oos
:2399055968
        [>....................] sync'ed:  0.1% (2342828/2343176)M
        finish: 312:22:37 speed: 2,124 (2,000) K/sec

Thanks in advance. 

Dan Lavu


-----Original Message-----
From: drbd-user-bounces at lists.linbit.com
[mailto:drbd-user-bounces at lists.linbit.com] On Behalf Of Digimer
Sent: Monday, February 15, 2010 11:42 AM
To: Dan Lavu
Cc: drbd-user at lists.linbit.com
Subject: Re: [DRBD-user] DRBD - Slow Performance

Dan Lavu wrote:
> ###############################################
> 
> version: 8.3.2 (api:88/proto:86-90)
> 
> GIT-hash: dd7985327f146f33b86d4bff5ca8c94234ce840e build by 
> mockbuild at v20z-x86-64.home.local, 2009-08-29 14:07:55
> 
>  0: cs:SyncSource ro:Primary/Secondary ds:UpToDate/Inconsistent C
r----
> 
>     ns:11050876 nr:0 dw:0 dr:11059127 al:0 bm:674 lo:1 pe:4 ua:253
ap:0 
> ep:1 wo:b oos:2388363296
> 
>         [>....................] sync'ed:  0.5% (2332384/2343176)M
> 
>         finish: 362:48:56 speed: 1,824 (1,908) K/sec
> 
> ###############################################

The sync operation is not designed to go at max speed, as the array is 
totally usable while not sync'ed. If you know that you're not needing 
the bandwidth for other disk apps and want to increase the speed of the 
sync, either (temporarily) add:

common {
	# Your other vars plus...
         syncer { rate 33M; }
}

You can increase that to whatever you want. There is also a command-line

call to temporarily up the sync rate as well, though it's syntax escapes

me just now.

Digi
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