[DRBD-user] syncer performance problem

Lars Ellenberg Lars.Ellenberg at linbit.com
Mon Aug 2 20:41:16 CEST 2004


/ 2004-08-02 14:21:30 -0400
\ Tim Tregubov:

> so I tried upgrading to 0.7.1  as suggested.  But I'm still getting 
> 5MB/s performance...
> 
> version: 0.7.1 (api:75/proto:74)
> SVN Revision: 1479 build by root at topdog.cs.dartmouth.edu, 2004-08-02 
> 12:03:25
>  0: cs:SyncSource st:Secondary/Secondary ld:Consistent
>     ns:149232 nr:0 dw:0 dr:156000 al:0 bm:178822 lo:0 pe:503 ua:1692 
> ap:0
>         [>...................] sync'ed:  0.1% (1430355/1430498)M
>         finish: 92:28:02 speed: 4,088 (4,904) K/sec
> 
> 
> Course it's now displaying the progress of the sync correctly...  So 
> that's is fixed - cool.  But its still darn slow.
> 
> Jeff:  What kind of speeds are you getting on the 3Ware now?  It looks 
> like your setup if pretty close to mine except that I have xeons 
> instead of athlons.
> 
> My syncer rate was set at 1G but I changed it to 100M just to match 
> what you suggested.  Still the same.

(it currently is hard limited to some 50M/sec or so..., so it won't make
 a difference anyways)

just a thought:
 you use sndbuf size 1G...
 set back the sndbuf-size to the default value of 128k or even less.
 I'd like to see the differnece, if any.

	Lars Ellenberg

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