[DRBD-user] Slow Read performance

Maxim Ianoglo dotnox at gmail.com
Mon May 2 15:35:01 CEST 2011

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


No. This is output of DRBD state while performing test reading by bonnie++ (
after test writin )

There is no any "oos" data.

[root at srv04 ~]$ cat /proc/drbd
version: 8.3.10 (api:88/proto:86-96)
GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by
root at srv04.initalia.com, 2011-04-29 12:14:44
 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
    ns:0 nr:50388716 dw:50388716 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1
wo:d oos:0
[root at srv04 ~]$ cat /proc/drbd
version: 8.3.10 (api:88/proto:86-96)
GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by
root at srv04.initalia.com, 2011-04-29 12:14:44
 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
    ns:0 nr:50388716 dw:50388716 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1
wo:d oos:0
[root at srv04 ~]$ cat /proc/drbd
version: 8.3.10 (api:88/proto:86-96)
GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by
root at srv04.initalia.com, 2011-04-29 12:14:44
 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
    ns:0 nr:50388728 dw:50388728 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1
wo:d oos:0
[root at srv04 ~]$ cat /proc/drbd
version: 8.3.10 (api:88/proto:86-96)
GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by
root at srv04.initalia.com, 2011-04-29 12:14:44
 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
    ns:0 nr:50388728 dw:50388728 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1
wo:d oos:0
[root at srv04 ~]$ cat /proc/drbd
version: 8.3.10 (api:88/proto:86-96)
GIT-hash: 5c0b0469666682443d4785d90a2c603378f9017b build by
root at srv04.initalia.com, 2011-04-29 12:14:44
 0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
    ns:0 nr:50388728 dw:50388728 dr:220 al:0 bm:2 lo:0 pe:0 ua:0 ap:0 ep:1
wo:d oos:0

--
Maxim Ianoglo


On Mon, May 2, 2011 at 2:59 PM, Bart Coninckx <bart.coninckx at telenet.be>wrote:

> Because it is syncing?
>
>
> On 05/02/11 13:45, Maxim Ianoglo wrote:
>
>> Hi,
>>
>> Anyway, why I get so big performance difference between ?
>> On DRBD device with Secondary DRBD host connected: ~80MB/s Read and
>> ~340MB/s Write
>> On DRBD without Secondary DRBD host connected: ~245MB/s Read and ~340Write
>>
>> Thank you.
>> --
>> Maxim Ianoglo
>>
>>
>>
>> _______________________________________________
>> drbd-user mailing list
>> drbd-user at lists.linbit.com
>> http://lists.linbit.com/mailman/listinfo/drbd-user
>>
>
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