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drbd-user: Re: [DRBD-user] DRBD is deadly slow.

Re: [DRBD-user] DRBD is deadly slow.

From: James Perry <jperry_at_nospam>
Date: Tue Mar 30 2010 - 13:48:07 GMT
To: PN <poknam@gmail.com>

Read this!

http://www.drbd.org/users-guide/s-configure-syncer-rate.html

On Mar 30, 2010, at 8:35 AM, PN wrote:

Try to increase the syncer rate to a much higher number and restart DRBD on both nodes will definitely help to increase the sync speed.

PN

2010/3/30 Balreddy Medipally <balreddy.m@imimobile.com<mailto:balreddy.m@imimobile.com>>
 Hi All,

       I am running DRBD 8.3.0 on RedHat Enterprise Linux AS 4.8 64-bit
OS for production purpose. MySQL works superfast in when load was not
there, when load was there it become deadly slow. Can any one please
help me to make it faster.

Here is my drbd.conf file.

[root@imi-drbd1 ~]# cat /etc/drbd.conf
resource drbd0 {
protocol C;
startup {
become-primary-on both;
}
net {
allow-two-primaries;
cram-hmac-alg sha256;
shared-secret DRBD2KVM123456;
after-sb-0pri discard-least-changes;
after-sb-1pri violently-as0p;
after-sb-2pri violently-as0p;
rr-conflict violently;
}
syncer {
rate 44M;
}

on imi-drbd1 {
        device /dev/drbd0;
        disk /dev/sda2;
        address ipv4 192.168.168.1:7768<http://192.168.168.1:7768/>;
        meta-disk internal;
}
on imi-drbd2 {
        device /dev/drbd0;
        disk /dev/sda2;
        address ipv4 192.168.168.2:7768<http://192.168.168.2:7768/>;
        meta-disk internal;
       }
}
[root@imi-drbd1 ~]#

Thanks,
BalReddy.
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-- Best Regards, PN Lai Storage Manager / HPC Specialist Galactic Computng Corp. Tel: 86-755-26733939 ext 826 Mobile: 86-13823161729 / 852-60333151 Fax: 86-755-26733780 URL: http://www.galactic.com.hk<http://www.galactic.com.hk/> _______________________________________________ drbd-user mailing list drbd-user@lists.linbit.com<mailto:drbd-user@lists.linbit.com> http://lists.linbit.com/mailman/listinfo/drbd-user James Perry Principal Consultant Mezeo Software t: 713.244.0859 f: 713.244.0851 m: 713.444.0251

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