[DRBD-user] Mysql on DRBD: Cache Problem?

Mark Eisenblaetter mark.eisenblaetter at gmail.com
Fri Aug 1 16:27:09 CEST 2008


Hi Lee,

it seems taht my P400i has no drivewritecache option.
Wenn i try to modify it comes up whit an error. And in one document i fount
that it's default of in P800 controllers,
so i hope in my p400i too.

Mark

On Fri, Aug 1, 2008 at 3:33 PM, Lee Christie <Lee at titaninternet.co.uk>wrote:

>  Most hard drives ship with write-cache enabled.
>
> When using decent raid controllers its best to turn off the write(back)
> cache on hard drives. In our testing it makes no difference anyway with a
> good card.
>
> Its possible your lost data was in hard drive cache.
>
>  ------------------------------
> *From:* drbd-user-bounces at lists.linbit.com [mailto:
> drbd-user-bounces at lists.linbit.com] *On Behalf Of *Mark Eisenblaetter
> *Sent:* 01 August 2008 14:22
> *To:* drbd-user at lists.linbit.com
> *Subject:* [DRBD-user] Mysql on DRBD: Cache Problem?
>
>  Hi List,
>
> I'm trying to run a DRBDMySQL Cluster (Active/Passive) with Replication for
> easier backup.
>
> My problem ist that after a hardkill from the master(Powerkill) the slave
> misses binlog positions.
>
> After disable the Arraycontroller Write cache its reduced from 100k to 16k
> Position but that not enough.
>
> I run DRBD with Protocal C and the minimal max-buffer of 32k.
>
> Is there any cache i miss? Or somthing else?
>
> Mark
>
>
> setup: 2x HP DL360G5 whit raid 10 and Gigabit network for drbdsync only.
>
> --
> Mark Eisenblätter
> Geissendoerfer & Leschinsky GmbH
> www.gl-sytemhaus.de
>
>  ------------------------------
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-- 
Mark Eisenblätter
Geissendoerfer & Leschinsky GmbH
www.gl-sytemhaus.de
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