[DRBD-user] slow disk throughput (fwd)

Lars Marowsky-Bree lmb at suse.de
Thu Jun 19 18:23:56 CEST 2008


On 2008-06-17T12:37:06, Tom Brown <wc-linbit.com at vmail.baremetal.com> wrote:

>     8.0.12 (api:86/proto:86)
>     --------
>     [...]
>      * Two new config options no-disk-flushes and no-md-flushes to disable
>        the use of io subsystem flushes and barrier BIOs.
>     [...]

The better and safer option towards higher performance is putting the
metadata on a different spindle, or possibly even on an SSD drive.

Having the metadata and data on the same spindle is going to cause a
significant performance hit due to the AL.


Regards,
    Lars

-- 
Teamlead Kernel, SuSE Labs, Research and Development
SUSE LINUX Products GmbH, GF: Markus Rex, HRB 16746 (AG Nürnberg)
"Experience is the name everyone gives to their mistakes." -- Oscar Wilde




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