[sheepdog-users] Performance without cache

Liu Yuan namei.unix at gmail.com
Tue Aug 20 10:47:46 CEST 2013

On Tue, Aug 20, 2013 at 10:09:40AM +0200, Valerio Pachera wrote:
> 2013/8/20 Kai Zhang <kyle at zelin.io>:
> > Would you like to show us the raw performance on the physical machine?
> root at test004:/mnt/sheep/dsk02# dd if=/dev/zero of=c bs=1M count=512 oflag=direct
> 512+0 record dentro
> 512+0 record fuori
> 536870912 byte (537 MB) copiati, 3,92691 s, 137 MB/s

This might be not fair because for host backend write, we add 'sync' for sheep
to assure data written in the persistent medium of disk.

How about 'dd if=/dev/zero of=c bs=1M count=512 oflag=direct,sync' in host?


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