[dm-devel] How to use dm-cache-target?

[Darrick J. Wong]

On Mon, Mar 11, 2013 at 10:31:53AM +0000, thornber at redhat.com wrote:
> On Mon, Mar 11, 2013 at 10:28:07AM +0800, majianpeng wrote:
> > Hi all,
> >     I am trying to use dm-cache-target on raid5.But i met a question.
> > 
> >  Supposed: /dev/sdb1(5GB) is metadata; /dev/sdb2(20GB) is cache;/dev/md0 is raid5.
> > 
> > 1:sutup my_cache
> > dmsetup create my_cache --table '0 41943040 cache /dev/sdb1 /dev/sdb2 /dev/md0 131072 1 writethrough default 0'
> 
> 41943040 - This is 20G, you should use the size of /dev/md0 in sectors
> 
> Also I think your block size is way too big, try 2048 rather tha 131072.
> 
> > BTW, for dm-cache is it support plug-and-play?
> 
> No idea what you mean.

I suspect the poster's asking if dmcaches will automatically reassemble
themselves.

I've been wondering myself what's the status of the lvm-tools integration? :)

--D
> 
> - Joe
> 
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