From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rolf Fokkens Subject: Re: Status dm-cache Date: Tue, 27 Aug 2013 12:50:25 +0200 Message-ID: <521C8471.3090804@rolffokkens.nl> References: <521A7B1B.2070500@rolffokkens.nl> <521C8075.7060903@redhat.com> Reply-To: device-mapper development Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; Format="flowed" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <521C8075.7060903@redhat.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: dm-devel@redhat.com List-Id: dm-devel.ids Thanks. I'll defer integrating dm-cache in Fedora until LVM2 supports it. Rolf On 08/27/2013 12:33 PM, Zdenek Kabelac wrote: > Dne 25.8.2013 23:46, Rolf Fokkens napsal(a): >> Hi! >> >> I'm trying to package some tools for "SSD caching" for Fedora 20, see: >> https://bugzilla.redhat.com/show_bug.cgi?id=998543 >> >> bcache has some nice bcache-tools, and packaging progresses well: >> https://bugzilla.redhat.com/show_bug.cgi?id=999690 >> >> Packaging dm-cache however seems seems hard. I'm not aware of any >> userland >> tools, and using dm-cache (without them) seems quite complex. Looks >> like all >> kinds of math are needed to make it work, e.g. : >> http://blog.kylemanna.com/linux/2013/06/30/ssd-caching-using-dmcache-tutorial/. >> >> - Is there a (well supported) toolset available that I'm missing? >> - Is there any kind of autodetect possible, e.g. during boot? >> >> Any information on the status of dm-cache is appreciated. > > > For direct usage of dm-cache target: > > linux/Documentation/device-mapper/cache.txt > linux/Documentation/device-mapper/cache-policies.txt > > Userland tool here is dmsetup. > > There will be a direct support for dm cache device stacking in lvm2 in > the future. It will use nearly the same code as is used for thin > provisioning, > so the code for now thinp is improved to handle recovery more > autonomously first before the caching support will be added. > > Zdenek > > -- > dm-devel mailing list > dm-devel@redhat.com > https://www.redhat.com/mailman/listinfo/dm-devel