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From: Rolf Fokkens <rolf@rolffokkens.nl>
To: dm-devel@redhat.com
Subject: Re: Status dm-cache
Date: Tue, 27 Aug 2013 12:50:25 +0200	[thread overview]
Message-ID: <521C8471.3090804@rolffokkens.nl> (raw)
In-Reply-To: <521C8075.7060903@redhat.com>

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

      reply	other threads:[~2013-08-27 10:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-08-25 21:46 Status dm-cache Rolf Fokkens
2013-08-27 10:33 ` Zdenek Kabelac
2013-08-27 10:50   ` Rolf Fokkens [this message]

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