From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?B?U8OpYmFzdGllbiBXYWNxdWlleg==?= Subject: Re: Using SSDs for caching? Date: Fri, 19 Jun 2009 08:57:12 +0200 Message-ID: <4A3B36C8.2070500@enix.org> References: <20090618155530.GA16819@mother.pipebreaker.pl> Reply-To: sw@enix.org Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed To: linux-btrfs@vger.kernel.org Return-path: In-Reply-To: <20090618155530.GA16819@mother.pipebreaker.pl> List-ID: Tomasz Torcz a =C3=A9crit : > Linux already has second-level=C2=B9 cache layer, it called FS-Cach= e. For now, > the sole user is NFS. btrfs could take advantage of FS-Cache also. > > =C2=B9 first-level is page cache in RAM > =20 =46S-Cache is a good thing to speedup your network filesystem, but to b= e=20 efficient localy, IMHO, the second-level cache shoud be at the block le= vel. So it should go directly in btrfs or in something like the device mappe= r ... S=C3=A9bastien Wacquiez -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" = in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html