From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Torcz Subject: Re: Using SSDs for caching? Date: Thu, 18 Jun 2009 17:55:30 +0200 Message-ID: <20090618155530.GA16819@mother.pipebreaker.pl> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 To: linux-btrfs@vger.kernel.org Return-path: In-Reply-To: List-ID: On Thu, Jun 18, 2009 at 03:56:23PM +0200, Roy Sigurd Karlsbakk wrote: > I have heard/read about systems from Sun and NetApp using SDs for =20 > caching. Sun uses different SDs for read and write caching (one being= =20 > faster for reads and the other for writes). The storage solution from= =20 > Sun is based on Solaris with ZFS. > > I know too little about filesystems design to know exactly how they d= o =20 > this, but can someone think of a way this could be implemented in btr= fs?=20 Linux already has second-level=C2=B9 cache layer, it called FS-Cache.= 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 Tomasz Torcz "Never underestimate the bandwidth of a stat= ion xmpp: zdzichubg@chrome.pl wagon filled with backup tapes." -- Jim Gr= ay -- 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