From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ming Zhang Subject: Re: Device Mapper as a cache for SAN? Date: Mon, 10 Apr 2006 20:50:22 -0400 Message-ID: <1144716622.8591.200.camel@localhost.localdomain> References: <20060410184531.GA12908@www.ewilts.org> <1144704325.8591.170.camel@localhost.localdomain> <1144715744.8591.197.camel@localhost.localdomain> Reply-To: mingz@ele.uri.edu, device-mapper development Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: dm-devel-bounces@redhat.com Errors-To: dm-devel-bounces@redhat.com To: Eric Van Hensbergen Cc: device-mapper development List-Id: dm-devel.ids On Mon, 2006-04-10 at 19:47 -0500, Eric Van Hensbergen wrote: > On 4/10/06, Ming Zhang wrote: > > > > yes, "page cache" has its meaning in linux. > > > > Sorry - my bad, I should have known better. > > > > > as i know, no stable implementation for this. > > > > Okay - I'll take a shot at it - should be a good intro to > device-mapper as a framework. If anyone else is going down this path, > please shoot me an email so I don't end up duplicating effort. good luck. a disk cache for remote storage system is not always useful, considering u already have GB RAM here at file system level. of course, depends on your workload pattern and remote access cost, u might get some marginal benefits. > > -eric