Received: from maia.hub.org (maia-3.hub.org [200.46.204.243]) by mail.postgresql.org (Postfix) with ESMTP id 580AB1337B68 for ; Thu, 3 Mar 2011 04:21:35 -0400 (AST) Received: from mail.postgresql.org ([200.46.204.86]) by maia.hub.org (mx1.hub.org [200.46.204.243]) (amavisd-maia, port 10024) with ESMTP id 78509-01 for ; Thu, 3 Mar 2011 08:21:28 +0000 (UTC) X-Greylist: delayed 00:06:22.343889 by SQLgrey-1.7.6 Received: from adonis.tweakers.net (adonis.tweakers.net [213.239.154.11]) by mail.postgresql.org (Postfix) with ESMTP id C5760133740B for ; Thu, 3 Mar 2011 04:21:27 -0400 (AST) Received: from [192.168.0.13] (f110172.upc-f.chello.nl [80.56.110.172]) by adonis.tweakers.net (Postfix) with ESMTPSA id 2F0B720F28 for ; Thu, 3 Mar 2011 09:15:04 +0100 (CET) Message-ID: <4D6F4E07.3060609@tweakers.net> Date: Thu, 03 Mar 2011 09:15:03 +0100 From: Arjen van der Meijden User-Agent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.2.14) Gecko/20110221 Lightning/1.0b2 Thunderbird/3.1.8 MIME-Version: 1.0 To: pgsql-performance@postgresql.org Subject: Re: Anyone tried Flashcache with PostgreSQL? References: <4D6BF303.6020000@agliodbs.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Maia Mailguard 1.0.1 X-Spam-Status: No, hits=-2.61 tagged_above=-10 required=5 tests=BAYES_00=-1.9, RCVD_IN_DNSWL_LOW=-0.7, T_RP_MATCHES_RCVD=-0.01 X-Spam-Level: X-Archive-Number: 201103/33 X-Sequence-Number: 42712 On 2-3-2011 16:29 Robert Haas wrote: > On Mon, Feb 28, 2011 at 2:09 PM, Josh Berkus wrote: >> Does anyone have the hardware to test FlashCache with PostgreSQL? >> >> http://perspectives.mvdirona.com/2010/04/29/FacebookFlashcache.aspx >> >> I'd be interested to hear how it performs ... > > It'd be a lot more interesting if it were a write-through cache rather > than a write-back cache, wouldn't it? That's what bcache tries to accomplish, both read and write cache. It also appears to aim to be more widely usable, rather than the relatively specific requirements the facebook variant is designed for. http://bcache.evilpiepirate.org/ They seem to try and combine both the dedicated ZIL and L2ARC functionality from ZFS in one block device based caching layer. Best regards, Arjen