Return-Path: X-Original-To: apmail-cassandra-user-archive@www.apache.org Delivered-To: apmail-cassandra-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id 02F287A7F for ; Mon, 18 Jul 2011 19:20:50 +0000 (UTC) Received: (qmail 28240 invoked by uid 500); 18 Jul 2011 19:20:46 -0000 Delivered-To: apmail-cassandra-user-archive@cassandra.apache.org Received: (qmail 27781 invoked by uid 500); 18 Jul 2011 19:20:45 -0000 Mailing-List: contact user-help@cassandra.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: user@cassandra.apache.org Delivered-To: mailing list user@cassandra.apache.org Received: (qmail 27661 invoked by uid 99); 18 Jul 2011 19:20:45 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 18 Jul 2011 19:20:45 +0000 X-ASF-Spam-Status: No, hits=-0.0 required=5.0 tests=SPF_HELO_PASS,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: domain of izquierdo@strands.com designates 217.116.18.226 as permitted sender) Received: from [217.116.18.226] (HELO mail.strands.com) (217.116.18.226) by apache.org (qpsmtpd/0.29) with ESMTP; Mon, 18 Jul 2011 19:20:37 +0000 Received: from localhost (localhost [127.0.0.1]) by mail.strands.com (Postfix) with ESMTP id 022C7304982 for ; Mon, 18 Jul 2011 21:20:17 +0200 (CEST) X-Virus-Scanned: Debian amavisd-new at strands.com X-Spam-Score: -9.5 X-Spam-Level: Received: from mail.strands.com ([127.0.0.1]) by localhost (mail.strands.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s-uNywbAmCER for ; Mon, 18 Jul 2011 21:20:16 +0200 (CEST) Received: from [192.168.1.141] (247.66.217.87.dynamic.jazztel.es [87.217.66.247]) (using SSLv3 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: izquierdo) by mail.strands.com (Postfix) with ESMTPSA id 7D40B30496B for ; Mon, 18 Jul 2011 21:20:16 +0200 (CEST) Subject: Re: Anyone using Facebook's flashcache? From: =?ISO-8859-1?Q?H=E9ctor?= Izquierdo Seliva To: user@cassandra.apache.org In-Reply-To: <4E2485E5.9020306@dude.podzone.net> References: <4E1C61F8.7040103@dude.podzone.net> <4E1C84B0.1070306@dude.podzone.net> <4E1D242E.8050306@dude.podzone.net> <1310927350.1931.13.camel@Avalon> <4E2387BB.8050108@dude.podzone.net> <1310984091.2627.7.camel@mierdi-laptop> <4E247303.4090506@dude.podzone.net> <1311012504.1929.1.camel@Avalon> <4E2485E5.9020306@dude.podzone.net> Content-Type: text/plain; charset="UTF-8" Date: Mon, 18 Jul 2011 21:20:13 +0200 Message-ID: <1311016813.1929.3.camel@Avalon> Mime-Version: 1.0 X-Mailer: Evolution 2.32.2 Content-Transfer-Encoding: 7bit X-Old-Spam-Flag: NO X-Old-Spam-Status: No, score=-9.5 required=5.1 tests=[ALL_TRUSTED=-5.5, BAYES_00=-4] autolearn=ham > > If using the version that has both rt and wt caches, is it just the wt > cache that's polluted for compactions/flushes? If not, why does the rt > cache also get polluted? > As I said, all reads go through flashcache, so if you read three 10 GB sstables for a compaction you will get those 30 GB into the cache.