From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark Nelson Subject: Re: [ceph-users] keyvaluestore backend metadata overhead Date: Tue, 03 Feb 2015 21:15:38 -0600 Message-ID: <54D18EDA.6020901@redhat.com> References: <6F3FA899187F0043BA1827A69DA2F7CC0214CCFA@shsmsx102.ccr.corp.intel.com> Reply-To: mnelson@redhat.com Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail-qg0-f49.google.com ([209.85.192.49]:57910 "EHLO mail-qg0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751753AbbBDDPm (ORCPT ); Tue, 3 Feb 2015 22:15:42 -0500 Received: by mail-qg0-f49.google.com with SMTP id e89so641167qgf.8 for ; Tue, 03 Feb 2015 19:15:41 -0800 (PST) In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Chris Pacejo , "Chen, Xiaoxi" Cc: Haomai Wang , Sage Weil , "ceph-devel@vger.kernel.org" On 02/03/2015 09:03 AM, Chris Pacejo wrote: > Hi Xiaoxi, > > On Sun, Feb 1, 2015 at 9:50 AM, Chen, Xiaoxi wrote: >> We can always use a structure database in an unstructured way, I think it's workable in theory, but why choose MySQL? > > In our internal performance tests, it performed better than LevelDB > and some others, and it's well-proven. It's not our first choice, nor > are we done investigating other options. But we'll check out LMDB, > thanks for the pointer. > > Regardless, the issues we're seeing are equally applicable to any > key-value backend. You may also wish to try the rocksdb backend with universal compaction rather than leveled compaction. > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >