From mboxrd@z Thu Jan 1 00:00:00 1970 From: Josh Durgin Subject: Re: workload balance Date: Mon, 27 Jun 2011 14:06:45 -0700 Message-ID: <4E08F0E5.4080501@dreamhost.com> References: Mime-Version: 1.0 Content-Type: text/plain; charset=GB2312 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from mail.hq.newdream.net ([66.33.206.127]:60526 "EHLO mail.hq.newdream.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754139Ab1F0VGs convert rfc822-to-8bit (ORCPT ); Mon, 27 Jun 2011 17:06:48 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: huang jun Cc: ceph-devel On 06/27/2011 02:34 AM, huang jun wrote: > hi=A3=ACall > Here is a problem confused me a lot. Some OSD's workload will be very= high > when the client read a file continuously. So i think the cluster must > have a strategy to balance workload > there are two classes "MovingAverager and IATAverager ",but i can no= t > figure out what the class IATAverager mean here? > and futhermore, can we bring tiered storage theory in ceph? >=20 > thanks! Those classes were attempts to use some statistics to discard some reads, but they did not work so they've been removed from master. Our current strategy is simply striping files across objects. Josh -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html