From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?ISO-8859-1?Q?Jo=E3o_Eduardo_Lu=EDs?= Subject: Re: TOO SLOW data write speed and delete.. NEED HELP Date: Tue, 13 Mar 2012 19:33:40 +0000 Message-ID: <4F5FA114.7070806@gmail.com> References: Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigCAB23848FD68C486E14D38A6" Return-path: Received: from mail-gx0-f174.google.com ([209.85.161.174]:33239 "EHLO mail-gx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753866Ab2CMTdp (ORCPT ); Tue, 13 Mar 2012 15:33:45 -0400 Received: by gghe5 with SMTP id e5so944994ggh.19 for ; Tue, 13 Mar 2012 12:33:45 -0700 (PDT) In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: madhusudhana Cc: ceph-devel@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigCAB23848FD68C486E14D38A6 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On 03/13/2012 10:39 AM, madhusudhana wrote: > Hi all, > Can someone PLEASE help me to understand why data copying (simple cp > or rsync) is SO slow in CEPH ? And delete command (\rm -rf) for removin= g > a small (175M) directory is taking so much of time. Because of this, > i am not able to complete evaluation of ceph using my actual workload. = >=20 > I am hereby requesting all to help me in finding out the reason for=20 > slow write/delete in my ceph cluster. I am really trying hard to=20 > complete the evaluation with actual workload but not able to copy the > data whats required for evaluation to ceph cluster bcz of slow copy. >=20 > I really appreciate any help on this. >=20 > Thanks in advance > Madhusudhan >=20 Hi Madhusudhan, Are you using Btrfs? And are you taking snapshots while you're performing those operations? --=20 Jo=E3o Eduardo Lu=EDs gpg key: 477C26E5 from pool.keyserver.eu --------------enigCAB23848FD68C486E14D38A6 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iQEcBAEBAgAGBQJPX6EUAAoJEJ9vvxhHfCblamwH/AmXQkDDCHTCBijDHnm87fYx hXrVAYVQBR8zqUMOWwtwvSvgpMMaWWbKXJNvb76KZa/2w8mMBhOm4wV/LyzOE9uc kPmNnqkcrjAoT/Q1lLh9VXB7fDANLWZvDs3mdH+yt8ahXyuV3ihYjh4LxcFhqbD3 cXDjxUhO61qOTw2h6tEx1gz13dnbqnhAX+A4DPeJXmIFe/DhcjYppAeK1NYaryLC xIJBeDMQvx9r1b8P3UY5UeHP/2d34HFZ3nE/K1Hm45WBrgo1PF/8cb/eRep+2fJ3 uURHn6/8tgXYOZ/UzC5p0uXnTUT64pi9ElproEWHoy0hfgO4si9Np049LDc49TQ= =y8m1 -----END PGP SIGNATURE----- --------------enigCAB23848FD68C486E14D38A6--