From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andre Noll Subject: Re: v0.38 released Date: Fri, 18 Nov 2011 16:01:57 +0100 Message-ID: <20111118150157.GM13394@systemlinux.org> References: <20111115164254.GJ13394@systemlinux.org> <20111116095614.GK13394@systemlinux.org> <20111117103524.GL13394@systemlinux.org> Mime-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="vJI8q/aziP9idhqk" Return-path: Received: from systemlinux.org ([79.140.41.46]:41261 "EHLO v3-1046.systemlinux.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752154Ab1KRPAJ (ORCPT ); Fri, 18 Nov 2011 10:00:09 -0500 Content-Disposition: inline In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Tommi Virtanen Cc: Gregory Farnum , Sage Weil , ceph-devel@vger.kernel.org --vJI8q/aziP9idhqk Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Thu, Nov 17, 10:01, Tommi Virtanen wrote: > On Thu, Nov 17, 2011 at 02:35, Andre Noll wrote: > > I was under the impression that equal weights on all osds means to > > fill up all file systems by the same percentage, i.e. that file system > > sizes are already taken care of. > > > > But apparently this is not the case. =C2=A0So one has to set the weights > > manually according to the available disk space. >=20 > The weight is actually a combination of all the factors that would go > in: storage size, disk IO speed, network link bandwidth, heat in that > part of the data center, future expansion plans, .. True. But as we all know, perfect is the enemy of good ;) > We could automate more of it, but it really is a fundamentally holistic > number, and setting it based on just one aspect of reality will lead to > someone else being unhappy. So it goes something like this: >=20 > Step 1: improve documentation For starters, it would be nice to include the ceph osd subcommands in the man pages. To my knowledge they are only documented on the (old) wiki http://ceph.newdream.net/wiki/Monitor_commands at the moment. Would a patch that adds the subcommands and descriptions to the man pages be accepted? If so, I'd be willing to do this work. However, the files in man/ of the ceph git repo seem to be generated by docutils, so I suspect they are not meant to be edited directly. What's the preferred way to patch the man pages? > Step 2: have a monitoring system be able to feed back information to > use as osd weights, with admin customazability How could such a monitoring system be implemented? In particular if abstract criteria like "future extension plans" have to be considered. Andre --=20 The only person who always got his work done by Friday was Robinson Crusoe --vJI8q/aziP9idhqk Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAk7Gc2UACgkQWto1QDEAkw/JPwCeMawGuAfXtHYjWXKpuUhZi0pv XvYAn3ZgmeTgvS1MeSvFRymOSBvgnhLh =9Msj -----END PGP SIGNATURE----- --vJI8q/aziP9idhqk--