Hello, On Wed, 15 Mar 2017 21:36:00 +0000 James Okken wrote:
> Thanks gentlemen, > > I hope to add more OSD since we will need a good deal more than 2.3TB and I > fo want to leave free space / margins. > > I am also thinking of reducing the replication to2 . > I am sure I can google how to do that. But I am sure most of my results are > going to be people telling me not to do it. Mostly for good reasons, but that is quite diminished in your RAID'ed OSDs. > Can you direct me to a good tutorial on how to do so. > No such thing, but you already must have changed your configuration, as your pools are min_size 1, which is not the default. Changing them to size=2 should do the trick. Christian > > And, youre are right, I am a beginner. > > James Okken > Lab Manager > Dialogic Research Inc. > 4 Gatehall Drive > Parsippany > NJ 07054 > USA > > Tel: 973 967 5179 > Email: james.ok...@dialogic.com > Web: www.dialogic.com – The Network Fuel Company > > This e-mail is intended only for the named recipient(s) and may contain > information that is privileged, confidential and/or exempt from disclosure > under applicable law. No waiver of privilege, confidence or otherwise is > intended by virtue of communication via the internet. Any unauthorized use, > dissemination or copying is strictly prohibited. If you have received this > e-mail in error, or are not named as a recipient, please immediately notify > the sender and destroy all copies of this e-mail. > > -----Original Message----- > From: ceph-users [mailto:ceph-users-boun...@lists.ceph.com] On Behalf Of > Maxime Guyot > Sent: Tuesday, March 14, 2017 7:29 AM > To: Christian Balzer; ceph-users@lists.ceph.com > Subject: Re: [ceph-users] total storage size available in my CEPH setup? > > Hi, > > >> My question is how much total CEPH storage does this allow me? Only 2.3TB? > >> or does the way CEPH duplicates data enable more than 1/3 of the storage? > > 3 means 3, so 2.3TB. Note that Ceph is spare, so that can help quite a bit. > > > > To expand on this, you probably want to keep some margins and not run at your > cluster 100% :) (especially if you are running RBD with thin provisioning). > By default, “ceph status” will issue a warning at 85% full (osd nearfull > ratio). You should also consider that you need some free space for auto > healing to work (if you plan to use more than 3 OSDs on a size=3 pool). > > Cheers, > Maxime > > _______________________________________________ > ceph-users mailing list > ceph-users@lists.ceph.com > http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com -- Christian Balzer Network/Systems Engineer ch...@gol.com Global OnLine Japan/Rakuten Communications http://www.gol.com/ _______________________________________________ ceph-users mailing list ceph-users@lists.ceph.com http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
