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. Can you direct me to a good tutorial on how to do so. 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.okken@xxxxxxxxxxxx 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-bounces@xxxxxxxxxxxxxx] On Behalf Of Maxime Guyot Sent: Tuesday, March 14, 2017 7:29 AM To: Christian Balzer; ceph-users@xxxxxxxxxxxxxx Subject: Re: 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@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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