So, which is correct, all replicas must be written or only min_size before ack? But for me the takeaway is that writes are protected - even if the journal drive crashes, I am covered. - epk -----Original Message----- From: ceph-users [mailto:ceph-users-bounces@xxxxxxxxxxxxxx] On Behalf Of Anthony D'Atri Sent: Friday, May 20, 2016 1:32 PM To: ceph-users@xxxxxxxxxxxxxx Subject: Re: Do you see a data loss if a SSD hosting several OSD journals crashes > Ceph will not acknowledge a client write before all journals (replica > size, 3 by default) have received the data, so loosing one journal SSD > will NEVER result in an actual data loss. Some say that all replicas must be written; others say that only min_size, 2 by default, must be written before ack. --aad _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com Legal Disclaimer: The information contained in this message may be privileged and confidential. It is intended to be read only by the individual or entity to whom it is addressed or by their designee. If the reader of this message is not the intended recipient, you are on notice that any distribution of this message, in any form, is strictly prohibited. If you have received this message in error, please immediately notify the sender and delete or destroy any copy of this message! _______________________________________________ ceph-users mailing list ceph-users@xxxxxxxxxxxxxx http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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