Does Ceph now supports volume group of RBDs? From which version if any? regards, samuel huxiaoyu@xxxxxxxxxxxx From: Robert Sander Date: 2021-01-21 10:57 To: ceph-users Subject: Re: Large rbd Hi, Am 21.01.21 um 05:42 schrieb Chris Dunlop: > Is there any particular reason for that MAX_OBJECT_MAP_OBJECT_COUNT, or > it just "this is crazy large, if you're trying to go over this you're > doing something wrong, rethink your life..."? IMHO the limit is there because of the way deletion of RBDs work. "rbd rm" has to look for every object, not only the ones that were really created. This would make deleting a very very large RBD take a very very long time. > Rather than a single large rbd, should I be looking at multiple smaller > rbds linked together using lvm or somesuch? What are the tradeoffs? IMHO there are no tradeoffs, there could even be benefits creating a volume group with multiple physical volumes on RBD as the requests can be bettere parallelized (i.e. virtio-single SCSI controller for qemu). Regards -- Robert Sander Heinlein Support GmbH Schwedter Str. 8/9b, 10119 Berlin http://www.heinlein-support.de Tel: 030 / 405051-43 Fax: 030 / 405051-19 Zwangsangaben lt. §35a GmbHG: HRB 93818 B / Amtsgericht Berlin-Charlottenburg, Geschäftsführer: Peer Heinlein -- Sitz: Berlin _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx _______________________________________________ ceph-users mailing list -- ceph-users@xxxxxxx To unsubscribe send an email to ceph-users-leave@xxxxxxx
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