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Il 14/12/2023 16:08, Joe Julian ha scritto: > With ceph, if the placement database is corrupted, all your data is lost > (happened to my employer, once, losing 5PB of customer data). From what I've been told (by experts) it's really hard to make it happen. More if proper redundancy of MON and MDS daemons is implemented on quality HW. > With Gluster, it's just files on disks, easily recovered. I've already had to do it twice in a year...

...at as bricks. If the array does fail, the larger brick means much longer heal times. My main question I ask when evaluating storage solutions is, "what happens when it fails?" With ceph, if the placement database is corrupted, all your data is lost (happened to my employer, once, losing 5PB of customer data). With Gluster, it's just files on disks, easily recovered. If your data is easily replaced, ceph offers copy-on-write which is really handy for things like VM images where you might want to clone 100 simultaneously. On December 14, 2023 6:57:00 AM PST, Alvin Starr <alvin...

On December 17, 2023 5:40:52 AM PST, Diego Zuccato <diego.zuccato at unibo.it> wrote: >Il 14/12/2023 16:08, Joe Julian ha scritto: > >> With ceph, if the placement database is corrupted, all your data is lost (happened to my employer, once, losing 5PB of customer data). > >From what I've been told (by experts) it's really hard to make it happen. More if proper redundancy of MON and MDS daemons is implemented on quality HW. > LSI isn't exactly crap hardware. But when a flaw causes it to drop drives under heavy load, the rebal...

We are a CentOS shop, and have the lucky, fortunate problem of having ever-increasing amounts of data to manage. EXT3/4 becomes tough to manage when you start climbing, especially when you have to upgrade, so we're contemplating switching to ZFS. As of last spring, it appears that ZFS On Linux http://zfsonlinux.org/ calls itself production ready despite a version number of 0.6.2, and