On 1/10/20 5:32 PM, Stefan Priebe - Profihost AG wrote: > Hi, > > we‘re currently in the process of building a new ceph cluster to backup rbd images from multiple ceph clusters. > > We would like to start with just a single ceph cluster to backup which is about 50tb. Compression ratio of the data is around 30% while using zlib. We need to scale the backup cluster up to 1pb. > > The workload on the original rbd images is mostly 4K writes so I expect rbd export-diff to do a lot of small writes. > > The current idea is to use the following hw as a start: > 6 Servers with: > 1 AMD EPYC 7302P 3GHz, 16C/32T > 128g Memory > 14x 12tb Toshiba Enterprise MG07ACA HDD drives 4K native > Dual 25gb network > That should be sufficient. The AMD Epyc is a great CPU and you have enough memory. > Does it fit? Has anybody experience with the drives? Can we use EC or do we need to use normal replication? > EC will just work. It will be fast enough. But since it's only a backup system it should work out. Oh, more servers is always better. Wido > Greets, > Stefan > _______________________________________________ > 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
 |