Read & Witte cache
RafS
32 Posts
September 26, 2018, 11:08 amQuote from RafS on September 26, 2018, 11:08 amIt would be nice tot beste able to use bcache or dmcache for optimize the read and write performance with bluestore.
It would be nice tot beste able to use bcache or dmcache for optimize the read and write performance with bluestore.
admin
2,921 Posts
September 26, 2018, 8:34 pmQuote from admin on September 26, 2018, 8:34 pmIt is something we are following. We just need for this technology (bcache or dm-cache) to mature and see mainstream adoption within Ceph.
It is something we are following. We just need for this technology (bcache or dm-cache) to mature and see mainstream adoption within Ceph.
RafS
32 Posts
September 27, 2018, 4:58 amQuote from RafS on September 27, 2018, 4:58 amOk Thanks,
Any idea on timing ? Could you in meantime give us a choise between filestore and bluestore ? In my configuration FileStore performs better than BlueStore.
In every node i have a nvme drive that was used as journal for 4 1tb sata-disks. The nvme is a 1TB disk. At this moment with bluestore it is only used for 80 GB db/wal. I would like to use it again as journal disk for FileStore.
Regards
Raf
Ok Thanks,
Any idea on timing ? Could you in meantime give us a choise between filestore and bluestore ? In my configuration FileStore performs better than BlueStore.
In every node i have a nvme drive that was used as journal for 4 1tb sata-disks. The nvme is a 1TB disk. At this moment with bluestore it is only used for 80 GB db/wal. I would like to use it again as journal disk for FileStore.
Regards
Raf
admin
2,921 Posts
September 27, 2018, 2:24 pmQuote from admin on September 27, 2018, 2:24 pmNo immediate plans until there is general adoption of this. During a presentation on Bluestore last year, Sage Weil the principal architect of Ceph, did state block level caching support via bcache or dm-cache will be on the roadmap, but so far there is no concrete work done by the Ceph developers. There are already users who implemented this in their clusters, but not all had good success..so it is really better to wait.
re Filestore support, it may be possible, but logically all the Ceph dev focus is on Bluestore (and beyond) , there is ongoing work for performance optimizations, so in that regards in may not make sense to go back.
No immediate plans until there is general adoption of this. During a presentation on Bluestore last year, Sage Weil the principal architect of Ceph, did state block level caching support via bcache or dm-cache will be on the roadmap, but so far there is no concrete work done by the Ceph developers. There are already users who implemented this in their clusters, but not all had good success..so it is really better to wait.
re Filestore support, it may be possible, but logically all the Ceph dev focus is on Bluestore (and beyond) , there is ongoing work for performance optimizations, so in that regards in may not make sense to go back.
Read & Witte cache
RafS
32 Posts
Quote from RafS on September 26, 2018, 11:08 amIt would be nice tot beste able to use bcache or dmcache for optimize the read and write performance with bluestore.
It would be nice tot beste able to use bcache or dmcache for optimize the read and write performance with bluestore.
admin
2,921 Posts
Quote from admin on September 26, 2018, 8:34 pmIt is something we are following. We just need for this technology (bcache or dm-cache) to mature and see mainstream adoption within Ceph.
It is something we are following. We just need for this technology (bcache or dm-cache) to mature and see mainstream adoption within Ceph.
RafS
32 Posts
Quote from RafS on September 27, 2018, 4:58 amOk Thanks,
Any idea on timing ? Could you in meantime give us a choise between filestore and bluestore ? In my configuration FileStore performs better than BlueStore.
In every node i have a nvme drive that was used as journal for 4 1tb sata-disks. The nvme is a 1TB disk. At this moment with bluestore it is only used for 80 GB db/wal. I would like to use it again as journal disk for FileStore.
Regards
Raf
Ok Thanks,
Any idea on timing ? Could you in meantime give us a choise between filestore and bluestore ? In my configuration FileStore performs better than BlueStore.
In every node i have a nvme drive that was used as journal for 4 1tb sata-disks. The nvme is a 1TB disk. At this moment with bluestore it is only used for 80 GB db/wal. I would like to use it again as journal disk for FileStore.
Regards
Raf
admin
2,921 Posts
Quote from admin on September 27, 2018, 2:24 pmNo immediate plans until there is general adoption of this. During a presentation on Bluestore last year, Sage Weil the principal architect of Ceph, did state block level caching support via bcache or dm-cache will be on the roadmap, but so far there is no concrete work done by the Ceph developers. There are already users who implemented this in their clusters, but not all had good success..so it is really better to wait.
re Filestore support, it may be possible, but logically all the Ceph dev focus is on Bluestore (and beyond) , there is ongoing work for performance optimizations, so in that regards in may not make sense to go back.
No immediate plans until there is general adoption of this. During a presentation on Bluestore last year, Sage Weil the principal architect of Ceph, did state block level caching support via bcache or dm-cache will be on the roadmap, but so far there is no concrete work done by the Ceph developers. There are already users who implemented this in their clusters, but not all had good success..so it is really better to wait.
re Filestore support, it may be possible, but logically all the Ceph dev focus is on Bluestore (and beyond) , there is ongoing work for performance optimizations, so in that regards in may not make sense to go back.