$ rados -p .default.rgw.buckets.index listomapkeys .dir.default.1970130.1 | wc -l
166768275
With each key containing between 100 and 250 bytes, this make a very big object for rados (several GB)... Especially when migrating it from an OSD to another (this will lock all writes), moreover, the OSD …
3.X Kernel for OpenVZ is out and it is compiled with rbd module:
root@debian:~# uname -a
Linux debian 3.10.0-3-pve #1 SMP Thu Jun 12 13:50:49 CEST 2014 x86_64 GNU/Linux
root@debian:~# modinfo rbd
filename: /lib/modules/3.10.0-3-pve …You have probably already be faced to migrate all objects from a pool to another, especially to change parameters that can not be modified on pool. For example, to migrate from a replicated pool to an EC pool, change EC profile, or to reduce the number of PGs... There are …
This is a simple example of federated gateways config to make an asynchonous replication between two Ceph clusters.
(Update Nov. 2016 : Since Jewel version, radosgw-agent is no more needed and active-active replication between zone is now supported. See here : http://docs.ceph.com/docs/jewel/radosgw/multisite/)
( The configuration below …
Get the PG distribution per osd in command line :
pool : 0 1 2 3 | SUM
------------------------------------------------
osd.10 6 6 6 84 | 102
osd.11 7 6 6 76 | 95
osd.12 4 4 3 56 | 67
osd.20 5 5 5 107 | 122
osd.13 3 3 3 73 | 82 …