Ceph » rbd

Hello Team,
Please help me i deploy two ceph cluster with 6 node configuration almost 800tb of capacity. and configurae in the DC-DR configuration for the data high availability. i eanbel the rwg and rbd block device mirroring for the replocatio of the data. we have the 10 GBPS fiber replication network .
when we first start rbd mirror from our dc to dr starting time when we are replication our exsisting data that time we are getting almomst 8 GBPS replication speed and it's work fine. once all the exesting images data replicated now we are facing the replication speed issue . now only we are getting the 5 to 10 mbps relication speed. we also try to find the option like rbd_journal_max_payload_bytes and rbd_mirror_journal_max_fetch_bytes but max payload size we try to increase but we don't get any result regarding the speed. it still same . and rbd_mirror_journal_max_fetch_bytes option we are not able to find on the our ceph version. i also try to modify some other values and increase like
rbd_mirror_memory_target
rbd_mirror_memory_cache_min

you also can find some refrence regarding this values for increase performace.

Eugen

[1]

https://tracker.ceph.com/projects/ceph/repository/revisions/1ef12ea0d29f955…

[2]

https://github.com/ceph/ceph/pull/27670

Information of my ceph Cluster.

Version: ceph version 17.2.5 (98318ae89f1a893a6ded3a640405cdbb33e08757) quincy (stable)

rbd-mirror daemon version: 17.2.5

Mirror mode; pool

max image mirro at time: 5

replication network: 10 gbps (dedicated)

Client: DC cluster we are continue writing the 50 to 400 mbps data but
replication only 5 to 10 mbps.

issue: speed only we get the 4 to 5 mbps. also we have the 10 Gbps replication network
bandwidth.

Note::- I also try to find the option rbd_mirror_journal_max_fetch_bytes but i'm not
able to find the this option in the configuration. also when i try to set from the
command
line it's showing error like

command:
ceph config set client.rbd rbd_mirror_journal_max_fetch_bytes 33554432

error:
Error EINVAL: unrecognized config option 'rbd_mirror_journal_max_fetch_bytes'