Limit Ceph-OSD backfill and recovery activity

Registered by Mykola Golub

Add the following parameters to ceph.conf:

    osd_max_backfills = 1
    osd_recovery_max_active = 1

This will limit I/O and network activity when rebalancing and recovering after adding/removing OSDs. This setting should help avoid situation when adding/removing nodes lead to cluster overload.

http://ceph.com/docs/master/rados/configuration/osd-config-ref/#recovery
http://ceph.com/docs/master/rados/configuration/osd-config-ref/#backfilling

Blueprint information

Status:
Complete
Approver:
None
Priority:
Undefined
Drafter:
Mykola Golub
Direction:
Needs approval
Assignee:
None
Definition:
Obsolete
Series goal:
None
Implementation:
Unknown
Milestone target:
None
Completed by
Mykola Golub

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