Changing mClock profiles

The default mClock profile is set to balanced. The other types of the built-in profile are high_client_ops and high_recovery_ops.

Note: The custom profile is not recommended unless you are an advanced user.

Prerequisites

A running IBM Storage Ceph cluster.
Root-level access to the Ceph Monitor host.

Procedure

Log into the cephadm shell:

Example
```
[root@host01 ~]# cephadm shell
```
Set the osd_mclock_profile option:

Syntax
```
ceph config set osd._OSD_ID_ osd_mclock_profile VALUE
```
Example
```
[ceph: root@host01 /]# ceph config set osd.0 osd_mclock_profile high_recovery_ops
```
This example changes the profile to allow faster recoveries on osd.0.
Note: For optimal performance the profile must be set on all Ceph OSDs by using the following command:
Syntax
```
ceph config set osd osd_mclock_profile VALUE
```