how to change CEPH OSD logical sector size?

[Magneto]

Hi,

Does anyone know how to change the Logical Sector size of a CEPH OSD? I have searched the forums but cannot find a solution.

 

[Alwin]

Logical Sector size of a CEPH OSD

What do you mean by that? I guess you mean the object size.

You can change the object size of a RBD image on creation.
http://docs.ceph.com/docs/master/man/8/rbd/

 

[Magneto]

What do you mean by that? I guess you mean the object size.

https://www.ibm.com/developerworks/library/l-4kb-sector-disks/

 

[udo]

https://www.ibm.com/developerworks/library/l-4kb-sector-disks/

Hi,
since 2011 should all new hdd have 4k sectors. I assume you don't need anything special for using this for ceph.

With filestore the mount parameters are more essential for ceph.

Udo

 

[Alwin]

This arch wiki has good summary on the AF. https://wiki.archlinux.org/index.php/Advanced_Format

 

[Magneto]

Hi,
since 2011 should all new hdd have 4k sectors. I assume you don't need anything special for using this for ceph.

With filestore the mount parameters are more essential for ceph.

Udo

I have seen some bad performance in the past where 512 emulation is used. Hence, I want to switch it and test to see what happens.