Set write_cache for ceph disks persistent

[Sebastian Schubert]

Hi,

we changed the write_cache setting for disk based ceph osds by chaging /sys/block/sdXX/queue/write_cache manually.
Is there a preffered way to set this in proxmox, or could this even be an enhancement request to set the write cache for ceph disks from pve?

 

[dcsapak]

there is a sysfsutils.service in the sysfsutils package for example:
https://sleeplessbeastie.eu/2019/07/22/how-to-configure-sysfs-during-system-boot/

but that is basically a bash script parsing /etc/sysfs.d/*.conf files and setting the values...

 

[jdancer]

Hi,

we changed the write_cache setting for disk based ceph osds by chaging /sys/block/sdXX/queue/write_cache manually.
Is there a preffered way to set this in proxmox, or could this even be an enhancement request to set the write cache for ceph disks from pve?

If you have SAS drives, you can run the following command as root: sdparm --set=WCE --save /dev/sd[X].

To confirm write cache is enabled as root, run: sdparm --get=WCE /dev/sd[X]

1 = on
0 = off