In this doc,
http://ceph.com/docs/master/rados/configuration/filesystem-recommendations/
It says,
Ceph aims for data safety, which means that when the Ceph Client receives
notice that data was written to a storage drive, that data was actually written
to the storage drive. For old kernels (<2.6.33), disable the write cache if the
journal is on a raw drive. Newer kernels should work fine.
Use hdparm to disable write caching on the hard disk:
sudo hdparm -W 0 /dev/hda
Does it mean the disk write cache should be always disabled for ceph, or just
when using the old kernel (<2.6.33)?
Thanks for your time!
_______________________________________________
ceph-users mailing list
ceph-users@lists.ceph.com
http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
