[Lustre-devel] WBC HLD outline
bzzz at sun.com
Wed Mar 25 09:32:39 PDT 2009
>>>>> Alexander Zarochentsev (AZ) writes:
AZ> Server MD stack has to support both WBC and non-WBC clients for the same
AZ> objects. It is why I think MDT layer should handle MD ops as well as
AZ> MDS/RAW ops. Then CMM only passes RAW operations to MDD layer, where
AZ> raw ops are already supported.
btw, what's problem with supporting WBC and non-WBC clients for same objects?
any time you access some object via short (MDT-OSD for WBC client) or long
(MDT-MDD-OSD) for non-WBC client) it's initialized at all layers (MDT-MDD-OSD).
More information about the lustre-devel