2010/5/22 redshield88888 <redshield88888@xxxxxxxxx>: > Hi, all. > > I've succeeded to install pNFS-enabled kernel. But I wonder that how > does pNFS behaviour. > Especially, about synchronizations between the MetaDataServer and > DataServers. pNFS does not specify any MDS <-> DS protocol. > I'd read a paper of the Calsoft's. This paper said like "There is > heartbeats betweenthe MetaDataServer and DataServers". > http://www.calsoftinc.com/download_pdf/White%20Papers%20-%20pnfs.pdf > > When will this heartbeat be started ? The instruction below is not describe > about this, but the heartbeat will works, w'not this ? > http://wiki.linux-nfs.org/wiki/index.php/PNFS_Setup_Instructions These instructions need to be clarified. There are two file layout server implementations. One is based on GFS2 where GFS2 nodes can be an MDS, a DS or both an MDS/DS. GFS2 has it's own heartbeat and such between GFS2 nodes. The other file layout implementation is spNFS, which is not a full-blown file system in that there is limited communication between the MDS and the DS. There is no heart beat.. Updating the pNFS setup page is on our todo list... -->Andy > > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
