> Hi, > > we have very bad experiences with hardware RAID-systems and therefore > try to implement a high-available NFS service via drbd and pacemaker. > > After reading lots of tutorials I am still not very comfortable with the > whole setup. My first reaction is that it is quite fragile instead of > high available. > > I have several questions but the most important for me is: > > What happens if the RAID storage on which drbd works fails on one node?
Data on the other node are ok. so no problem. Fix the raid / disk and start the replication. > Will the system seamlessly migrate to the unaffected node? Depends on your setup. But this is possible. Especially for a NFS server cluster. > After fixing the RAID storage, reinitialization of it and a restart of > the broken node, will the system recover automatically? Will drbd > recognize that it has do replicate the whole data and perform this? Or > is manual intervention necessary? Yes. DRBD is even so smart that it will replicate only the missing data. -- Dr. Michael Schwartzkopff Guardinistr. 63 81375 München Tel: (0163) 172 50 98
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