9

Probably a FAQ but I haven't found anything useful after a while of searching:

Can I set up NFS in such a way that every single error (e.g. server CPU, hard disk, hd controller, network adapter, network cable, power supply) is masked without any need for immediate intervention?

I have only answers for parts of the problem: RAID, redundant power supply, redundant network adapters

How do I address CPU failure of the NFS server so that clients fail over transparently?

migrated from superuser.com May 29 '11 at 12:34

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9

You could buy a system that can tollerate a CPU failure, or you could implement more than one server. You can create an NFS failover cluster fairly easily on Linux (I'm sure Sun et all have a mechanism for this too).

A fairly well supported/common way to do it is with heartbeat, (first link I found on Google, search NFS and heartbeat) to manage the cluster and then share the storage between the servers. The important thing to do with NFS to ensure a transparent failover is to also share the NFS state information which is usually in /var/lib/nfs. You can do that by putting it on the shared storage.

edit: Also setting the fsid option to the same value on the NFS export on each server will prevent you from getting stale file handles when the cluster fails over.

4

nfs 4.1 supports pNFS, which is clustered. http://www.pnfs.com/

0

Nfs 4.1,never tried but i heard is possible a active/active cluster. Nfs classic active/active is impossible as i know,is possible a active/passive cluster,drbd and nfs and pacemaker or better hearbeat. Here's a nice how to, fast and simple Setting Up A Highly Available NFS Server | howtoforge.com

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