Justifying FS-Cache

Justifying FS-Cache

Posted Dec 27, 2008 5:54 UTC (Sat) by csamuel (✭ supporter ✭, #2624)
In reply to: Justifying FS-Cache by pkern
Parent article: Justifying FS-Cache

Well, the obvious thing that they could implement caching here aside. Is there some sane way to speed things like /home on NFS up with a local disk?

NFSv4 already has the concept of file delegations (in fact 4.1 includes read-only directory delegations too), where a client which opens a file that isn't being accessed by other systems can be granted a delegation to operate on that file locally and then either commit the final changes to the server when its done or for the NFS server to recall the delegation if another client requests access.

So if you are running an HPC cluster, for instance, and a user runs a code in their home directory by accident (yes, it does happen, sadly) that uses a lot of temporary files then ideally the server will be able to delegate access to the client and they don't need to do any of their I/O over NFS..

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