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I have the following NFS-based storage setup:
Computes nodes are Linux. The NFS servers are Solaris. A not-so-important user runs a bunch of read intensive jobs on a subset of the compute nodes. As a result, the whole group of compute nodes becomes very slow ( How to implement quality of service (QoS) limiting the NFS bandwidth to nodes, processes, or users?
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QOS is normally used to give priority to certain types of network streams. Can't you isolate and limit the user's port on the network switch? Or put him/her in a separate VLAN? Or limit the port's data rate to 100MBps? Other than that I am not aware of any NFS bandwidth limitation by username or MAC address. Maybe your NFS server has options to ensure a more distributed way of serving file requests? Thinking out of the box: move the read-intensive files closer to the user and run a backup/rsync process to write the updated data back to the NAS? What kind of read-intensive jobs are these anyway? | |||
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