By the way, I'm thinking that more frequently hang might related with large read/write block in mount_nfs -r/-w (I use 8192, original is 1024).
That's certainly possible since non-default settings don't get as much testing. It would be good to get a traceback.
Has it even been considered to up these values to something bigger??
Reason I ask, is since some discussions from a year ago tempted me to do some (non-scientific) NFS performance testing. (http://witahgen.dyndns.org/FreeBSD/nfs-performance/)
Ever since then I'm of the opinion that sizes of read/write should be at least 8K, or bigger depending on the data.
And yes, I'm aware that bonnie can hardly be considered a serious benchmark tool. But I would think that the results would warant at least this change.
I no longer have some of the hardware, so redoing this test with something like 'make buildworld' is not really possible. But I'm looking into getting again a series of older boxes to run some more tests on.
--WjW
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