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Date:      Tue, 15 Oct 2013 13:53:16 -0600
From:      Eric Browning <ericbrowning@skaggscatholiccenter.org>
To:        FreeBSD FS <freebsd-fs@freebsd.org>
Subject:   What is the NFS max thread limit
Message-ID:  <CAM=5oeBt8o=4zshi46_H-s0TOnP2bnWq1N%2BdLmdQtb5c3HHx7w@mail.gmail.com>

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I'm currently still debugging slow NFS performance on mac clients.  Running
9 stable with a mix of 200 Mac OS X 10.8, 10.7 and 10.6 clients.

Periodically I get this error on the mac side:
automountd[1766]: set_and_fake_mapent_mntlevel: subdir=/Contents error:
Contents not found in map=-fstab

I'm wondering with 200 clients with five nfsiod threads (~1000 nfsiod
threads total) am I oversubscribing the nfs server?  I can't seem to
configure any more than 256 threads (nfs_server_flags="-t -n 256").  When I
configure above 256 I get an error about it resetting to 4:

Starting nfsd.
nfsd: nfsd count 512; reset to 4

Tomorrow when all the mac clients have restarted I have changed their
nfsiod threads down to 1 each to see if this is indeed the issue.

Thanks in advance,
-- 
Eric Browning
Systems Administrator
801-984-7623

Skaggs Catholic Center
Juan Diego Catholic High School
Saint John the Baptist Middle
Saint John the Baptist Elementary



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