Based on discussion generated by a post yesterday regarding Sun GbE performance and NetApp filers, I had a question about the nfs.tcp.enable option. I have heard that once you enable this, it is impossible to switch back to UDP; is this true? I don't really have any filers I can test this on, and I'd rather not find out that switching to TCP doesn't fix my problem but I can't go back to UDP.
Thanks,
Geoff Hardin geoff.hardin@dalsemi.com
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On Wed, 12 Jun 2002, Geoff Hardin wrote:
Based on discussion generated by a post yesterday regarding Sun GbE performance and NetApp filers, I had a question about the nfs.tcp.enable option. I have heard that once you enable this, it is impossible to switch back to UDP; is this true? I don't really have any filers I can test this on, and I'd rather not find out that switching to TCP doesn't fix my problem but I can't go back to UDP.
If you use only static mounts, then you can enable TCP and nothing on your clients will change unless you explicitly unmount and remount. For safety, you could even go update your client fstabs to explicitly use UDP except on one or two test machines, for safety...
If you use an automounter, things could get tricky. :-) But you should be able to enable TCP, try it out, and then turn it back off later if you're careful about making sure that the clients have all reverted to UDP.
One thing you reeeeeeally don't want to do is accidentally confuse the nfs.tcp.enable and nfs.v3.enable options. Just trust me on that one.
-- Chris "Mr. Fatfingers"
-- Chris Lamb, Unix Guy MeasureCast, Inc. 503-241-1469 x247 skeezics@measurecast.com
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Chris Lamb -
Geoff Hardin