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- From: adelman@TGV.COM (Kenneth Adelman)
- Newsgroups: vmsnet.networks.tcp-ip.multinet
- Subject: Re: Undocumented NFS Netcontrol commands
- Message-ID: <921229145621.206000cc@TGV.COM>
- Date: Tue, 29 Dec 92 14:56:21 PST
- Organization: Info-Multinet<==>Vmsnet.Networks.Tcp-Ip.Multinet Gateway
- X-Gateway-Source-Info: Mailing List
- Lines: 43
-
- > I just upgraded to Multinet V3.1 and I noticed that NETCONTROL NFS
- > has some commands which I didn't see in the manual. The commands
- > are RECORD-RESPONSE-TIMES and SHOW-RESPONSE-TIMES. Since we are
- > very interested in NFS server performance these new commands look
- > like they might be of interest to us, but RECORD-RESPONSE-TIMES
- > gives an "?Unknown error" when I give it any parameter and
- > SHOW-RESPONSE-TIMES just returns:
- > < NFS server response times:
- > < OK
- > NFS>
-
- > Are these commands really implemented? Are they designed as Server or
- > Client commands?
-
- No, they require a special compilation conditional in the NFS Server
- which turns on the statistic gathering code. We use it for internal
- debugging.
-
- > I also have another question about the NFS server on V3.1. I saw in the
- > documentation that we can define a "cluster alias IP address" for
- > automatic fail-over of NFS service. It wasn't clear to me exactly how
- > and where this is defined. Specifically I would like one node of my
- > cluster to be the master NFS server, but if that node crashes I would
- > like another specific node to pick up the alias. How do I tell Multinet
- > that VAX5 for example should start answering the IP alias address and
- > that VAX9 should be the backup node?
-
- You define them by specifying a (new) IP address in MU CONFIGURE
- with SET IP-CLUSTER-ALIASES. For example, put a new node in your
- DNS called "vax-5-9" and give it a new IP address. Have both machines
- list this IP address in their IP-CLUSTER-ALIASES and then mount your
- NFS filesystems using this new name.
-
- There is no way to "specify" a primary vs. backup node, but the
- trick we use is to use NETCONTROL to "release" the alias. On your
- primary node, in the boot do:
-
- $ mu netcontrol /host=vax9 cluster release all
-
- (this presumes you also use MU CONFIG/SERVER on VAX9 to give VAX5
- access to the NETCONTROL service).
-
- Ken
-