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- Path: sparky!uunet!ogicse!uwm.edu!cs.utexas.edu!ut-emx!tivoli!TIVOLI.COM!stuart
- From: stuart@TIVOLI.COM (Stuart Jarriel)
- Newsgroups: comp.sys.hp
- Subject: Re: renaming client & server in a cluster
- Message-ID: <2902@tivoli.UUCP>
- Date: 20 Aug 92 23:48:04 GMT
- Article-I.D.: tivoli.2902
- References: <2A9290C8.27098@orion.oac.uci.edu>
- Sender: news@tivoli.UUCP
- Organization: Tivoli Systems, Inc
- Lines: 37
-
- In article <2A9290C8.27098@orion.oac.uci.edu>, rcaslis@anansi.acs.uci.edu (Russell Caslis) writes:
- |>
- |> I have a cluster of HPs set up here (two 710s, one 720). One 710 is the
- |> server, one is a client, and the 720 is a client.
- |>
- |> The person who I set these machines up for wants to recieve mail at a specific
- |> address which is currently assigned to a client, not the server. According
- |> to what I know, the clients cannot receive mail, only the server can (great
- |> design, huh?).
- |>
- |> So what I want to do is swap the names of the two 710s. I have been told that
- |> there is no way to do this without re-installing the OS. Is there any other
- |> way to do this?
- |>
-
- Well, only partially true. The way the file system is set up, the /usr/mail
- directory is NOT a CDF (context dependant file), so while only one system
- can/should run sendmail, you can read/send mail from any system in the
- cluster. Mail sent to the cluster server will be visible to all the clients
- and the server.
-
- Now, that being said, renaming a system in a cluster is not that big a deal
- until you want to re-name the server. That is hard. Its hard because the
- CDF filesystem keeps some files context based on the name of the system,
- and un-CDF'ing a file system is a very unreliable task. If you want to
- switch the names of the server and a client you will be much happier if
- you re-load. I say that because a re-load and re-cluster will take 2 hours
- (not including the backup and restore of user files and system config files),
- whereas actually changing the cluster file system will take 5-6 hours, and
- may not work when you are done. At my last count there were 60+ CDF files
- in the OS, and you would have to change at LEAST 40 of them. Each CDF can
- have a switch on architecture and another on name.
-
- You comment on design is accurate from the context of re-configuration, but
- it is otherwise a pretty good scheme.
-
- stuart
-