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- From: thompson@PAN.SSEC.HONEYWELL.COM (jt -- John Thompson)
- Newsgroups: comp.sys.apollo
- Subject: re: Need Some Advice..
- Message-ID: <199211102357.AA08416@pan.ssec.honeywell.com>
- Date: 10 Nov 92 23:57:41 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Organization: The Internet
- Lines: 79
-
-
-
- > I have recently inherited responsibility for a network os about 40
- > HP9000/4xx workstations( Domain 10.4 ), and 1 HP9000/710 (HP-UX 8.7)....
- Lucky you. Throw out the 710 and you can ignore that yucky Un*x stuff.
- :-) :-)
-
- > 1) What's the best way to integrate the 710 into the Domain network,
- > i.e. NFS mount the network root onto the 710, mount each using
- > node onto the 710, etc.?
- First, you're breaking semi-new ground here, so there's probably not a single,
- known, "best" way to go. However, you have two things to consider --
- o Accessing the 710(Unix) from the 400s(Domain/OS)
- You are probably best off from a Domain access view if you mount the
- 710's root directory as //HPUX_NAME, using the -root option of mount.
- This allows you to access any file from your Domain machines as
- //machine/local/path/name. I believe you need the Domain name-server
- (ns_helper) running to do this. Ns_helper acts KINDOF like the Unix
- named in offering name resolution services to Domain machines. With
- the 710 mounted in the replicated root (super-root), you can mount it
- with one node, and other nodes will "borrow" the mount point (though
- they need access via the exports file) when they need it, if you have
- the damd (Domain automount daemon) running on the Domain nodes. Note
- that the damd is NOT NOT NOT the same as the Unix automount daemon.
- o Accessing the 400's(Domain) from the 710(Unix)
- It used to be that the recommended answer was to mount the super-root
- (//) of the Domain network from some single node. This is NOT SUGGESTED
- any more, and I've switched allegiance on the issue too. The reason is
- that you bottleneck NFS access through a single point, and force that
- node to do NFS->DDS translations, send the request out to the remote
- Domain node, get the answer back, do a DDS->NFS translation, and finally
- send the answer off to the 710. If you mount each Domain machine
- individually, each machine is responsible for their traffic only. Even
- if you have a token ring that you gateway through, the packet transfer
- is much faster than the protocol conversion PLUS packet transfer. Of
- course, this means that you have to have lots of systems having identical
- exports files, and you have to maintain them as you add more Un*x boxes.
- :-(
- The automounter can alleviate some of the mount hassles that you WILL
- encounter, and if/when you pick up Domain NFS 4.1, you get the automounter
- for that side too, as well as support for NIS (though I haven't used it
- yet myself). You do need to be at O/S 10.4 before using NFS 4.1....
-
- > 2) What would be the best strategy for migrating the Domain network to
- > HP-UX?
- Kick all the users off, throw out the files (since they're typed on the Domain
- nodes) and replace all the machines. Then yell "SURPRISE!" on Monday AM.
- Seriously, this answer is "it depends." How many applications do you run
- that need to stay on Domain/OS, for one reason or another? If you don't have
- many, you might consider the 9000/4xx -> 9000/7xx trade-up program. This
- lets you keep your memory, disks, tapes, ... from the 400 series nodes, but
- puts a 700 series motherboard in the system (running HP-UX 9.0). If you
- need to stay with Domain/OS for an extended time, you may find it better
- to replace the 400s with Un*x boxes as time goes by. The big Qs come up as
- o How many Domain/OS nodes/applications do you need to keep?
- o Where's your administrative knowledge?
- o Where do you do backups? Add users?
- o Are you using ethernet for the Apollos, or ATR? If ATR, how do you
- flip your primary network over to ethernet?
- o How much money do you have to throw at new systems?
- o How much money do you have to throw at helpful USENET people???? :-)
-
- > 3) What is the best way to implement a shared modem pool which would
- > allow dial-in access to the network?
- Beats me. Haven't I answered enough Qs for the day??? :-)
-
- -- jt --
- John Thompson
- Senior Engineer / Sys-Admin
- Honeywell, SSEC
- Plymouth, MN 55441
- thompson@pan.ssec.honeywell.com
-
- If you're not part of the solution, you're part of the precipitate.
- *************************************************************************
- * This e-mail correspondence is a work of fiction. Any similarity *
- * between the views presented and actual views, personal or corporate, *
- * living, dead, or still to be conceived, is pure coincidence. *
- *************************************************************************
-