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- Path: sparky!uunet!cis.ohio-state.edu!ucbvax!PAN.SSEC.HONEYWELL.COM!thompson
- From: thompson@PAN.SSEC.HONEYWELL.COM ((jt) John Thompson)
- Newsgroups: comp.sys.apollo
- Subject: re: Favourite DOMAIN/OS features (or mis-features)
- Message-ID: <199207241945.AA23289@pan.ssec.honeywell.com>
- Date: 24 Jul 92 19:45:22 GMT
- Sender: daemon@ucbvax.BERKELEY.EDU
- Distribution: world
- Organization: The Internet
- Lines: 64
-
-
- > >...
- > >compression?/It can't be done" dialogs on comp.unix.wizards, and wanted to
- > >prove it *could* be done before the possibility slipped away?
- >
- > How do you use the 'compress' feature on DOMAIN/OS? I come from the
- > Unix side of the universe and don't use 'typeing features of the
- > filesystem.
-
- Compress a file using the standard /usr/ucb/compress routine.
- Change the type on it to be compress, by using '/etc/obty pathname... compress'
- Use the object.
-
-
- > * I think the typed filesystem is a nice feature
- > but you pay for it with desparately slow reading and writing from
- > disk. I have here a 2500 with a 760Mb SCSI drive. It's disk operations
- > are 5x slower than a PC running Interacive SVR3.2. Personally, I'd
- > rather have 5x faster disk and do the work in my own program.
- I don't know whether that's the types, the Domain file-system, or a problem
- with your setup. I haven't clocked any disk I/O for comparison. However,
- even granting you the point, I'd take the file system and file types over
- the speed. Otherwise, every programmer has to re-invent the wheel, and
- every programmer will do it differently.
-
- > * The inability to reserve an amount of disk to be used by the
- > operating system for paging is painful. User cheerfully fill up the
- > disks and then wonder why their systems go to sleep. /dev/swap
- > anytime.
- Point granted. Now, let's look at the other side. I have a program that
- doesn't run on our Sun because 90MB of swap isn't enough. I can't get more
- without going through some painful gyrations, and/or reformatting the disk,
- repartitioning, and loading the O/S again. YUCK.
- On the other hand, when I run short of space on Domain/OS, I move a user
- directory, or clean up some space.
- HINT - before your users get to big, create some number of 10, 20, or
- however-many MB files. Lock them away somewhere where people don't
- have rights to look, and then when the users fill up the remainder,
- or you run low on swap, "fix" the problem and look like a hero!
-
- > * Networked filesystem is wonderful. And the lack of YP/NIS.
- NFS4.1 (I hear they changed the 3.0 number to match the ONC(?) release) will,
- of course, have NIS. From what I hear, it handles NIS changes to the registry
- by passing them up to the Domain registry! If so, yippee!
- There have also been many times, now that I'm trying to set up NFS and allow
- all 60+ Domain machines to access the 1/2-dozen Un*x boxes, that I've wished
- for the netgroups capability of NIS. Maybe RealSoonNow....
-
-
- -- jt --
- John Thompson
- Design Services Engineer / Sys-Admin
- Honeywell, SSEC
- Plymouth, MN 55441
- thompson@pan.ssec.honeywell.com
-
- What do I know? I'm just a Token Administrator.
- *************************************************************************
- * 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. *
- *************************************************************************
-
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