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- Path: sparky!uunet!sun-barr!ames!data.nas.nasa.gov!taligent!apple!ntg!dplatt
- From: dplatt@ntg.com (Dave Platt)
- Newsgroups: comp.protocols.appletalk
- Subject: Re: Some interesting AUFS problems
- Message-ID: <1992Aug27.175335.10594@ntg.com>
- Date: 27 Aug 92 17:53:35 GMT
- References: <ROUILJ.92Aug24151134@dl5000.bc.edu> <JAAPJL.92Aug26170100@cmb00.larc.nasa.gov>
- Organization: New Technologies Group, Inc. Palo Alto CA
- Lines: 40
-
-
- > 2) We automount the home directories for users. However, when I
- > attempt to AUFS mount the automount point, chooser quits with an
- > error #4. Note that the automount directory appears to be a read
- > only directory. How do I get this point to mount properly.
- >
- >Our evidence seems to indicate that AUFS doesn't deal with NFS-mounted
- >filesystems. Our workarounds have been to start AUFS on every system
- >that a Mac user has files on, or to move all the Mac users' home
- >directories to one system, which then runs AUFS. We'd also be interested
- >in any fixes for AUFS for NFS.
-
- My experience was that CAP (pl100) did not work well with NFS-mounted
- filesystems when running under SunOS 4.1.1. This was apparently due to
- some locking-daemon problems in SunOS - both the CAP machine and the
- NFS-service machine would spit out error messages on their console, and
- AUFS would not function reliably.
-
- We used a similar solution to J Lee's; I simply installed EtherTalk and
- the AUFS portions of CAP on every workstation which had home directories
- which we wanted to publish.
-
- There's another advantage to doing this - performance. Running AUFS on
- an NFS-mounted filesystem generates at least twice as much network
- traffic as running it on a local filesystem, and usually much more than
- that (due to the stateless, no-client-side-cacheing, server-must-flush-
- all-writes-to-disk-immediately nature of the NFS protocol). AUFS-over-
- NFS is perceptibly slower (to the Mac user) than AUFS-on-a-local-disk,
- and it puts a much greater strain on the home filesystem.
-
- In SunOS 4.1.2, the locking problems seem to have been fixed. I'm
- currently "publishing" several users' home directories to the Mac world
- via an AUFS server on one machine, which is NFS-automounting the home
- filesystems on another workstation which is not [yet] running AUFS.
-
-
- --
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