Fwd: [OpenAFS] best practice for salvage

[Jeffrey Altman]

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Esther Filderman wrote:

> Because of the
> cruft that would sometimes get left behind in volumes due to things
> like crappy fortran compilers

Anything left behind by an application accessing an AFS volume would
be stored in the volume.  Salvager would not be involved in cleaning
it up.  Salvager is the AFS volume equivalent of DOS chkdsk and UNIX
fsck.  It is used to ensure that the internal volume data structures
are consistent and attempt to make repairs when they are not.

If there were such a situation that would permit a Fortran compiler
running on an AFS client to corrupt the data on the server's local
disk, that would be an extremely serious problem as it would mean that
anyone could corrupt the data on the server by issuing the correct
sequence of AFS RPCs.

In my opinion Salvaging is not an operation that needs to be performed
on a regular basis just as weekly shutdowns are no longer required.
Weekly shutdowns are only necessary if there are bugs in the services
that result in them leaking resources.  If the code is correct they
are unnecessary.

If anyone has evidence that weekly restarts are necessary, please
file the necessary bug reports so that the errors can be corrected.

Jeffrey Altman

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