On Saturday 18 March 2006 10:00 pm, Todd D. Esposito wrote:
> That sounds an awfully bad idea. Most (all?) non-networked filesystems
sure, but here we're talking about cluster-aware filesystems (OCFS, GFS, and
others).
> However, on that note, I wonder if you could mount the same file system,
> say something like /usr, into multiple domU's READ ONLY. That could
> certainly save some trouble when updating applications, etc. Anyone tried
> it?
this could certainly be usefull, 'classical' UNIX servers used to have most of
the system mounted read-only, and just some r/w partitions
for /var, /tmp, /home, and such. the r/o is sometimes (not very often)
shared among several nodes in SAN clusters.
obviously, for the vast majority of cases, using the same backing store for
different domU's is a bad idea and should be verified by xm. but there _are_
some cases where it's usefull, and it would be nice if there was some way to
say "Yes, i know it's repeated. Trust me, i know what i'm doing" in the
config file.
--
Javier
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