why not keep going?

Robert Weber Robert.Weber@Colorado.EDU
Fri, 17 May 2002 11:31:57 -0600

I only wish I could go commercial, but here at on the ivory tower everyone
is cheap.  Plus, the backups are going to a FreeBSD system anyway.  What
about "b" keep going?


> On Fri, 17 May 2002 Robert.Weber@Colorado.EDU wrote:
> > a) copy files to /tmp before doing the sig
> the problem with copying is that the file can be modified even while being
> copied.  the window is smaller, but it's not 0.
> for large scale backups you should consider a snapshot-capable volume
> manager.  i'm assuming you're on solaris, and unfortunately i think your
> only choice there may be the commercial vxvm (veritas).  linux has LVM and
> EVMS which can also do this.  some disk arrays are also capable of
> creating snapshots.
> snapshots are read-only versions of a volume at a particular instant in
> time.  they require only enough disk space to keep track of the changes
> since the snapshot began -- the volume manager uses copy-on-write
> semantics to keep a copy of each block that's written in the master.
> -dean
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Status: by weberr Fri May 17 11:30:45 2002