On 04/10/2009 06:46 AM, Domenico Viggiani wrote:
I know that Veritas SF does it but I'd like to know if there is some RH
Linux native solution.
Would UnionFS work here? I've read in the man page for mount that you
can have a filesystem appear at multiple mount points, though I've never
tried it.
So, you might be able to overlay some slow storage on top of some fast
storage's mount, and then rsync the unchanged files to a second mount
point with a cron job based on mtime and --delete.
You'd have to work out the write semantics with unionfs, so that your
new writes go to your fast storage. This looks like it might be a
useful primer:
http://www.linuxjournal.com/article/7714
though I'll have to put it in my TO_READ queue for now. Please put your
scripts on sourceforge if it works. :)
-Bill
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