Re: [uml-devel] Dynamic remount with variable COW stacking/merging needed, support for snapshot repilication

[BlaisorBlade <blaisorblade_spam@yahoo.it>]

Alle 22:13, sabato 17 gennaio 2004, Stephen D. Williams ha scritto:
> When a UML instance is running a always-on service, such as a web
> server, an administrator needs to be able to make live backups, or
> replications, of a running system.
>
> This can be done using LVM snapshots, although that is not always
> appropriate for just this feature. A UML instance can be paused and then
> restarted, but this can cause severe delays while large partitions are
> replicated.
In general, this should be done with LVM. There is a strong idea that COW is 
somehow a duplication of LVM, and I read that Jeff Dike (IIRC) wanted it to 
be rewritten as a new snapshot format for LVM (the reason for a different 
format is that LVM snapshot were built thinking to partitions, while Uml can 
use sparse files - which is a great advantage if you're able to use it).

It's maybe harder to setup, that's true, but see about EVMS which provides a 
nicer interface.

Bye
-- 
cat <<EOSIGN
Paolo Giarrusso, aka Blaisorblade
Linux Kernel 2.4.23/2.6.0 on an i686; Linux registered user n. 292729
EOSIGN



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