This is why snapshots were invented.
Michael Locher wrote:
Ivan, thanks for commenting on this.
Am 23.11.2004 um 13:12 schrieb Ivan Rayner:
You seem to be of the opinion that you can't create a backup of a live
filesystem. My guess is that you assume a backup is a strict snapshot in
time of the filesystem -- it isn't.
But it could be... it would be a nice feature to have, tough i am sure
it is not trivial to implement.
If a file is removed or created while a xfsdump is running, then it
may or
may not be included in the dump. This is OK, because in tomorrow night's
incremental backup the file will then be included or removed as
appropriate. If you have a 24hr schedule then you should assume that the
cycle starts when xfsdump starts. Anything that happens while xfsdump is
running will be guaranteed to be on the following dump, but if you're
lucky then it will make it in the current dump.
What happens if a large file (eg a multi GB database file) is modified
during the dump.
Will it be consistent? i.e are write operations allowed on a file when
its data is dumped?
Michael
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