svnadmin dump on live repository

Hi,
Just curious, is performing "svnadmin dump" on a repository that may
also be accessed by users (over webdav) safe?
Is there any reason it shouldn't be done?

The book doesn't seem to say one way or another. Though I've noticed
users mentioning that their backup solutions involve using
"svn-hot-backup" and then running "svnadmin dump" off the hot backup
rather than the live repository.

Regards
Chris

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