Edward Ned Harvey <[email protected]> wrote:
> If it's unattractive to "zfs send | zfs receive" with either removable media
> or an additional server, then you should "zfs snapshot" and use some
> removable-splittable-media-friendly backup tool such as they've named. Tar,
> cpio, netbackup, etc.
I cannot speak for netbackup, but nither cpio nor "tar" are
removable-splittable-media-friendly.
Star implements a reliable multi-volume feature and
- checks whether the correct followup medium is used
- but also allows to read back any simgle medium from a
set of multi-volume media.
This is because star implements unique media signatures, data to verify whether
a medium stars at the expected offset with the expected volume serial number and
because star because any follow up medium includes a header that allows to skip
to the next regular file start after the rest of a split file.
> If there were something like "zfsdump" and "zfsrestore," it wouldn't manage
> tape changing for you anyway. So such a tool really offers you nothing
> better than tar. If you need tape changing, then I think people use Amanda
> with tar under the hood, right? Or netbackup... Etc.
Amanda is nice, but it ignores the superior multi-volume features from the
backup programs it uses (such ad ufsdump and star).
Jörg
--
EMail:[email protected] (home) Jörg Schilling D-13353 Berlin
[email protected] (uni)
[email protected] (work) Blog:
http://schily.blogspot.com/
URL: http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily
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