Dump on large file systems

[Hornet]

On 8/14/05, John Pettitt <jpp at cloudview.com> wrote:
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> I tried to dump a 600gb file system a few days ago and it didn't
> work.  dump went compute bound during phase III and never wrote any
> data to the dump device (this on an up to date  RELENG_5 box).  - is
> this a known problem? Are there any work arounds?
> 
> John
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If you are dumping that 660G slice to a file, you will need to split
it up into smaller chuncks.

dump -0auLf - / | split -a4 -b1024m - "patth/to/dump/file."

The above line will create 1G files and append the filename (see the
trailing ".")
eg.. 20050815-root.aaaa
20050815-root.aaab

You can also gzip it, but this makes the backup take a long time.
dump -0auLf - / | gzip | split -a4 -b1024m - "patth/to/dump/file.gz."

-Erik-