On Fri, Mar 19, 2010 at 11:57 PM, Edward Ned Harvey
<solar...@nedharvey.com> wrote:
>> 1. NDMP for putting "zfs send" streams on tape over the network. So
>
> Tell me if I missed something here. I don't think I did. I think this
> sounds like crazy talk.
>
> I used NDMP up till November, when we replaced our NetApp with a Solaris Sun
> box. In NDMP, to choose the source files, we had the ability to browse the
> fileserver, select files, and specify file matching patterns. My point is:
> NDMP is file based. It doesn't allow you to spawn a process and backup a
> data stream.
>
> Unless I missed something. Which I doubt. ;-)
5+ years ago the variety of NDMP that was available with the
combination of NetApp's OnTap and Veritas NetBackup did backups at the
volume level. When I needed to go to tape to recover a file that was
no longer in snapshots, we had to find space on a NetApp to restore
the volume. It could not restore the volume to a Sun box, presumably
because the contents of the backup used a data stream format that was
proprietary to NetApp.
An expired Internet Draft for NDMPv4 says:
butype_name
Specifies the name of the backup method to be used for the
transfer (dump, tar, cpio, etc). Backup types are
NDMP Server
implementation dependent and MUST match one of the Data
Server implementation specific butype_name
strings accessible
via the NDMP_CONFIG_GET_BUTYPE_INFO request.
http://www.ndmp.org/download/sdk_v4/draft-skardal-ndmp4-04.txt
It seems pretty clear from this that an NDMP data stream can contain
most anything and is dependent on the device being backed up.
--
Mike Gerdts
http://mgerdts.blogspot.com/
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