v6 header format and differential backups

Technical support and discussion of Newsbin Version 6 series.

v6 header format and differential backups

Postby XBrit » Sat Jun 18, 2011 5:48 pm

Hey gurus.

Newsbin v5 is not friendly to differential disk backups. My SPOOL_V1 directory is about 35GB, which is probably far from the largest out there. Every time I read the latest headers in a.b.erotica and a couple other large-ish groups, it shuffles (just renames?) every directory for the groups in SPOOL_V1. Then my next differential backup backs up all 35GB, even though I think hardly any of it has really changed.

This kind of wastes disk space on my NAS box. Will v6 improve this at all?
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Re: v6 header format and differential backups

Postby itimpi » Sat Jun 18, 2011 6:18 pm

No - if anything it is likely to make it worse.

I would suggest you exclude the spool folder from any backups.
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Re: v6 header format and differential backups

Postby XBrit » Sat Jun 18, 2011 7:16 pm

itimpi wrote:No - if anything it is likely to make it worse.

I would suggest you exclude the spool folder from any backups.


LOL, but I don't want to lose that spool data if my RAID-0 crashes! Took a long time to download all that stuff.

Anyway, whatever. I can live with it. Just asking.
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Re: v6 header format and differential backups

Postby Quade » Sat Jun 18, 2011 7:30 pm

it shuffles (just renames?) every directory for the groups in SPOOL_V1. Then my next differential backup backs up all 35GB, even though I think hardly any of it has really changed.


I don't get what you're talking about here. The names don't change in the spool_v1 folder. Maybe you mean timestamps.
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Re: v6 header format and differential backups

Postby XBrit » Sat Jun 18, 2011 11:30 pm

Quade wrote:
it shuffles (just renames?) every directory for the groups in SPOOL_V1. Then my next differential backup backs up all 35GB, even though I think hardly any of it has really changed.


I don't get what you're talking about here. The names don't change in the spool_v1 folder. Maybe you mean timestamps.


Yes, very possibly. That would also be enough to provoke a full backup when differential was requested.
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Re: v6 header format and differential backups

Postby DThor » Sun Jun 19, 2011 8:04 am

Just as a recommend, if you're at the point where you're concerned over the volume of spools, which I can certainly see for many, then I would definitely exclude them. Constantly backing up many gigs of data that will always exist out there to cover the unlikely event of a drive crash, well, that's a lot of bit moving for not a lot of benefit. Especially when the solution is as simple as hitting a button plus time, it's not like it's some unique data that is difficult to reproduce. Just sayin'...

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