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AW: Does fsfs revprop packing no longer allow usage of traditional backup software?

From: Markus Schaber <m.schaber_at_3s-software.com>
Date: Fri, 1 Jul 2011 08:51:43 +0200

Hi, Daniel,

> Von: Daniel Shahaf [mailto:d.s_at_daniel.shahaf.name]

> > It should be easy to implement editing revprops without using
SQLite:
> > in case someone modify revprop non-packed revprop file is created,
in
> > read operation non-packed revprop file should be considered as more
> > up-to-date. In next svnadmin pack operation these non-packed files
> > should be merged back to packed one. Daniel, is it makes sense for
> > you?
>
> So you want the unpacked shard to be preferred to the packed one when
both
> exist.
>
> But when you have just finished packing a revprops shard, you have to
> increment db/min_unpacked_revprop before deleting any revprop shards

---
> and during that window, both the unpacked shard and the packed shard
> exist, but you need to prefer the packed one.
Why? For read access, both shards are supposed to have the same
contents. And write access (revprop changes) could be blocked for that
short window during a repo packing operation.
Best regards
Markus Schaber
Received on 2011-07-01 16:20:58 CEST

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