Time to move away from Berkeley DB

[Ondřej Surý]

Bron,

would it be possible to release twoskip as a library with stable API and
ABI (and proper SONAME), that might help other projects that need reliable
K/V storage, but don't need a superfast operations.

I agree that sasldb2 propably don't need a support for storing zillions of
records, so twoskip might be a good choice.

Ondrej


On Wed, Jul 3, 2013 at 6:29 AM, Bron Gondwana <brong at fastmail.fm> wrote:

> On Tue, Jul 2, 2013, at 11:37 PM, Howard Chu wrote:
> > Dan White wrote:
> > > On 07/02/13 09:58 +0200, Ondřej Surý wrote:
> > >> Hi,
> > >>
> > >> you might have noticed that Oracle has released Berkeley DB 6.0, and
> in
> > >> unfortunate move they relicensed the BDB to AGPLv3 which makes it
> > >> incompatible with anything else than AGPLv3 or GPLv3.
> > >>
> > >> E.g. this makes cyrus licensing incompatible with Berkeley DB 6.0
> since it
> > >> would require dual licensing which I hardly think makes sense.
> > >>
> > >> Thus I think it's time to kill the Berkeley DB support in
> cyrus-imapd-2.5,
> > >> and start thinking about the replacement for cyrus-sasl sasldb (would
> > >> skiplist work here? or should we use sqlite3, kyotocabinet or anything
> > >> else?).
>
> We could also look at porting twoskip across from cyrus-imapd.  it's not as
> fast, but it's super-safe.  64 bit.  Checksums.  Fast crash recovery and
> total data integrity against any possible crash scenario.
>
> Not safe against random disk corruption, but it will tell you about it!
>
> http://opera.brong.fastmail.fm/talks/twoskip/
>
> > > With regards to cyrus-sasl, Lightining DB is another option:
>
> I'm also very interested in Lightning.  The only issue is that it has
> multiple files per DB by my last reading.
>
> > >
> http://lists.andrew.cmu.edu/pipermail/cyrus-sasl/2012-March/002479.html
> > >
> > > It's released under the OpenLDAP Public License, which I assume is
> > > compatible since ldapdb is released under the same license.
> >
> > Updated patch posted last October.
> >
> >
> http://lists.andrew.cmu.edu/pipermail/cyrus-sasl/2012-October/002541.html
> >
> > Sorry, I wasn't aware of this mailing list until today.
> >
> > SQLite is horrible, has no multi-process support. Even with LMDB
> underneath
> > it's far from tolerable. Kyoto Cabinet leaks like a sieve.
> > http://www.anchor.com.au/blog/2013/05/second-strike-with-lightning/
>
> Thanks for the link.  I'll have a look :)
>
> Bron.
>
>
> --
>   Bron Gondwana
>   brong at fastmail.fm
>



-- 
Ondřej Surý <ondrej at sury.org>
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