Changing databases at runtime

[Simon Matter]

Tarjei Huse schrieb:
> 
> <(snip)>
> > > 'worse' as new backends are implemented, the ability to build a
> > > compiled version of Cyrus that could find and use whatever database
> > > format it can see (or failing that, whatever database some separate
> > > utility can see and then edit into the config files), would probably
> > > help reduce the "I upgraded Cyrus to the latest package, and
> > > everything broke" type of posts -- which in some cases have reportedly
> > > led to users giving up on Cyrus altogether.
> > At least my RPM packages do exactly this. I have put much effort in
> > creating packages which have build time options for DB backends and DB
> > conversion is performed automagically on the fly while
> > installing/upgrading/restarting. I didn't get any feedback until now
> > about this feature so I expect it works for most people :)
> > If it doesn't work, let me know.
> 
> Your packages are great! However, it would be a nice feature to have
> some sort of "recompile.conf" file that could be used for upgrades. I
> chenged most of my db's to skiplist before I got things working. Now, if
> I recompile without thinking (a bit stressed for some reason) I might
> just happen to create loads of work. Therefore it would be nice to have
> a simple way to keep settings between version - unless you realy want to
> change things.

Why don't you simply create yourself a build script with your preferred
options? Something like:

#!/bin/sh

rpmbuild --rebuild --define='SEEN_DB skiplist' --define='IDLED 1'
cyrus-imapd-${1}.src.rpm

And the call it with 'mycyrusbuild 2.1.10-4'

Simon

> cheers,
> tarjei
> 
> > Simon
> >
> > >
> > > I don't know for sure whether a simple and reliable package upgrade is
> > > worth "a (small) performance penalty" for the average user of a
> > > pre-packaged (RPM or .deb) Cyrus, but I suspect it might well be.  And
> > > over time, such sites may become the majority of Cyrus installations.
> > >
> > > This probably isn't something of great utility to CMU, but for the
> > > average Linux sysadmin who just wants to grab an RPM or a .deb and
> > > install it and have Cyrus "just work", upgrading as new RPMs/.debs are
> > > released, it could be a big deal in the long run.
> > >
> > > Jonathan
> > > --
> > > Jonathan Marsden        | Internet: jonathan at xc.org     | Making electronic
> > > 1252 Judson Street      | Phone: +1 (909) 795-3877      | communications work
> > > Redlands, CA 92374      | Fax:   +1 (909) 795-0327      | reliably for Christian
> > > USA                     | http://www.xc.org/jonathan    | missions worldwide
> 
> --
> Med vennlig hilsen
> Tarjei Huse
> 
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