From kde-pim  Fri Dec 16 08:13:46 2011
From: Volker Krause <vkrause () kde ! org>
Date: Fri, 16 Dec 2011 08:13:46 +0000
To: kde-pim
Subject: Re: [Kde-pim] Data loss: kmail2 must not use existing [Folder-xy]
Message-Id: <1571602.3uN61ndSud () vkpc9>
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On Thursday 15 December 2011 22:38:10 Sven Burmeister wrote:
> Am Donnerstag, 15. Dezember 2011, 21:45:46 schrieb Ingo Kl=F6cker:
> > We don't need GUIDs for every item. We only need them for folders.
> > Creating GUIDs for folders will hardly result in a performance prob=
lem
> > and changing the format of an id shouldn't require massive code cha=
nges
> > either. Of course, it might require an upgrade mechanism.
> >=20
> > The usage of GUIDs is the only sensible solution for external
> > references.
>=20
> I am no expert regarding akonadi. So I'm not sure this covers all kin=
ds of
> resources and interaction with clients. But for email it sounds sensi=
ble to
> me since there is no email without folder.
>=20
> If I understood Volker correctly introducing the communication of a u=
nique
> id to identify the database needs a lot of code changes.=20

Adding just that identifier is trivial, using it all over the place (li=
ke=20
proposed as a config file/key prefix for example) is the part I'm not h=
appy=20
with.

> Your proposal not.

At least not as long as it fits into 64bit (or we are allowed to break =
SC).

Randomizing collection ids should also have little impact on the perfor=
mance,=20
bulk operations on collections are far less common, and there's usually=
 a lot=20
less of them than we have items.

regards
Volker
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