[Kolab-devel] make kolabd more robust

[Alain Spineux]

On Tue, Nov 18, 2008 at 5:54 PM, Bernhard Reiter <bernhard at intevation.de> wrote:
> On Mittwoch, 15. Oktober 2008, Alain Spineux wrote:
>> > The idea within kolabd is that new users are stored in a local user db
>> > once they are created. If they are not in there the account will be
>> > created. So I wouldn't say it is "transaction less".
>>
>> Yes this is transaction less because kolabd don't
>> use this information even if  it exists. This is too much work to
>> check that all account has it existing mailbox created
>> at each startup ! This was done in the past but was taking hours ! I
>> dont know what is the empyrical system used now,
>> but as shown in the user mailing list some mailbox look to be
>> forgotten sometime.
>
> From my memory kolabd has a faster local database that it will consulte
> for user creating when triggered. So a lost transaction is _not_ a problem.
> Kolabd will check on many changes if all users are there and create
> accordingly, even if the current replication part does not have all
> the changes.
>
>> > The deletion flag exists as all servers need to purge the entry. But for
>> > creation only one server needs to create the account. So the local db
>> > solution should be okay.
>>
>> The deletion flag is not mandatory at all !

I said that to confirm the utility of a creationflag.
A creationflag is not more meaningless than a deletionflag !
None of them are mandatory, but both help in the creation and deletion process.

>
> I was from my perspective for a robust solution to delete stuff
> in the right order from all Kolab Server (e.g. one master, two slaves).
>
>> Kolabd could compare imap mailbox and ldap entries
>> and delete missing items. But this become slow and then "transaction less"
>
> Was probably considered too risky, think about the directory service
> temorarily being in disorder and your precious email folders being deleted...
>
> Bernhard
>
>
> --
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>
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-- 
Alain Spineux
aspineux gmail com
May the sources be with you