Re: slapd, bdb, 32-bit -> 64-bit

[Howard Chu <hyc@symas.com>]

Frode Nordahl wrote:
> Hello,
>
> I am trying to use a slapd BDB database created on a 32-bit intel system 
> on a 64-bit (amd64/EMT64) system. Running slapcat on the database works 
> fine, but when the server is started, ldapsearch is unable to find 
> anything.
>
> I understand that there are architectural differences between a 32- bit  
> and 64-bit systems, but I don't think Berkeley DB have any problems with 
> having its data being interchanged between the platforms.

No, this won't work. On a 64 bit build the entryIDs in the database are 
64 bits. You must export to LDIF and re-import the DB.

I spent a lot of time thinking over this decision; whether to keep 
entryIDs 32 bits wide for 64 bit builds. Ultimately I decided that 64 
bits was better. We have a deployment that has upwards of 3 billion 
entries, and they add/delete millions of entries per day, so restricting 
things to only 4 billion entryIDs would have been too much of a restriction.

I note that most other directory servers are restricted to 32 bits here, 
and they are simply unable to scale out to the numbers that we manage.

--
  -- Howard Chu
  Chief Architect, Symas Corp.  http://www.symas.com
  Director, Highland Sun        http://highlandsun.com/hyc
  OpenLDAP Core Team            http://www.openldap.org/project/