--On Monday, September 02, 2013 12:22 PM -0600 Brent Bice bbice@sgi.com wrote:
I'm trying out the mdb backend before converting several of our LDAPservers to it and have a few questions I haven't found answers to yet.
OpenLDAP version?
Firstly, I found when I spun up an instance using MDB that I couldn'thave more than 1000 leaf nodes. It appears when I tried to create the 1001st leaf node, one of the earlier nodes disappeared. Is this a known limitation or just a config option I don't see in the slapd-mdb man page? Right now my config just contains:
database mdb masxize 2147483648 suffix "dc=mysuffix,dc=com" rootdn "cn=Manager,dc=sgi,dc=com" rootpw myrootpw directory /data/ldap/instance-v1.4/var/openldap-data [... a bunch of indexes ...] checkpoint 1024000 60
This is not a valid back-mdb parameter. I would suggest re-reading the man page.
The total size of the DB was only 412 megs so far and each of threebranches in the DB appeared to be limited at 1000 leaf nodes so I don't think I was just hitting a maxsize limit.
I have DBs with hundreds of millions of objects, without issue.
Which leads me to the 2nd question... The maxsize option (accordingto what I've read) is the maximum size of the database in bytes. But it looks to me like the biggest value I can specify is 4G - the biggest value for an unsigned long. Would this be cuz the system I'm testing on is a 32bit version of linux? (unsigned long is only 4 bytes whereas on a 64 bit OS unsigned longs are 8 bytes)
I would advise using a 64-bit OS with MDB.
--Quanah
--
Quanah Gibson-Mount Lead Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration