>> 1. Separate directory from account data . . . perhaps using refers of
>> some sort to "make it look" like they're all one server/service.
>> Directory stuff is by far the most intensely searched, updated, and
>> involves "unusual" queries instead of a simple "give me this one
>> entry,
>> thanks".
Splitting up your DIT can give some performance improvements if you
have separate storage for each part. back-meta may also give you some
flexibility options. You may also want to review your indexing
options.
>>
>> 2. Is Solaris causing too much of a bottleneck I/O wise? It seems
>> to be
>> notorious for having slower I/O than Linux, so I'm wondering if
>> that's
>> part of my problem. This is Solaris 8 btw.
>>
Solaris 9 started huge updates to the disk system and Solaris 10 keeps
it going. (Although they were always faster than linux, in my
opinion) Upgrading to Solaris 10 will give you a boost for free.
If you want to stick with solaris 8, there are a lot of articles out
there about tuning solaris disks with fsflushr-related settings. Look
at docs.sun.com for solaris 8 /etc/system tunables. Even if you
upgrade, you should look into your OS tunables for such an I/O-intense
service as ldap.