Hi,

I presume you are aware of slapo-accesslog(5) ?

Thanks,

Gavin.

On 7/16/07, Kelly, Terence P terence.p.kelly@hp.com wrote:

Hi,

Question 1:

Is there any documentation available on the OpenLDAP access log format? I wasn't able to find any via Google or on the OpenLDAP Web site.

I looked at how ldap-stats.pl version 5.2 parses logs but I see discrepancies between the operation counts returned by ldap-stats and counts obtained by independent means (e.g., simple AWK scripts), so I'm not very confident that it's doing the right thing.

I can try to reverse-engineer the log format but if there's good documentation and/or a good parser out there I'd prefer that.

Question 2:

My goal is to replay traces of accesses to an LDAP server to a replica of the server itself. I want the exercise to be reasonably realistic, e.g., I want to achieve the same throughputs and level of concurrency as the real server. At the moment I'm planning to write my own trace-replay tool.

I have investigated two trace-replay tools: dupetrace.pl and slamd. The former passes the buck to a shell utility which probably won't achieve the performance I need; the latter seems formidably difficult to set up and use.

Are you aware of any LDAP trace replay tools that are as capable yet as simple as httperf?

Many thanks for any pointers you can provide!

slamd isn't that difficult to setup and I can recommend it for load testing. I've never used the log-replay stuff, however.

The openldap transaction logs are going through syslog, a single transaction can go over many lines, and the return code for that transaction is on yet another line; So you have to be careful when parsing them with line-oriented tools such as awk and perl. :) (be especially careful when syslog rotates and you have conn's that span over the rotation)