Hi all,
Currently I am involved in an activity that deals with measuring performance of OpenLDAP on Solaris 10 - x_86 machine.
Hardware Specs -
1. Two identical servers (Servers 'NodeA' and 'NodeB') with the following configuration:
* Sun Fire X4200 M2 x64 Server
* 2x AMD Opteron Model 2220 (2.8GHz/1MB) processor
* 1x 4GB PC2-5300 DDR2-667 memory
* 2x 146GB HDD 15K RPM (Hardware RAID-1, so available disk space is 146 GB).
2. One server 'NodeC' is used as a traffic injector and has the following hardware configuration:
* Sun Fire X4200 M2 x64 Server
* 2x AMD Opteron Model 2218
* 4x 2GB PC2-5300 DDR2-667 memory
* 4x 73GB HDD 10K RPM.
Software installation common to all servers:
1. JDK 1.6
2. Symas CDS Version 3.9.3
For traffic injection, SLAMD v2.0.0-alpha1 is installed on NodeC.
Both Node A and B are Mirror-Mode replicas.
The database is having 1 Million subscribers and both the cache sizes are set as follows in slapd.conf :
cachesize 250000
idlcachesize 250000 i.e 25% of the subscriber base.
Two identical SLAMD SearchRate Jobs, one pointing to Node A and other to Node B are run from Node C.
However, there is a wide difference in the number of lookups/sec performed in both the servers.
The read rates obtained vary in the ratio of 1:7 or so on both the servers.
I am using 1 SLAMD client and 2 threads for targeting on 1 server.
If I increase the number of thread, SLAMD starts reporting exceptions.
Please suggest a way by which Predictable/ similar read rates could be achieved on both the servers as both being exactly same.
Thanks a ton in advance for suggesting a solution.
Regards
Shilpa Sethi
A R I C E N T
Plot 6, Electronic City,
Sector - 18,
Gurgaon 122015
Haryana, India
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