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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