Apache Tuning

The goal of this page is to give some details about Apache tuning for Nebulous.

Intro

We use the following mpm_prefork_module configuration.

<IfModule mpm_prefork_module>
        StartServers            5
        MinSpareServers         5
        MaxSpareServers         10
        MaxClients              150
        MaxRequestsPerChild     10000
</IfModule>

I wrote a small utility script that starts nbProcesses processes. Each process attempts to create nbFiles files in Nebulous using neb-touch. To ensure that files do not previously exist in Nebulous, each instance of the utility script is called with an index argument (let's call it experimentNb). Each experiment is run this way:

  python startNebFilesCreation.py <experimentNb> <nbProcesses> <nbFiles>