Squid caching proxy of the SURFNet network provider is a top level server of The SURFnet Cache Mesh. It is a part of the DESIRE project.

At the time of the experiment the cache server was running on an old IBM RS6000 model 970 using the IBM advanced file-system to create one big virtual disk. The machine will be soon upgraded to a new IBM RS6000 model R50 with multiple caching disks using the normal UFS.

The patched version of Squid (v1.1.15) was run on Tuesday, September 30, 1997.

Warning: This proxy was running Squid with the "double-read(2)" bug that may affect performance of a proxy.

We split our experiments into 6 categories.

1. General
   • Transfer Sizes
   • File Sizes
   • Proxy Traffic Intensity
   • Proxy Response Time
   • Repsonse Time vs. Size
   • Concurrent Requests
   • Hit Rates
   • Request Response Time Components (Misses)
   • Request Response Time Components (200 Hits)

2. Disk
   • Disk Traffic Intensity
   • Concurrent Disk Requests
   • Disk Utilization
   • Disk Response Time
   • Disk Response Time Anatomy
   • Atomic Disk Requests

3. Memory
   • Memory Hit Analysis
   • Hit Classification

4. Outbound Network
   • Concurrent Outgoing Connections
   • Proxy Connect Time
   • Distribution of Proxy Connect Time (Peak)
   • Server Reply Time
   • Server Reply Time vs. File Size
   • Server Response Time

5. Inbound Network
   • Client Connect Time
   • Proxy Reply Time
   • Proxy Reply Time Anatomy
   • Proxy Reply Time Versus File Size
   • Proxy Reply Time Versus File Size (Detailed)

6. Hits
   • Hit Classification
   • Memory Hit Analysis