June 2001
Intermediate to advanced
320 pages
9h 18m
English
Content preview from Web CachingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Sample Benchmark Results
This section contains results from a Web Polygraph benchmark of a Squid cache. The data shown here is not an official Polygraph result, but it uses the same PolyMix-3 workload that we used for the third industry Cache-Off.
For this test, Squid is running on a Compaq Proliant system with an Intel Pentium III/450 processor, 1GB of RAM, six 9GB SCSI disks, and an Intel fast Ethernet interface. The operating system is FreeBSD-4.1 with a kernel specifically tuned for Squid. The Squid version is 2.4.DEVEL4.
PolyMix-3 has three input parameters: cache size, peak throughput, and fill rate. For this test, the cache size is 41G B, the peak throughput is 130 requests per second, and the fill rate is 115 requests per second. Another characteristic of the workload is its different phases. PolyMix-3 has three interesting phases: fill, top1, and top2. There are actually transitional phases in between, but we won’t discuss them. The fill rate is the request rate during the fill phase, which can be different from the peak throughput for the top phases. During the fill phase, the hit ratio is only 5%, whereas it is about 57% during the top phases. During the fill phase, the cache is mostly writing objects to disk, with relatively few reads. Thus, a cache may be able to support a higher throughput during the top2 phase, when it is reading more and writing less than it was during the fill phase.
These results were created by running Polygraph’s ReportGen scripts. Rather than ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.