June 2001
Intermediate to advanced
320 pages
9h 18m
English
Content preview from Web Caching
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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.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.I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.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.
An Example
If you find yourself in the position of implementing Cache Digests, you can use the following two tables to verify your code. Table E-2 shows three sample URIs and their MD5 hash values. Table E-3 lists the same three URIs with the bit positions for four hash functions based on the MD5 column in Table E-2. This example uses a MASK_SIZE of 625,000 bytes, or 5,000,000 bits.
Table E-2. Cache Digest Example: URIs and Hash Values
| Method | URI | MD5 |
|---|---|---|
| GET | http://www.squid-cache.org | 69677C33244C8D776D1ED1210E07C120 |
| GET | http://www.oreilly.com | 4DC8FAFB9B5B0A4C08D992E453059333 |
| GET | ftp://ftp.ircache.net | F36FB917F5D687629A6E2BEB6BB569FF |
Table E-3. Cache Digest Example: URIs and Bit Positions
| Method | URI | B1 | B2 | B3 | B4 |
|---|---|---|---|---|---|
| GET | http://www.squid-cache.org | 3,389,683 | 3,996,727 | 736,161 | 389,216 |
| GET | http://www.oreilly.com | 17,083 | 1,434,892 | 3,476,644 | 2,874,291 |
| GET | ftp://ftp.ircache.net | 4,185,367 | 4,477,282 | 911,467 | 2,051,263 |
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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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.