00000006.htm

一份很好的linux入门资料

Gaudet)&nbsp;&nbsp;<BR>
&nbsp;<BR>
In&nbsp;March&nbsp;1999,&nbsp;Microsoft&nbsp;sponsored&nbsp;a&nbsp;benchmark&nbsp;comparing&nbsp;NT&nbsp;to&nbsp;Linux&nbsp;&nbsp;<BR>
at&nbsp;serving&nbsp;large&nbsp;numbers&nbsp;of&nbsp;http&nbsp;and&nbsp;smb&nbsp;clients,&nbsp;in&nbsp;<BR>
which&nbsp;they&nbsp;failed&nbsp;to&nbsp;see&nbsp;good&nbsp;results&nbsp;from&nbsp;Linux.&nbsp;See&nbsp;also&nbsp;my&nbsp;article&nbsp;on&nbsp;<BR>
&nbsp;Mindcraft's&nbsp;April&nbsp;1999&nbsp;Benchmarks&nbsp;for&nbsp;more&nbsp;info.&nbsp;&nbsp;<BR>
&nbsp;<BR>
See&nbsp;also&nbsp;The&nbsp;Linux&nbsp;Scalability&nbsp;Project.&nbsp;They're&nbsp;doing&nbsp;interesting&nbsp;work,&nbsp;<BR>
&nbsp;including&nbsp;Niels&nbsp;Provos'&nbsp;hinting&nbsp;poll&nbsp;patch.&nbsp;&nbsp;<BR>
&nbsp;<BR>
See&nbsp;also&nbsp;Mike&nbsp;Jagdis'&nbsp;work&nbsp;on&nbsp;improving&nbsp;select()&nbsp;and&nbsp;poll();&nbsp;here's&nbsp;&nbsp;<BR>
Mike's&nbsp;post&nbsp;about&nbsp;it.&nbsp;&nbsp;<BR>
&nbsp;<BR>
Solaris&nbsp;7&nbsp;supposedly&nbsp;supports&nbsp;an&nbsp;even&nbsp;more&nbsp;efficient&nbsp;poll()&nbsp;scheme&nbsp;which&nbsp;<BR>
&nbsp;involves&nbsp;/dev/poll;&nbsp;apparantly,&nbsp;if&nbsp;you&nbsp;like,&nbsp;you&nbsp;can&nbsp;avoid&nbsp;<BR>
having&nbsp;to&nbsp;tell&nbsp;the&nbsp;OS&nbsp;constantly&nbsp;what&nbsp;files&nbsp;you're&nbsp;interested&nbsp;in,&nbsp;&nbsp;<BR>
which&nbsp;should&nbsp;help&nbsp;throughput.&nbsp;&nbsp;<BR>
&nbsp;<BR>
Mohit&nbsp;Aron&nbsp;(<A HREF="mailto:[e-mail])">[e-mail])</A>&nbsp;writes&nbsp;that&nbsp;rate-based&nbsp;clocking&nbsp;in&nbsp;TCP&nbsp;can&nbsp;<BR>
&nbsp;improve&nbsp;HTTP&nbsp;response&nbsp;time&nbsp;over&nbsp;'slow'&nbsp;connections&nbsp;<BR>
by&nbsp;80%.&nbsp;&nbsp;<BR>
&nbsp;<BR>
Measuring&nbsp;Server&nbsp;Performance&nbsp;<BR>
&nbsp;<BR>
Two&nbsp;tests&nbsp;in&nbsp;particular&nbsp;are&nbsp;simple,&nbsp;interesting,&nbsp;and&nbsp;hard:&nbsp;&nbsp;<BR>
&nbsp;<BR>
&nbsp;&nbsp;&nbsp;1.raw&nbsp;connections&nbsp;per&nbsp;second&nbsp;(how&nbsp;many&nbsp;512&nbsp;byte&nbsp;files&nbsp;per&nbsp;second&nbsp;&nbsp;<BR>
can&nbsp;you&nbsp;serve?)&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;2.total&nbsp;transfer&nbsp;rate&nbsp;on&nbsp;large&nbsp;files&nbsp;with&nbsp;many&nbsp;slow&nbsp;clients&nbsp;(how&nbsp;many&nbsp;<BR>
&nbsp;28.8k&nbsp;modem&nbsp;clients&nbsp;can&nbsp;simultaneously&nbsp;download&nbsp;from&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;your&nbsp;server&nbsp;before&nbsp;performance&nbsp;goes&nbsp;to&nbsp;pot?)&nbsp;&nbsp;<BR>
&nbsp;<BR>
Jef&nbsp;Poskanzer&nbsp;has&nbsp;published&nbsp;benchmarks&nbsp;comparing&nbsp;many&nbsp;web&nbsp;servers.&nbsp;See&nbsp;<BR>
<A HREF="http://www.acme.com/software/thttpd/benchmarks.html">http://www.acme.com/software/thttpd/benchmarks.html</A>&nbsp;for&nbsp;his&nbsp;results.&nbsp;&nbsp;<BR>
&nbsp;<BR>
I&nbsp;also&nbsp;have&nbsp;a&nbsp;few&nbsp;old&nbsp;notes&nbsp;about&nbsp;comparing&nbsp;thttpd&nbsp;to&nbsp;Apache&nbsp;that&nbsp;may&nbsp;be&nbsp;<BR>
&nbsp;of&nbsp;interest&nbsp;to&nbsp;beginners.&nbsp;&nbsp;<BR>
&nbsp;<BR>
Chuck&nbsp;Lever&nbsp;keeps&nbsp;reminding&nbsp;us&nbsp;about&nbsp;Banga&nbsp;and&nbsp;Druschel's&nbsp;paper&nbsp;on&nbsp;web&nbsp;&nbsp;<BR>
server&nbsp;benchmarking.&nbsp;It's&nbsp;worth&nbsp;a&nbsp;read.&nbsp;&nbsp;<BR>
&nbsp;<BR>
Interesting&nbsp;sigio/siginfo-based&nbsp;servers&nbsp;<BR>
&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Zach&nbsp;Brown's&nbsp;phhttpd&nbsp;-&nbsp;&quot;a&nbsp;quick&nbsp;web&nbsp;server&nbsp;that&nbsp;was&nbsp;written&nbsp;to&nbsp;&nbsp;<BR>
showcase&nbsp;the&nbsp;sigio/siginfo&nbsp;event&nbsp;model.&nbsp;consider&nbsp;this&nbsp;code&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;highly&nbsp;experimental&nbsp;and&nbsp;yourself&nbsp;highly&nbsp;mental&nbsp;if&nbsp;you&nbsp;try&nbsp;and&nbsp;use&nbsp;&nbsp;<BR>
it&nbsp;in&nbsp;a&nbsp;production&nbsp;environment.&quot;&nbsp;Uses&nbsp;the&nbsp;siginfo&nbsp;features&nbsp;of&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2.3.21&nbsp;or&nbsp;later,&nbsp;and&nbsp;includes&nbsp;the&nbsp;needed&nbsp;patches&nbsp;for&nbsp;earlier&nbsp;&nbsp;<BR>
kernels.&nbsp;Rumored&nbsp;to&nbsp;be&nbsp;even&nbsp;faster&nbsp;than&nbsp;khttpd.&nbsp;See&nbsp;his&nbsp;post&nbsp;of&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;31&nbsp;May&nbsp;1999&nbsp;for&nbsp;some&nbsp;notes.&nbsp;&nbsp;<BR>
&nbsp;<BR>
Interesting&nbsp;select()-based&nbsp;servers&nbsp;<BR>
&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;thttpd&nbsp;Very&nbsp;simple.&nbsp;Uses&nbsp;a&nbsp;single&nbsp;process.&nbsp;It&nbsp;has&nbsp;good&nbsp;performance,&nbsp;<BR>
&nbsp;but&nbsp;doesn't&nbsp;scale&nbsp;with&nbsp;the&nbsp;number&nbsp;of&nbsp;CPU's.&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;mathopd.&nbsp;Similar&nbsp;to&nbsp;thttpd.&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;fhttpd&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;boa&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Roxen&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Zeus,&nbsp;a&nbsp;commercial&nbsp;server&nbsp;that&nbsp;tries&nbsp;to&nbsp;be&nbsp;the&nbsp;absolute&nbsp;fastest.&nbsp;&nbsp;<BR>
See&nbsp;their&nbsp;tuning&nbsp;guide.&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The&nbsp;other&nbsp;non-Java&nbsp;servers&nbsp;listed&nbsp;at&nbsp;<A HREF="http://www.acme.">http://www.acme.</A>&nbsp;<BR>
com/software/thttpd/benchmarks.html&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;BetaFTPd&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Flash-Lite&nbsp;-&nbsp;web&nbsp;server&nbsp;using&nbsp;IO-Lite.&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Flash:&nbsp;An&nbsp;efficient&nbsp;and&nbsp;portable&nbsp;Web&nbsp;server&nbsp;--&nbsp;uses&nbsp;select(),&nbsp;&nbsp;<BR>
mmap(),&nbsp;mincore()&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;xitami&nbsp;-&nbsp;uses&nbsp;select()&nbsp;to&nbsp;implement&nbsp;its&nbsp;own&nbsp;thread&nbsp;abstraction&nbsp;&nbsp;<BR>
for&nbsp;portability&nbsp;to&nbsp;systems&nbsp;without&nbsp;threads.&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Medusa&nbsp;-&nbsp;a&nbsp;server-writing&nbsp;toolkit&nbsp;in&nbsp;Python&nbsp;that&nbsp;tries&nbsp;to&nbsp;deliver&nbsp;&nbsp;<BR>
very&nbsp;high&nbsp;performance.&nbsp;&nbsp;<BR>
&nbsp;<BR>
Interesting&nbsp;thread-based&nbsp;servers&nbsp;<BR>
&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Hoser&nbsp;FTPD.&nbsp;See&nbsp;their&nbsp;benchmark&nbsp;page.&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Peter&nbsp;Eriksson's&nbsp;phttpd&nbsp;and&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;pftpd&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;The&nbsp;Java-based&nbsp;servers&nbsp;listed&nbsp;at&nbsp;<A HREF="http://www.acme.">http://www.acme.</A>&nbsp;<BR>
com/software/thttpd/benchmarks.html&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Sun's&nbsp;Java&nbsp;Web&nbsp;Server&nbsp;(which&nbsp;has&nbsp;been&nbsp;reported&nbsp;to&nbsp;handle&nbsp;500&nbsp;&nbsp;<BR>
simultaneous&nbsp;clients)&nbsp;&nbsp;<BR>
&nbsp;<BR>
Interesting&nbsp;in-kernel&nbsp;servers&nbsp;<BR>
&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;khttpd&nbsp;&nbsp;<BR>
&nbsp;<BR>
Other&nbsp;interesting&nbsp;links&nbsp;<BR>
&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Novell's&nbsp;FastCache&nbsp;--&nbsp;claims&nbsp;10000&nbsp;hits&nbsp;per&nbsp;second.&nbsp;Quite&nbsp;the&nbsp;&nbsp;<BR>
pretty&nbsp;performance&nbsp;graph.&nbsp;&nbsp;<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Rik&nbsp;van&nbsp;Riel's&nbsp;Linux&nbsp;Performance&nbsp;Tuning&nbsp;site&nbsp;&nbsp;<BR>
&nbsp;<BR>
&nbsp;<BR>
Copyright&nbsp;1999&nbsp;Dan&nbsp;Kegel&nbsp;<BR>
<A HREF="mailto:[e-mail]">[e-mail]</A>&nbsp;<BR>
Last&nbsp;updated:&nbsp;24&nbsp;October&nbsp;1999&nbsp;<BR>
[Return&nbsp;to&nbsp;www.kegel.com]&nbsp;&nbsp;<BR>
&nbsp;<BR>
--&nbsp;<BR>
Windows:&nbsp;32&nbsp;bit&nbsp;extensions&nbsp;and&nbsp;a&nbsp;graphical&nbsp;shell&nbsp;for&nbsp;a&nbsp;16&nbsp;bit&nbsp;patch&nbsp;to&nbsp;<BR>
an&nbsp;8&nbsp;bit&nbsp;operating&nbsp;system&nbsp;originally&nbsp;coded&nbsp;for&nbsp;a&nbsp;4&nbsp;bit&nbsp;microprocessor,&nbsp;<BR>
written&nbsp;by&nbsp;a&nbsp;2&nbsp;bit&nbsp;company,&nbsp;that&nbsp;can't&nbsp;stand&nbsp;1&nbsp;bit&nbsp;of&nbsp;competition.&nbsp;<BR>
&nbsp;<BR>
Welcome&nbsp;to&nbsp;DNA&nbsp;Studio:&nbsp;<A HREF="http://dnastudio.dhs.org">http://dnastudio.dhs.org</A>&nbsp;<BR>
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※&nbsp;来源:·BBS&nbsp;水木清华站&nbsp;bbs.net.tsinghua.edu.cn·[FROM:&nbsp;202.112.85.250]&nbsp;<BR>


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