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<DIV><FONT color=#000080 size=2 face=Verdana>I knew why. i turn on error
log with level debug.
I have found that each request will first visit the cache
.</FONT></DIV>
<DIV><FONT color=#000080 size=2 face=Verdana></FONT> </DIV>
<DIV><FONT
color=#000080>I guess io is higher because each visit to read and write caching
. so i set proxy_buffering off and proxy_store off, then everything is
ok.</FONT></DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#000080></FONT> </DIV>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana>2009-12-16 </FONT></DIV><FONT
color=#000080 size=2 face=Verdana>
<HR style="WIDTH: 100px" align=left color=#b5c4df SIZE=1>
</FONT>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana><SPAN>Chancey</SPAN> </FONT></DIV>
<HR color=#b5c4df SIZE=1>
<DIV><FONT size=2 face=Verdana><STRONG>发件人：</STRONG> Chancey </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>发送时间：</STRONG> 2009-12-16 16:55:14
</FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>收件人：</STRONG> nginx@sysoev.ru
</FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>抄送：</STRONG> </FONT></DIV>
<DIV><FONT size=2 face=Verdana><STRONG>主题：</STRONG> load balance -- Write IO is
too high </FONT></DIV>
<DIV><FONT size=2 face=Verdana></FONT> </DIV>
<DIV><FONT size=2 face=Verdana>
<DIV><FONT size=2 face=Verdana>Hi guys:</FONT></DIV>
<DIV> </DIV>
<DIV style="TEXT-INDENT: 2em">i have two servers, and 1 server as proxy
server and upstream 1 server and 2 server.</DIV>
<DIV style="TEXT-INDENT: 2em"> </DIV>
<DIV style="TEXT-INDENT: 2em">I set up 1 server's
weight is 1, and 2 server's weight is 5 .</DIV>
<DIV style="TEXT-INDENT: 2em"> </DIV>
<DIV
style="TEXT-INDENT: 2em">Now they can work properly ,
but 1 server's write IO is too hight .</DIV>
<DIV
style="TEXT-INDENT: 2em">Applications is no write operation
, Why such a high level of write IO ?</DIV>
<DIV style="TEXT-INDENT: 2em"> </DIV>
<DIV style="TEXT-INDENT: 2em">Thanks very mach.
Sorry for my bad english </DIV>
<DIV style="TEXT-INDENT: 2em"> </DIV>
<DIV style="TEXT-INDENT: 2em"><FONT size=2 face=Verdana></FONT> </DIV>
<DIV align=left><FONT color=#c0c0c0 size=2 face=Verdana>2009-12-16
</FONT></DIV><FONT size=2 face=Verdana>
<HR style="WIDTH: 122px; HEIGHT: 2px" align=left SIZE=2>
<DIV><FONT color=#c0c0c0 size=2 face=Verdana><SPAN>Chancey</SPAN>
</FONT></DIV></FONT></FONT></DIV></BODY></HTML>