Windows2003主机IIS开启gzip之后，百度蜘蛛会返回200 0 64
照成的结果是百度只爬行不收录，原因最后一位64返回的结果说明了百度获取不了内容或者发现内容不存在更新情况。

#Software: Microsoft Internet Information Services 6.0
#Version: 1.0
#Date: 2012-10-06 00:08:11
#Fields: date time s-sitename s-ip cs-method cs-uri-stem cs-uri-query s-port cs-username c-ip cs(User-Agent) sc-status sc-substatus sc-win32-status
2012-10-06 00:08:11 W3SVC1036428931 59.188.239.30 HEAD /index.asp - 80 - 69.5.239.82 Mozilla/5.0+(compatible;+MSIE+9.0;+Windows+NT+6.1;+Win64;+x64;+Trident/5.0) 200 0 0
2012-10-06 00:16:28 W3SVC1036428931 59.188.239.30 GET /about.asp 137z_84831 80 - 220.181.108.153 Mozilla/5.0+(compatible;+Baiduspider/2.0;++http://www.baidu.com/search/spider.html) 200 0 64

而长期200 0 64的话会导致网站被K，然而自己那台服务器流量基本上满了，必须要优化了。此时，C:\WINDOWS\system32\inetsrv\MetaBase.xml关于gzip的压缩是这样设置的：

  HcCompressionDll="%windir%\system32\inetsrv\gzip.dll"
  HcCreateFlags="0"
  HcDoDynamicCompression="FALSE"
  HcDoOnDemandCompression="FALSE"
  HcDoStaticCompression="FALSE"
  HcDynamicCompressionLevel="9"
  HcFileExtensions="htm
   js
   css
   txt
   xml"
  HcOnDemandCompLevel="9"
  HcPriority="1"
  HcScriptFileExtensions="asp
   html"   --注：本站采用伪静态，因此把html写到动态压缩里了
 >

  HcCompressionDll="%windir%\system32\inetsrv\gzip.dll"
  HcCreateFlags="1"
  HcDoDynamicCompression="TRUE"
  HcDoOnDemandCompression="TRUE"
  HcDoStaticCompression="TRUE" 
  HcDynamicCompressionLevel="9"
  HcFileExtensions="htm
   js
   css
   xml
   txt"
  HcOnDemandCompLevel="9"
  HcPriority="1"
  HcScriptFileExtensions="asp
   html"  --注：本站采用伪静态，因此把html写到动态压缩里了
 >

  HcCacheControlHeader="max-age=86400"
  HcCompressionBufferSize="8192"
  HcCompressionDirectory="%windir%\IIS Temporary Compressed Files"
  HcDoDiskSpaceLimiting="FALSE"
  HcDoDynamicCompression="TRUE"
  HcDoOnDemandCompression="TRUE"
  HcDoStaticCompression="TRUE"
  HcExpiresHeader="Wed, 01 Jan 1997 12:00:00 GMT"
  HcFilesDeletedPerDiskFree="256"
  HcIoBufferSize="8192"
  HcMaxDiskSpaceUsage="100000000"
  HcMaxQueueLength="1000"
  HcMinFileSizeForComp="1"
  HcNoCompressionForHttp10="TRUE"
  HcNoCompressionForProxies="TRUE"
  HcNoCompressionForRange="FALSE"
  HcSendCacheHeaders="FALSE"
 >

面对日益缺少的服务器资源，必须要保护资源合理利用，一定得开启IIS gizp功能的话请参考 http://seo.chinaz.com/?host=www.youku.com，细心的人会发现Content-Encoding: deflate，即优酷是采用deflate压缩方式。

经过仔细研究之后，终于找到了更正IIS gizp配置以便百度能正常收录网站的解决方法

  HcCompressionDll="%windir%\system32\inetsrv\gzip.dll"
  HcCreateFlags="0"
  HcDoDynamicCompression="TRUE"
  HcDoOnDemandCompression="TRUE"
  HcDoStaticCompression="TRUE" --把压缩方式换成了deflate方式
  HcDynamicCompressionLevel="9"
  HcFileExtensions="htm
   js
   css
   txt
   xml"
  HcOnDemandCompLevel="9"
  HcPriority="1"
  HcScriptFileExtensions="asp
   html"
 >

  HcCompressionDll="%windir%\system32\inetsrv\gzip.dll"
  HcCreateFlags="1"
  HcDoDynamicCompression="FALSE"
  HcDoOnDemandCompression="FALSE"
  HcDoStaticCompression="FALSE"  --把压缩方式换成了deflate方式
  HcDynamicCompressionLevel="9"
  HcFileExtensions="htm
   js
   css
   xml
   txt"
  HcOnDemandCompLevel="9"
  HcPriority="1"
  HcScriptFileExtensions="asp
   html"
 >

  HcCacheControlHeader="max-age=86400"
  HcCompressionBufferSize="8192"
  HcCompressionDirectory="%windir%\IIS Temporary Compressed Files"
  HcDoDiskSpaceLimiting="FALSE"
  HcDoDynamicCompression="TRUE"
  HcDoOnDemandCompression="TRUE"
  HcDoStaticCompression="TRUE"
  HcExpiresHeader="Wed, 01 Jan 1997 12:00:00 GMT"
  HcFilesDeletedPerDiskFree="256"
  HcIoBufferSize="8192"
  HcMaxDiskSpaceUsage="100000000"
  HcMaxQueueLength="1000"
  HcMinFileSizeForComp="1"
  HcNoCompressionForHttp10="FALSE"   --这里将默认的TRUE改为FALSE
  HcNoCompressionForProxies="TRUE"
  HcNoCompressionForRange="FALSE"
  HcSendCacheHeaders="FALSE"
 >

重启IIS，继续观察IIS 日志