-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Shariq,
On 7/17/13 12:12 PM, Shariq wrote: > Hi Christopher, > > > On Wed, Jul 17, 2013 at 9:32 PM, Christopher Schultz < > ch...@christopherschultz.net> wrote: > > Shariq, > > On 7/17/13 8:47 AM, Shariq wrote: >>>> On Wed, Jul 17, 2013 at 5:49 PM, André Warnier >>>> <a...@ice-sa.com> wrote: >>>> >>>>> Shariq wrote: >>>>> >>>>>> Hi, >>>>>> >>>>>> My requirement is to measure the request and response >>>>>> bandwidth of a webapp that's deployed in Tomcat. >>>>>> Basically capture each request and response bandwidth and >>>>>> store the statistics and do analytics on that data >>>>>> overtime. >>>>>> >>>>> >>>>> Bandwith >>>>> (http://en.wikipedia.org/wiki/**Bandwidth_%28computing%29< > http://en.wikipedia.org/wiki/Bandwidth_%28computing%29> >>>>> >>>>> > ) >>>>> refers to a number of bits/second transmitted over a >>>>> communications channel. >>>>> >>>>> This is typically something better captured by network >>>>> equipment (analysers, routers, switches), and it doesn't >>>>> really make much sense on an application base. >>>>> >>>>> Apart from that, the AccesLogValve can already tell you, on >>>>> a URL base, how much total time was needed to fulfill the >>>>> request, and how many bytes (x 8 bits) were sent as a >>>>> response. (You can probably also get the number of bytes of >>>>> the request). >>>>> >>>>> But Tomcat is not the only element which intervenes here, >>>>> and the real bandwidth can also be limited by what the >>>>> client (and everything in-between) can absorb. >>>>> >>>>> Maybe before we go any further into this, you would like to >>>>> make more clear what exactly you are trying to measure, and >>>>> for which purpose ? >>>>> >>>> >>>> What I am trying to measure is the size (number of bytes) of >>>> the request / response for a webapp. So overtime we can >>>> produce statistics such as, for a given time interval how >>>> much bytes was served by server / tomcat for a particular >>>> webapp. Also we are looking to throttle webapps consuming a >>>> high bandwidth etc. >>>> >>>> The idea is gather raw statistics and process / aggregate >>>> them overtime ... > > I think what you are looking for is a typical web server access > log. Just log the bytes read/written for each request, and use one > of the many fine (and freely-available) tools out on the Internet > to run statistics on your web server logs. > > >> Yes this is pretty much what I want to do, but I am still not >> able to find out how to get the bytes read/written in the valve. >> Any pointers on how I could find the bytes read/written for each >> request with a tomcat valve ?! http://tomcat.apache.org/tomcat-7.0-doc/config/valve.html#Access_Log_Valve Look at the "pattern" attribute details. I think you are looking for "%b". Note that %b excludes headers. If you want "bytes read", you can use %{Content-Length}i -- again, that will be side excluding headers. I don't believe Tomcat supports httpd-style %I and %O (which require a separate module to be enabled on the Tomcat side). I'm not sure how much work that would be to enable. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.17 (Darwin) Comment: GPGTools - http://gpgtools.org Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQIcBAEBCAAGBQJR5sP6AAoJEBzwKT+lPKRYv4EP/3+wAOMcMrS8CrgC4DjOmcU1 0WVu1qayJYVqyyTeG8V5sbfBvzOeoJOWL3VAxBBhHdGB5T/VlOO+WYno/6Lwy1JD vnY0PAhUVZ4O7ROgtbJPa6ft4e/mZnCnQkfESJw+i1hBq30iSgt3GkdQ59mD8K3i ygTmUujm7ObJsdO3Zdq81aqfZmWG0EfolChgDNBA12JkLqVjObBvUj9GtGGW3UVb V5cbHgeggkiGMEzY6WwwURo8HjuD0iJ8YJM/CBfZDwkCkgk6PFCtltuZfEnmIijy 5gbh9dBLoEJWFQUQ6bB80lF+qihljstu6vuNq5wtvTrqwKBVQS4Xw5rbaC9LoT29 YWHs69Y/rS8dy/aqVCpcKzZNApFmXNUmMnOAvuNt2ABf9CGPVi05NjnclxyuFjUR N+EHfSCigza2dFsr80cSi+H8AfB1tqtZueGBjLqXlVEG3HLS+zNNm8t0F8O1USA/ N79jSQRz5rs7DdkkNYvsgk/ltXcamhN3RplShXdlWqJrM571hZPPJ82vp/KFWsVV p4AAwWrCGyg6mzLlYY9tLFpzxuQ4QV+bAsHsIzd403lklp0KiqMzaK7/+oc3sry/ AwRCMiid5wifarXyj9LHV0oV2HJU7yiA4QA1UEqHL2AnD9BNzf5hDQyJHjFHrFak K/to3t+D5nyFVb9LWCa0 =PS2C -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
