DOS Script To Cap Log Files

I have this common problem where my servers generates about 5-6 megs of log file every day filling up the disk, and following dos script to delete old logs have been quite handy

:: Iterate files alphabetically at specified folder and keep a maximum of N to 
:: avoid filling disk space. Called by run.bat
:: This script takes 3 arguments
@echo off

set FOLDER=%1
set LIMIT=%3

echo Accessing %FOLDER%

set /a COUNT=0
for /f "tokens=*" %%f in ('dir /b /a-d-h-s /o-n %FILEPREFIX%*') do (
	  set /a COUNT=COUNT+1
	  if !COUNT! GTR %LIMIT% (
	  		echo deleting %%f
	  		del /f /q %%f	

I place the script above in C:\filecleaner\deletefiles.bat. This script iterates a folder alphabetically and keep only specified amount of files. I then created a second script to be called by task scheduler

:: Called by task scheduler. This script calls deletefiles.bat over each file path prefix
:: Example:
:: deletefiles.bat c:\logrotate-test access.log 3 
:: means keep maximum 3 files (sorted alphabetically) starting with access.log
@echo off

deletefiles.bat "C:\apache-tomcat-6.0.35" catalina 7
deletefiles.bat "C:\apache-tomcat-6.0.35" commons-daemon 7
deletefiles.bat "C:\apache-tomcat-6.0.35" host-manager 7
deletefiles.bat "C:\apache-tomcat-6.0.35" localhost 7
deletefiles.bat "C:\apache-tomcat-6.0.35" manager 7
deletefiles.bat "C:\apache-tomcat-6.0.35" tomcat6-stderr 7
deletefiles.bat "C:\apache-tomcat-6.0.35" tomcat6-stdout 7

I put this script in C:\filecleaner\run.bat. As you can see it calls deletefiles.bat several times to clean my tomcat log files. The script uses following arguments:

  1. The folder where the log files exist
  2. The prefix of the log files
  3. How many latest files should be kept

It’s important to note this will only work if the files alphabetical ordering implies their age. This typically works best if the files pattern has a yyyy-MM-dd format (or similar at the end):


Finally to run this automatically every 3.30am in the morning I created a task scheduler with following action:



Benchmarking Web Page Load Time Using Apache AB Tool

Any apache httpd installation comes with ab tool on the bin folder. This handy tool can be used to perform benchmark testing:

ab -n 10 -c 2

The output you get is quite self-describing:

This is ApacheBench, Version 2.3 
Copyright 1996 Adam Twiss, Zeus Technology Ltd,
Licensed to The Apache Software Foundation,

Benchmarking (be patient).....done

Server Software:        Apache
Server Hostname:
Server Port:            80

Document Path:          /
Document Length:        29320 bytes

Concurrency Level:      2
Time taken for tests:   4.524 seconds
Complete requests:      10
Failed requests:        0
Write errors:           0
Total transferred:      297360 bytes
HTML transferred:       293200 bytes
Requests per second:    2.21 [#/sec] (mean)
Time per request:       904.890 [ms] (mean)
Time per request:       452.445 [ms] (mean, across all concurrent requests)
Transfer rate:          64.18 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    1   1.3      0       4
Processing:   806  887  90.4    852    1063
Waiting:      804  885  90.4    850    1061
Total:        806  887  91.3    852    1067

Percentage of the requests served within a certain time (ms)
  50%    852
  66%    888
  75%    918
  80%   1027
  90%   1067
  95%   1067
  98%   1067
  99%   1067
 100%   1067 (longest request)

Note that however I believe this tool will only request specified html page, not external resources associated with the page (no external images, javascript, css, etc.).

If you want to test https (SSL) page, make sure you have a version of Apache httpd with ssl support, and use abs instead.