pureftpd - OPTIMIZING FOR HIGH LOAD

opensource 
If you are going to use Pure-FTPd on a highly loaded server, here are some
hints to get the best performances:

- Compile with:

env CFLAGS="-O2 -fomit-frame-pointer -fgcse -Os" ./configure --with-minimal --without-inetd --without-pam
make install-strip

- Run it in standalone mode. Don't use -C, don't enable pure-ftpwho nor
pure-uploadscript (-o), nor per-user limits (-y) .






- Increase your system max descriptors number and local port range. On a Linux kernel, you can try:

echo 2000 > /proc/sys/fs/super-max
echo 60000 > /proc/sys/fs/file-max
ulimit -n 60000
echo 30000 65534 > /proc/sys/net/ipv4/ip_local_port_range




- On a Linux kernel, disable syncookies, ecn, timestamps and window scaling:

echo 0 > /proc/sys/net/ipv4/tcp_syncookies
echo 0 > /proc/sys/net/ipv4/tcp_ecn
echo 0 > /proc/sys/net/ipv4/tcp_timestamps
echo 0 > /proc/sys/net/ipv4/tcp_window_scaling




- Disable access time update on your mounted filesystems. 
On a Linux system,just add 'noatime,nodiratime' for each mount point 
in your /etc/fstab file.







- Disable syslog output and DNS lookups. Run it with:

/usr/local/sbin/pure-ftpd -f none -H

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Latest update: 2010. 2. 20. 17:02

pureftpd - logging

opensource 


             --------------------- LOGGING ---------------------


Log messages are sent to the syslog daemon. You can disable logging with
'-f none'.
If you want all FTP messages to be redirected to a file, say /var/log/ftp,
add this line to your /etc/rsyslog.conf file:

ftp.*   /var/log/ftp

Then restart your syslogd daemon:

killall -HUP rsyslogd

You can also drop your old "syslogd" and "klogd" programs for Metalog, an
efficient alternative: http://metalog.sourceforge.net/

Names of uploaded/downloaded files are logged with paths like this:

                           /home/ftp//pub/bla.jpg
                           
The double-slash ('//') is the chroot limit.




















Set Log Rotation































 log]# cd /etc



 etc]# cd logrotate.d



 logrotate.d]# cat rsyslog







/var/log/messages /var/log/secure /var/log/maillog /var/log/spooler /var/log/boot.log /var/log/cron /var/log/xferlog {



    sharedscripts



    postrotate



        /bin/kill -HUP `cat /var/run/rsyslogd.pid 2> /dev/null` 2> /dev/null || true



    endscript



}





logrotate.d]#





















            



                    

  





  



  



  




                    


  
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						Latest update: 2010. 2. 20. 16:35
					







					

					
					
					

						
						
					

					
					

				

			
                    
                
                    
				
				

					
					

						
mod_throttle 3.1.2 - limit limit.

						programming

					

					
					
					

						            



            







       /* The limit value will normally, but not necessarily, be an



        * expression in kilo-bytes, mega-bytes, or giga-bytes. Even



        * when the limit doesn't refer to kilo-byte units, treat it



        * as such for the qualifiers. Ignore anything larger since



        * it will overflow unsigned long on 32-bit systems.



        */



       switch (ap_toupper(*limit)) {



       default:



               return "Invalid units for limit.";



       case 'G':



               config->limit *= 1024;



       case 'M':



               config->limit *= 1024;



       case 'K': case '\0':



               break;



       }





















it will overflow unsigned long on 32-bit systems.









range: 0 - 2^32-1













수년간 사용해온 소스에 버그가 있었다.


apache 1.3 에서 많이 사용되는 mod_throttle 소스에


중대한 버그가 있다.













            



                    

  





  



  



  




                    


  
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						Latest update: 2010. 2. 19. 13:53
					







					

					
					
					

						
						
					

					
					

				

			
                    
                
			
			
				
			
		

		

		
		
		

		
		
 

		
	

	














  
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