[logs] High Network Load

From: Philip Webster (pjwebsterat_private)
Date: Thu Sep 18 2003 - 16:59:05 PDT

  • Next message: Paul Robertson: "Re: [logs] High Network Load"

    Hello,
    
    I'm implementing a central log server over a large class B network, and 
    have chosen syslog-ng as the server.  One of syslog-ng's features is 
    that it can report the number of messages dropped internally, usually 
    through either the receive or write buffers not being large enough. 
    These values can be tweaked, and at least you know when there is 
    something going wrong.
    
    But what if the OS kernel drops the message?  Does anyone here have any 
    experience with the OS losing messages before they get to the syslogd 
    process?  How can this be monitored and overcome?
    
    The server (Red Hat Advanced Server) will be accepting logs over both 
    UDP and TCP (and possibly via SSH port forwarding and/or stunnel), 
    sitting on a 100Mb connection, and may potentially have hundreds of 
    machines logging to it, as well as routers, switches, and several very 
    high volume proxy servers.
    
    Any thoughts?
    
    Thanks
    Phil
    
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