memcached udp datagram size and noreply option support

Tomash Brechko tomash.brechko at
Sun May 4 07:09:26 UTC 2008

On Sun, May 04, 2008 at 01:50:26 +0100, Erik Ljungstrom wrote:
> The MTU is normally set on your network interfaces (and possibly  
> subsequent network devices depending on your setup) rather than in  
> individual applications. How you do it obviously depends on what OS  
> you're running. On Linux, *BSD and Solaris you'd typically do:  
> ifconfig [interface] mtu [value] where value is the maximum number of  
> bytes which can be sent in one go through that interface. So the  
> default 1500 means that packets will be fragmented if they exceed 1500  
> bytes.

Later I recalled that the MTU value is hardcoded into memcached
source.  This is because memcached has to output an UDP header, and
thus has to know how big the packet is.  I don't have the source at
hand now, grep something like '\b14[0-9][0-9]\b'.  I.e., you'll have
to change that value too...

   Tomash Brechko

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