I have never observed any kind of packet loss with our Linux guests. Are you using OSA or Hipersockets for client connections? Is there any IP conflict? __________________________________________ Ranga Nathan / CSG Systems Programmer - Specialist; Technical Services; BAX Global Inc. Irvine-California Tel: 714-442-7591 Fax: 714-442-2840
Thomas Denier <[EMAIL PROTECTED]> Sent by: Linux on 390 Port <[email protected]> 02/03/2005 08:32 AM Please respond to Linux on 390 Port <[email protected]> To [email protected] cc Subject Lost TCP/IP packets We have a Suse 8 Linux system running under VM. The system supports a TSM server. TSM is a networked backup system. Clients send copies of new and changed files over the network to the TSM server, and the TSM server stores the copies on tape, disk, or both. We are in the process of migrating TSM clients from an older TSM server running under z/OS to the new TSM server. One of the clients has so far taken about a day to backup a couple of hundred megabytes of data. Ping commands with 800 byte payloads show a packet loss rate of around one percent on traffic between the client and the Linux system, and a similar rate on traffic betwen the client and the z/OS system. As I understand IP congestion control, each lost packet will put the connection back into slow start mode. My rough calculations indicate that a one percent loss rate will limit throughput to something like a tenth of the nominal speed of the connection. However, we are seeing something like a thousandth of the nominal speed. Does z/OS Linux have unusually severe problems coping with lost packets? ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
