>>> On Sat, Feb 2, 2008 at 6:19 AM, in message <[EMAIL PROTECTED]>, Mehdi <[EMAIL PROTECTED]> wrote: > Thanks for replies, so seems that the main reason behind using zLinux under > z/VM is to have shared resources (CPU, DASD,...) in better management. Will
Those are the technical reasons. The business reasons far outweigh the technical ones, and also point to running on z/VM. > you suggest z/VM if you have to install z/OS instead zLinux too or that is > another story? I might, regardless of what other people might say. I was an MVS-OS/390-z/OS systems programmer for over 20 years. I would have loved to run it on z/VM, even in production. It would have made my life a lot easier. > Main reason why I want to try zLinux on zSeries is to have some services > like mail/web/ftp... on the Z machine and see if Java applications have > better performance on zLinux than z/OS, any ideas? >From what has been talked about here, Java application performance has very >little to do with the operating system it is running on, and everything to do >with how good the application programmers are. Or, how good the application >profiling tools tell them to be. Typically, Java programmers are not at all >concerned with good programming, since they've been able to get away with >saying things like "add more RAM to the system," or "put in a faster CPU." >That doesn't work on the mainframe, so poorly written code stands out quite >visibly. Be prepared to have those profiling tools on hand to show them where >their problems are, or get blamed for the performance problems. Mark Post ---------------------------------------------------------------------- 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
