On Wed, Jun 18, 2008 at 2:51 AM, Scott Rohling <[EMAIL PROTECTED]> wrote:
> - Use PIPEDDR to write to a file and FTP this file to your Linux server I'm tempted to think that using temporary files to hold a copy of the raw tracks is a royal PITA (though if you squish or even compress the tracks, it probably will fit on a big CMS minidisk). I do think there used to be a FTP pipeline stage floating around, but I'm not sure it did both PUT and GET. Writing your own FTP client stage might be a nice learning experience (I've asked Endicott about a "raw" mode for the FTP client, but no luck). If you read from disk while during the transfer, you certainly will need to have the system shutdown to get a consistent copy on the other side (because you take much longer between the first and last track of the volume). Even when you could flashcopy the volume to make it consistent during transfer, you still would have a lot of time between volumes and you would need to know your applications very well to trust this scheme. Too bad you don't have a VM system running permanently on the D/R side. I once wrote a client / server that used the trackread and trackwrite stage to do incremental track-by-track mirror of a disk (to keep a copy of our RACF database and avoid copying the full thing all the time). When we saw the first new z/VM installations with Linux show up, I proposed a new feature for the Linux disk driver that would allow arbitrary tracks to be read and written (like the pipeline stages). That way a Linux guest could be used to backup the VM packs along with the Linux data. And for D/R restore you could first IPL one Linux guest native, restore the VM packs (from TSM) and then IPL VM again. Something like that would fit your needs. The design of the driver appeared to be very simple after a few beers, but next morning it turned out to be harder. Rob ---------------------------------------------------------------------- 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
