>-----Original Message----- >From: Linux on 390 Port [mailto:LINUX-390@VM.MARIST.EDU] On Behalf Of David Boyes >Sent: Thursday, August 30, 2012 3:47 PM >To: LINUX-390@VM.MARIST.EDU >Subject: Re: LGR guest quiesce > >> Just curious, could this functionality be used somehow to allow for a >> **consistent** disk snapshot using flashcopy for a live Linux guest? What I >> mean is that currently, we have to shutdown the guest, do the flashcopy and >> then restart the guest. Is there a way we can tell the Linux guest to freeze, >> take a snapshot of the disks and then resume? > >You can always log in and pause the guest, but that won't flush data in memory to disk where flashcopy can get at it. >You'd still have to do file-level backups inside the guest to get that.
Yes, you could do that but I am thinking, wouldn't it be nice if you could : 1-Stop running major applications/database servers, etc 2-issue a command on linux to flush buffers (sync) and put guest into frozen/sleep mode 3-Take your flashcopy outside the guest 4-issue another command on linux to resume To me, this plus a normal file level backup would be a great solution. Shutting down servers would always require someone to make sure everything including the server comes back up without problems. I would feel uncomfortable doing that unattended for critical servers. True, the same could happen when you go to restart the database or application but fewer things could go wrong as compared to a shutdown/restart. Also, a lot less resource intensive. Aria ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
