Linux on 390 Port <[email protected]> wrote on 25.07.2006 11:23:02:
> Alan Altmark wrote: > > But, Carsten, the application may start up just fine, however it may be > > using old data. I have an application running on my workstation right now > > that saves its configuration data only when you shut it down (working as > > designed according to the vendor). Since the application is only > > terminated when the system is shut down, a live backup of the disk would > > have no effect. I mean, it would restore and run just fine, but be > > running with old data. > Well, backups are always about using old data in case of recovery as > far as I can see. Using an application that saves important data only > on shutdown in a mission critical environment is very dangerous > regardless of the backup soloution. > Well, I guess the question is whether you relaunch from a deterministic starting point, or whether your starting point is arbitrary. You are arguing along the line that one shouldn't be afraid about discretionary starting points, as anecdotal knowledge suggests that it will usually work anyhow. Alan is arguing that customers would typically not want to bet on arbitraryness and we shouldn't paper the risks doing so but clearly articulate it. Either you have application support/awareness for live backups, or the result by definition *is* arbitrary - unless you can guarantee a well defined transactional state (as viewed by an aplication) which we currently lack file system or more generally operating system support for. > > I can jump up and down and stamp my feet, claiming that the application is > > broken, but that doesn't make it so. I fully support Alan's view. > What application (Server Application on Linux) acts like you claim? > > regards, > Carsten > > ---------------------------------------------------------------------- > 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 Ingo -- Ingo Adlung, STSM, System z Linux and Virtualization Architecture mail: [EMAIL PROTECTED] - phone: +49-7031-16-4263 ---------------------------------------------------------------------- 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
