On Fri, May 8, 2015 at 8:04 PM, Dennis Ullrich <[email protected]> wrote: > Dear all, > > I want to make a proposal which is similar to online kernel patching without > reboot... The idea is to do something which could work similar to the live > kernel patching method. I don't know how difficult it would be, to implement > my proposal, but here it comes. > > For example I have a HDD with one partiton and a Oracle DB on the ext4 > filesystem. I want to migrate it live to another storage (for example a LPFC > LUN via Multipath) with all processes etc. on the FS. > My idea is to modify the IOStack that it is able to make a "bitwise" copy > and "simply" move the Filesystem to its new place on a blockdevice. > The point is, to have control about the copy-progress and tell the IOStack > which device is to use for the requested data, on every access. When the > copy is done, the admin should be able to remove the old drive. All > processes should be on the new blockdevice after the movement. > > What do you think about this idea?
Why can't you stop the application for a jiffy? Live patching and stuff is nice but if your service can't deal with a short outage of a single application it is simple broken by design. -- Thanks, //richard -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
