On Jan 25, 2013, at 9:20 PM, Sam Varshavchik <mr...@courier-mta.com> wrote:
> William Brown writes: > >> In the future, hopefully once btrfs is a bit more mature, perhaps it >> could be considered to make a new writable snapshot subvolume of the >> system, and the use yum prefix to update the new subvolume. When you >> reboot, the new subvolume can become the new root. >> >> a) Currently running system files aren't affected. >> b) All upgrades are done online >> c) the update would merely be a switching of the root device on next >> reboot >> d) you could even roll-back by remounting the old root subvolume as the >> root fs. > > Now, what's not clear to me – what exactly happens if, say, at the same time > I'm browsing the web at the same time, watching videos. That generates write > activity, changes to the disk, so what happens to all other disk activity > while the upgrade takes place. Disk contention, and things may be sluggish. Chances are your videos won't stutter, but I guess that depends on the video bit rate, effectiveness of disk and file system read ahead, and application buffering all are. Chris Murphy -- devel mailing list devel@lists.fedoraproject.org https://admin.fedoraproject.org/mailman/listinfo/devel
