Re: aufs based upgrade tests

2009-03-21 Thread John McCabe-Dansted
On Sat, Mar 21, 2009 at 2:28 AM, Alan Pope a...@popey.com wrote: That would fail for users who make one-time changes to their data. For example users who download their mail via pop. If they upgrade using aufs and then proceed to test the new features of their mail client, it might be

Re: aufs based upgrade tests

2009-03-20 Thread Lars Wirzenius
to, 2009-03-19 kello 16:20 +0100, Martin Soto kirjoitti: Seconded, you start your session once with the new version installed, and there's often no way back. Applications will surely update their configuration data as soon as they're started, and there's no guarantee that they'll work when the

Re: aufs based upgrade tests

2009-03-20 Thread Oliver Grawert
hi, Am Freitag, den 20.03.2009, 09:49 +0200 schrieb Lars Wirzenius: to, 2009-03-19 kello 16:20 +0100, Martin Soto kirjoitti: Seconded, you start your session once with the new version installed, and there's often no way back. Applications will surely update their configuration data as soon

Re: aufs based upgrade tests

2009-03-20 Thread Alexander Sack
On Wed, Mar 18, 2009 at 09:18:50AM +0100, Michael Vogt wrote: On Tue, Mar 17, 2009 at 03:53:23PM +0200, Marius Gedminas wrote: On Mon, Mar 16, 2009 at 07:00:12PM +0100, Michael Vogt wrote: Yes, after the upgrade the system will be jaunty until the next reboot, then the writable overlay is

Re: aufs based upgrade tests

2009-03-20 Thread Alan Pope
2009/3/18 Alexander Sack a...@ubuntu.com: Is there any reason why we don't overlay /home? Just so that you can test upgrade for existing configs? That would fail for users who make one-time changes to their data. For example users who download their mail via pop. If they upgrade using aufs and

Re: aufs based upgrade tests

2009-03-19 Thread Vincenzo Ciancia
On 18/03/2009 Michael Vogt wrote: This is pretty rare, but it does sometimes happens. How can this be rare if the user is supposed to test things after the upgrade? I didn't think about it but it's actually risky - every application can potentially be non-forward-compatible. Users should be

Re: aufs based upgrade tests

2009-03-19 Thread Martin Soto
On Thu, 2009-03-19 at 15:56 +0100, Vincenzo Ciancia wrote: ... How can this be rare if the user is supposed to test things after the upgrade? I didn't think about it but it's actually risky - every application can potentially be non-forward-compatible. Users should be adviced to use the

Re: aufs based upgrade tests

2009-03-18 Thread Michael Vogt
On Tue, Mar 17, 2009 at 03:53:23PM +0200, Marius Gedminas wrote: On Mon, Mar 16, 2009 at 07:00:12PM +0100, Michael Vogt wrote: Yes, after the upgrade the system will be jaunty until the next reboot, then the writable overlay is removed and the system is exactly in the same state as before

Re: aufs based upgrade tests

2009-03-17 Thread Marius Gedminas
On Mon, Mar 16, 2009 at 07:00:12PM +0100, Michael Vogt wrote: Yes, after the upgrade the system will be jaunty until the next reboot, then the writable overlay is removed and the system is exactly in the same state as before the upgrade. Does this overlay cover the whole filesystem? If people

Re: aufs based upgrade tests

2009-03-16 Thread Michael Vogt
On Sat, Mar 14, 2009 at 02:13:24PM +, (``-_-´´) -- BUGabundo wrote: Olá Michael e a todos. On Friday 13 March 2009 18:19:28 Michael Vogt wrote: during the last UDS we talked informally about using the aufs overlay filesystem layer for release upgrade testing. I build a prototype

Re: aufs based upgrade tests

2009-03-16 Thread Michael Vogt
On Sun, Mar 15, 2009 at 02:27:16AM -0400, John Vivirito wrote: On 03/14/2009 10:13 AM, (``-_-´´) -- BUGabundo wrote: Olá Michael e a todos. [..] This idea seems like a really nice idea, and one that in some other form is requested by users/testers. I would like to add to points: * if

Re: aufs based upgrade tests

2009-03-16 Thread Michael Vogt
On Sun, Mar 15, 2009 at 11:51:52AM +0100, Vincenzo Ciancia wrote: When doing something like this one should be careful because here you have a copy of all files that are modified during the upgrade. Applications keeping these files open will write to the old copies, and applications which

Re: aufs based upgrade tests

2009-03-15 Thread John Vivirito
On 03/14/2009 10:13 AM, (``-_-´´) -- BUGabundo wrote: Olá Michael e a todos. On Friday 13 March 2009 18:19:28 Michael Vogt wrote: during the last UDS we talked informally about using the aufs overlay filesystem layer for release upgrade testing. I build a prototype implementation of this

Re: aufs based upgrade tests

2009-03-15 Thread Vincenzo Ciancia
When doing something like this one should be careful because here you have a copy of all files that are modified during the upgrade. Applications keeping these files open will write to the old copies, and applications which reopen the file after the upgrade will not see this data. This may be

Re: aufs based upgrade tests

2009-03-14 Thread (``-_-´´) -- BUGabundo
Olá Michael e a todos. On Friday 13 March 2009 18:19:28 Michael Vogt wrote: during the last UDS we talked informally about using the aufs overlay filesystem layer for release upgrade testing. I build a prototype implementation of this now that should be ok for public testing. The idea