[CWB] Upgrade of CQPweb server

[Stephanie Evert]

Hi Stefan,

I can answer some of these points:

> We want to upgrade from Ubuntu 22.04 LTS to 24.04 LTS. Has anyone faced issues with that upgrade? I vaguely remember that an earlier Ubuntu upgrade caused some problems due to changing defaults.

Our CQPweb server runs on Ubuntu 24.04.3. As far as I can remember, we didn't have any major issues during the OS upgrade. However, …

> We were also thinking about an update of CQPweb (revision 1826, 3.3.17). However, I am somewhat uncertain about the version policy of CQPweb. The website (https://cwb.sourceforge.io/cqpweb.php#install) mentions 3.3.15 as the latest version. Where, in terms of stability, does revision 1826 stand? Is there a more recent revision that provides the same level of stability?
> 
> I checked the administrator's manual and could not find any necessary migration steps for 3.3.17 or later. Does that mean that I can simply compare r1826 with the latest SVN revision and merge any changes into the installed .php files?


… we're still on CQPweb v3.2.44 because 3.3 is still considered unstable / incomplete and we didn't have the courage to upgrade. Did you upgrade your server from 3.2 to 3.3 at some point? And if so, did you have major issues due to the upgrade?

> As far as I can see, only Perl will be affected by a major version change. The MySQL version seems to remain the same. I guess that means I'll have to reinstall cwb and cwb-perl from SVN. Our current system (cwb, cwb-perl, CQPweb) is based on revision 1826.

You could also simply install CWB from the .deb-package and cwb-perl from CPAN. Though it's always best to use the latest and least buggy versions from SVN, of course.

> While going through the current .php files, I found files named like the following examples:
> usr/31/index.php
> usr/4a/index.php
> ...
> 
> Do they serve a purpose? They all contain the same line of code:
> <?php exit(1);

Yes, these are weird. We've got two such subdirectories on our CQPweb server (with different numbers), created 5 years apart. 

Best,
Stephanie