On Thu, Jun 07, 2007 at 12:37:57PM +0200, Jakob Praher wrote:
> i successfully copied data to the coda mount point and saw it getting 
> replicated on both vicepas.
> 
> now before using it for something productively i thought about testing a 
> failure sceanrio. so i stopped the replication server. indeed i could 
> use the mount file.
> 
> so i tried to copy data onto the mounted coda partition. IMHO i thought 
> that it gets copied to the online server and later replicated to the 
> server when it is online again. but nothing happened. the client stuck 
> with the cp command and the vicepa of the online server did not change 
> at all (using df-h).

A client doesn't immediately give up on a server that has disappeared,
it should take about 60 seconds to time out, but because of a missing
division in librpc2 it actually takes closer to 90 seconds at the moment.

If you run 'codacon' in a separate terminal window you can see events
like server disconnections and reconnections.

> so i canceld the command and tried to put the second server online 
> again. that worked. but after refreshing the client services I got the 
> following log messages:

Refreshing the client? This log looks more like you shut down and
restarted the client.

> 12:28:23 starting VDB scan
> 12:28:23 Fatal Signal (11); pid 3301 becoming a zombie...
> 12:28:23 You may use gdb to attach to 3301
> 

This is a segfault very early on, we haven't even started looking at
the cached files. I don't understand how this is related, a segfault in
this place is definitely unexpected. How did you restart the client,
init script, vutil -shutdown, or a kill -9?

What distribution and c-compiler are you using, this looks like it
happens the first time we iterate a c++ list structure after a restart
which could indicate that the offsetoff macro may be faulty, but then I
would have expected that that would have also affected venus while it
was running. Is your machine 32-bit or 64-bit?

> As a second thing: in my scenario i do not really need acls, since i am 
> only interested in using coda for shared data and i am having firewalls 
>  such that only privileged hosts can access the file servers. can i 
> somehow configure the volumes such that everbody can access them without 
> the need to do clog? are there some good pointers i can rtfm for this case.

There is at the moment no way to avoid clog if you want write access
because the servers only accept updates over authenticated connections.

Jan