[daip] AIPS does not load on networked machines

[Eric Greisen]

Matthew John Merlo wrote:
> Hello
> 
> I am attempting to host AIPS off a Linux machine to five of Linux
> machines.  I have already specified the other machines as host and set up
> data areas for them.  The AIPS root directory, /usr/AIPS, is hosted via a
> NFS network to the other machines.  When I try to run aips on any of the
> other machines I get the following output:
> 
> START_AIPS: Will use or start first available Unix Socket based TV
> START_AIPS: Your initial AIPS printer is the
> START_AIPS:  - system name , AIPS type
> 
> START_AIPS: User data area assignments:
> DADEVS.PL: This program is untested under Perl version 5.010
>   (Using global default file /usr/AIPS/DA00/DADEVS.LIST for DADEVS.PL)
>    Disk 1 (1) is /data/aips/YODA_1
> 
> Tape assignments:
>    Tape 1 is REMOTE
>    Tape 2 is REMOTE
> 
> START_AIPS: I am GUESSING you are at a workstation called yoda
> START_AIPS:  - but have chosen to run the TV locally on YODA
> START_AIPS: Starting TV servers on yoda asynchronously
> START_AIPS:  - WITH Unix Sockets as requested...
> START_AIPS: Starting TPMON daemons on YODA asynchronously...
> Starting up 31DEC09 AIPS with normal priority
> DADEVS.PL: This program is untested under Perl version 5.010
> UNIXSERVERS: Start TV LOCK daemon TVSRV1 on yoda
> TVSERVER: Starting AIPS TV locking, Unix (local) domain
> UNIXSERVERS: Start XAS1 on yoda, DISPLAY :0.0
> XAS: ** TrueColor FOUND!!!
> XAS: ***  Using shared memory option for speed ***
> XAS: Using screen width 1270 height 924,
>      max grey level 8191 in 16 grey-scale memories
> UNIXSERVERS: Start graphics server TKSRV1 on yoda, display :0.0
> UNIXSERVERS: Start message server MSSRV1 on yoda, display :0.0
> 
>  at this point the terminal freezes and must by closed and restarted.  If
> I run aips on the machine where it was installed, it gives the following
> output:
> 
> START_AIPS: Will use or start first available Unix Socket based TV
> START_AIPS: Your initial AIPS printer is the
> START_AIPS:  - system name , AIPS type
> 
> START_AIPS: User data area assignments:
> DADEVS.PL: This program is untested under Perl version 5.010
>   (Using global default file /usr/AIPS/DA00/DADEVS.LIST for DADEVS.PL)
>    Disk 1 (1) is /data/aips/XWING_1
>    Disk 2 (2) is /data/aips/XWING_2
> 
> Tape assignments:
>    Tape 1 is REMOTE
>    Tape 2 is REMOTE
> 
> START_AIPS: Starting TV servers on xwing asynchronously
> START_AIPS:  - WITH Unix Sockets as requested...
> START_AIPS: Starting TPMON daemons on XWING asynchronously...
> Starting up 31DEC09 AIPS with normal priority
> Begin the one true AIPS number 1 (release of 31DEC09) at priority =   0
> AIPS 1: You are not on a local TV device, welcome stranger
> AIPS 1: You are assigned TV device/server   7
> AIPS 1: You are assigned graphics device/server   7
> AIPS 1: Enter user ID number
> ?DADEVS.PL: This program is untested under Perl version 5.010
> UNIXSERVERS: Start TV LOCK daemon TVSRV1 on xwing
> TVSERVER: Starting AIPS TV locking, Unix (local) domain
> UNIXSERVERS: Start XAS1 on xwing, DISPLAY localhost:10.0
> UNIXSERVERS: Start graphics server TKSRV1 on xwing, display localhost:10.0
> XAS: ** TrueColor FOUND!!!
> XAS: Cannot use shared memory on remote XAS link
> Host name is XWING, display shows it at LOCALHOST
> XAS: !!! Shared memory not selected !!!
> XAS: Using screen width 1270 height 924,
>      max grey level 8191 in 16 grey-scale memories
> UNIXSERVERS: Start message server MSSRV1 on xwing, display localhost:10.0
> 
> after pressing enter, AIPS asks for the user number and works fine.  I
> have check the permissions on all the files and they are set so the other
> computers have access to the files.  I have know idea why the two outputs
> are different and why AIPS does not run on the other machines.  Any help
> would be appreciated.
> 

I am going to have to ponder this - a couple of questions.

Are lock daemons running on all machines.  AIPS applies blocking and 
non-blocking locks to data file all over the place.  I have seen it hang 
when some sort of daemon was not running.

In the first case, it would appear that you are at the console of yoda 
and are running on yoda.  In the second you are at the console of 
something else and ssh'ed into xwing.  Is that correct?  Note that 
tv=local is really not intended for that case although it should work 
albeit slowly.  Usually you want XAS et al to run on the computer at 
which you are sitting and have xwing talk to it via the Inet sockets.

Eric Greisen