On Fri, Jun 5, 2009 at 9:29 PM, Joseph J Veilleux <joeveill...@us.ibm.com>wrote:
>
> While most operating systems (UNIX, Linux, et al) don't offer this
> capability (to abort a pending/in-progress shutdown), Windows does provide
> that capability. In my opinion this is a bad feature and I don't like it,
> but there it is. That's probably where the requester got the idea. Score one
> for Microsoft.
>
> To see this feature in operation, do the following:
>
> 1. Go to a Windows machine (any comparatively-modern version of Windows:
> 2000, XP, 2003, and I think 2008 and Vista too).
>
> 2. Open two command prompt windows.
>
> 3. In the first command prompt window, type the following command BUT DON'T
> PRESS ENTER (yet):
> shutdown -a
>
> 4. Open a second command prompt window, type a command like the following
> and press Enter:
> shutdown -r -t 60 -c "Testing abort-system-shutdown"
> This pops up a UI with a countdown timer stating that the system will
> shut down in 60 seconds (...59, 58, 57,.....)
>
> 5. Quickly go back to the first command-prompt window and press Enter. This
> executes the 'shutdown -a' command which will abort the in-progress system
> shutdown.
>
> The requester seems to be asking for a feature like this for STAF. Offhand
> I'm not sure I see the value, but maybe that's just me.
>
> David's suggestion to pop up some kind of UI to ask the user if they're
> really sure is OK, except that it doesn't offer the opportunity to reply in
> the negative (i.e. "no, I don't want you to shut down!") other than by
> leaving the UI up indefinitely. Perhaps if the STAF shutdown service was
> enhanced to accept an 'abort' action, to abort an already-in-progress
> shutdown, then that's all that would be needed. The STAF team wouldn't have
> to build any kind of a fancy UI because the method David suggests could be
> used to build a UI.... and if the user told the UI "no, I do not want to
> shut down" then the UI program could issue the new STAF LOCAL SHUTDOWN ABORT
> command.
Providing 'ABORT' command in 'SHUTDOWN' service would be a better option.
>
>
> As an aside, the requester's real desire does not seem to be this
> complicated (to be able to dynamically "steer" an in-progress
> system-shutdown). Really they are just looking to make sure that STAF is up
> all the time. That could be handled in other ways. One crude way would be to
> use 'cron' (on UNIX/Linux) or the Windows 'scheduled task' facility to start
> STAF every minute or so. Most times STAF would already be running so the
> command would notice and quit. ...but if STAF had been shut down, this would
> start it back up. Obviously that's a little crude because there's the
> potential for a minute or so gap in STAF being available.
In this case, if the STAFProc is restarted, then again it is required to
submit the STAXJob to the STAX execution engine and all the previously used
shared variable losts.
>
>
> A more robust solution would be to write a "watchdog" program to sit around
> STAFProc, to start it and wait on its completion. If it completes, start it
> again. Obviously that has the potential to go haywire (what if there's a
> configuration problem and STAF won't start? this would sit in a loop and
> probably grind the system to a halt), but if carefully implemented it might
> yield the desired result.
>
> Hope this helps...
>
>
> ----------------------------------------------------------------------------------------
> Joe Veilleux
> IBM/Lotus Domino Server Quality Engineering
> 5 Technology Park Drive
> Westford MA 01886
> Email: joeveill...@us.ibm.com
>
>
>
> *David Bender/Austin/i...@ibmus*
>
> 06/05/2009 10:11 AM
> To
> Mohammad Jamal <md.shahid.ja...@gmail.com>
> cc
> staf-users@lists.sourceforge.net Subject
> Re: [staf-users] How to prevent shutdown of STAF?
>
>
>
>
>
>
> I don't think we'll be adding this capability to STAF. Shutting down STAF
> is similar to shutting down an operating system...if you submit a shutdown
> request to the OS, it is going to shut down, and therre's no way to "cancel"
> it.
>
> However, there is a way you could have an additional confirmation during
> the STAF shutdown. In STAF V3.2.4 we added a new "LifeCycle" service (
> http://staf.sourceforge.net/current/STAFUG.htm#HDRLIFECYCLESRV) that
> allows you to register STAF service requests that you want to have executed
> when STAFProc starts or shuts down. You could register a request that would
> act as the confirmation of the shutdown. Here is a simplified example:
>
> $ STAF local LIFECYCLE REGISTER PHASE shutdown MACHINE local SERVICE
> process REQUEST "START SHELL COMMAND notepad WAIT"
>
> In this simplified example we are just submitting a PROCESS START request
> to start notepad, and specifying the WAIT option so the request is
> synchronous (it will not complete until the notepad is closed). So, when
> you submit a "STAF local SHUTDOWN SHUTDOWN" request, the LifeCycle
> registrations with a phase of "shutdown" will be executed before STAFProc
> actually shuts down. So, the notepad application would be opened, and all
> of the other STAF service requests would still continue indefinitely. Then,
> when you close the notepad application, the shutdown would continue as
> usual.
>
> So, obviously you would not start "notepad" in your scenario, but you could
> write a Java app, for example, that would present a UI dialog on the system,
> confirming if the user really wanted to shutdown STAF, and if the user
> indicated that they wanted to continue shutting down STAF, then the Java app
> would exit and the STAF shutdown would continue.
>
> David Bender
> STAF/STAX Development
> (512-286-5315)
> IBM Austin Bldg. 903-5B002
> Internet: bda...@us.ibm.com
>
>
> *Mohammad Jamal <md.shahid.ja...@gmail.com>*
>
> 06/05/2009 07:45 AM
>
> To
> David Bender/Austin/i...@ibmus cc
> staf-users@lists.sourceforge.net Subject
> Re: [staf-users] How to prevent shutdown of STAF?
>
>
>
>
>
>
>
>
> On Wed, Jun 3, 2009 at 5:54 PM, David Bender
> <*bda...@us.ibm.com*<bda...@us.ibm.com>>
> wrote:
>
> No, Can you explain why you would need this capability?
>
> As STAF Framework providing the functionalities for running the processes
> from one system to another system (if on both the system, STAF Framework
> should be running state).
>
> We are working on a tool for performing regression testing of compilers.
> This tool uses the services of STAF.
>
> With the help of tool, a testing is started and monitor from a machine
> (Test Server) on several other remote machines.
>
> In this process, a STAX Job is created from Test Server and executed on
> remote machines. Remote machine user is not involved in this testing process
> any ways.
>
> So while executing the STAX Job on remote machine, if STAF framework on
> remote machine is closed accidentally, then testing process is also
> terminated, and again it is required to start the testing process from the
> beginning.
>
> If STAF framework provides some functionality of displaying a warning
> message while terminating the STAF framework, then the accidental
> termination of STAF framework can be avoided.
>
>
>
>
>
> David Bender
> STAF/STAX Development
> (512-286-5315)
> IBM Austin Bldg. 903-5B002
> Internet: *bda...@us.ibm.com* <bda...@us.ibm.com>
>
> *Mohammad Jamal <**md.shahid.ja...@gmail.com*<md.shahid.ja...@gmail.com>
> *>*
>
> 06/03/2009 03:37 AM
>
> To
> David Bender/Austin/i...@ibmus cc
> Subject
> Re: [staf-users] How to prevent shutdown of STAF?
>
>
>
>
>
>
>
>
> On Tue, Jun 2, 2009 at 7:07 PM, David Bender
> <*bda...@us.ibm.com*<bda...@us.ibm.com>>
> wrote:
>
> No. Once the SHUTDOWN SHUTDOWN request is submitted, STAF will shut down.
>
> Thanks.
>
> Would this feature be included in comming version of STAF?
>
>
>
> David Bender
> STAF/STAX Development
> (512-286-5315)
> IBM Austin Bldg. 903-5B002
> Internet: *bda...@us.ibm.com* <bda...@us.ibm.com>
> *Mohammad Jamal <**md.shahid.ja...@gmail.com*<md.shahid.ja...@gmail.com>
> *>*
>
> 06/01/2009 11:53 PM
>
> To
> STAF User
> <*staf-us...@lists.sourceforge.net*<staf-users@lists.sourceforge.net>
> > cc
> Subject
> [staf-users] How to prevent shutdown of STAF?
>
>
>
>
>
>
>
> Greetings
>
> After executing the command 'STAF LOCAL SHUTDOWN SHUTDOWN', Is there any
> way to prevent the process of shutting down of STAF framework?
>
>
>
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> enjoy capabilities such as Networking, Storage and Virtualization.
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