Re: set share to stop a guest from getting service ?

[Tom Duerbusch]

The problem with putting a Linux guest to sleep, is that they tend not to wake 
up so well.

Obviously, all IP communications times out.
CRON processes floods the image when it is woken.
Any database and/or logical units of work, tend to abend.

All of this was when I tried to force guests to sleep back on SLES7 on a 
MP3000.  My thought was, if it isn't in use, force it to sleep.  We will wake 
it up when necessary.  My thought was to avoid the overhead in IPLing images 
when they were needed and eliminate the overhead of the idling systems.  There 
were a lot of things we didn't know about in those days. 

Tom Duerbusch
THD Consulting


From:
Rick Troth <[EMAIL PROTECTED]>
To:
IBMVM@LISTSERV.UARK.EDU 
Date:
04/01/2008 02:46 PM
Subject:
Re: set share to stop a guest from getting service ?



> The goal will be to put the identified guest to 'sleep' until we can
> evaluate if it is truly causing issues.   ...

I think I have followed this whole thread,
and I don't seem to recall either of these suggested:

 cp send cp thebadguest sleep
  -or-
 cp send cp thebadguest stop

If all you want to do is "hit the red button" for a period,
then issue a CP STOP command.  Then CP BEGIN when you want to resume.
You could also issue a CP SLEEP with or without a time.  (Usually used
with a time spec.  Without a time spec, CP BEGIN or console interrupt
to wake up and resume execution.)

>From the console of that guest, with default TERM LINEND, try

 #cp sleep
  -or-
 #cp stop

-- R;   <><



Law of Cat Acceleration

  A cat will accelerate at a constant rate, until he gets good and
  ready to stop.

Re: set share to stop a guest from getting service ?

[Alan Altmark]

On Tuesday, 04/01/2008 at 05:48 EDT, Rick Troth <[EMAIL PROTECTED]> wrote:
> cp send cp thebadguest sleep
> -or-
> cp send cp thebadguest stop

Also an excellent use of the CP FOR command.  For those not familiar with 
it, it has a slightly different authorization scheme:

1. If you are the active SECUSER of a user, you can use CP FOR command
2. If you are using an ESM and you have LOGON BY privilege to the target 
user, you can use FOR, even if you aren't the active SECUSER.

Alan Altmark
z/VM Development
IBM Endicott

Re: set share to stop a guest from getting service ?

[Rob van der Heij]

On Tue, Apr 1, 2008 at 11:46 PM, Rick Troth <[EMAIL PROTECTED]> wrote:

> > The goal will be to put the identified guest to 'sleep' until we can
>  > evaluate if it is truly causing issues.   ...
>
>  I think I have followed this whole thread,
>  and I don't seem to recall either of these suggested:
>
> cp send cp thebadguest sleep

Very true. I believe the motivation for the alternatives is based on
wishful thinking that when you give the server only a tiny amount of
CPU time it will use that to manage network connections and other
important things, and not spend it on looping...   When you squeeze it
hard enough things will be broken anyway when you get at it, just like
some aspects will have changed when you wait long enough (e.g. clients
have moved on).

Rob

PS There is also a lot of value in a performance monitor that can tell
you when the problem started and will let you review interesting
numbers from that time...
-- 
Rob van der Heij
Velocity Software GmbH
http://velocitysoftware.com/

Re: set share to stop a guest from getting service ?

[Lionel B. Dyck]

Rick - I love your suggestion - THANK YOU

Lionel B. Dyck, Consultant/Specialist 

Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED] 
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is service. We're 
here to make lives better." 

I never guess. It is a capital mistake to theorize before one has data. 
Insensibly one begins to twist facts to suit theories, instead of theories 
to suit facts. 
- Sir Arthur Conan Doyle 

NOTICE TO RECIPIENT: If you are not the intended recipient of this e-mail, 
you are prohibited from sharing, copying, or otherwise using or disclosing 
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From:
Rick Troth <[EMAIL PROTECTED]>
To:
IBMVM@LISTSERV.UARK.EDU
Date:
04/01/2008 02:46 PM
Subject:
Re: set share to stop a guest from getting service ?



> The goal will be to put the identified guest to 'sleep' until we can
> evaluate if it is truly causing issues.   ...

I think I have followed this whole thread,
and I don't seem to recall either of these suggested:

 cp send cp thebadguest sleep
  -or-
 cp send cp thebadguest stop

If all you want to do is "hit the red button" for a period,
then issue a CP STOP command.  Then CP BEGIN when you want to resume.
You could also issue a CP SLEEP with or without a time.  (Usually used
with a time spec.  Without a time spec, CP BEGIN or console interrupt
to wake up and resume execution.)

>From the console of that guest, with default TERM LINEND, try

 #cp sleep
  -or-
 #cp stop

-- R;   <><


<>

Re: set share to stop a guest from getting service ?

[Rick Troth]

> The goal will be to put the identified guest to 'sleep' until we can
> evaluate if it is truly causing issues.   ...

I think I have followed this whole thread,
and I don't seem to recall either of these suggested:

cp send cp thebadguest sleep
 -or-
cp send cp thebadguest stop

If all you want to do is "hit the red button" for a period,
then issue a CP STOP command.  Then CP BEGIN when you want to resume.
You could also issue a CP SLEEP with or without a time.  (Usually used
with a time spec.  Without a time spec, CP BEGIN or console interrupt
to wake up and resume execution.)

>From the console of that guest, with default TERM LINEND, try

#cp sleep
 -or-
#cp stop

-- R;   <><

Re: set share to stop a guest from getting service ?

[Lionel B. Dyck]

Jim said:


Remember that when the guest has had absolute share set down to 1%, in 
order to do any trouble shooting, you'll have to boost up the share 
setting to be able to get on to the guest to diagnose the problem.  The 
looping condition will still most likely be running and you trying to 
logon won't be getting much resources.
Jim

The goal will be to put the identified guest to 'sleep' until we can 
evaluate if it is truly causing issues. To do that we have the Velocity 
toolset which has a real time and historical view so we should be able to 
do a quick triage and then either reset back to normal or force the guest 
off.

Thanks

Lionel B. Dyck, Consultant/Specialist 
Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED] 
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is service. We're 
here to make lives better." 

I never guess. It is a capital mistake to theorize before one has data. 
Insensibly one begins to twist facts to suit theories, instead of theories 
to suit facts. 
- Sir Arthur Conan Doyle 

NOTICE TO RECIPIENT: If you are not the intended recipient of this e-mail, 
you are prohibited from sharing, copying, or otherwise using or disclosing 
its contents. If you have received this e-mail in error, please notify the 
sender immediately by reply e-mail and permanently delete this e-mail and 
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Re: set share to stop a guest from getting service ?

[Jim Bohnsack]

Remember that when the guest has had absolute share set down to 1%, in 
order to do any trouble shooting, you'll have to boost up the share 
setting to be able to get on to the guest to diagnose the problem.  The 
looping condition will still most likely be running and you trying to 
logon won't be getting much resources.

Jim

Lionel B. Dyck wrote:

This is a multipart message in MIME format.
--=_alternative 00660C5F8825741D_=
Content-Type: text/plain; charset="US-ASCII"

Thanks to all - I just want to give the guest no or a minimum amount of 
CPU until we can diagnose what is going on (and in case we attempt to 
shoot the wrong guest :-)


Lionel B. Dyck, Consultant/Specialist 
Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED] 
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is service. We're 
here to make lives better." 

I never guess. It is a capital mistake to theorize before one has data. 
Insensibly one begins to twist facts to suit theories, instead of theories 
to suit facts. 
- Sir Arthur Conan Doyle 

NOTICE TO RECIPIENT: If you are not the intended recipient of this e-mail, 
you are prohibited from sharing, copying, or otherwise using or disclosing 
its contents. If you have received this e-mail in error, please notify the 
sender immediately by reply e-mail and permanently delete this e-mail and 
any attachments without reading, forwarding or saving them. Thank you. 
  


--
Jim Bohnsack
Cornell University
(607) 255-1760
[EMAIL PROTECTED]

Re: set share to stop a guest from getting service ?

[Lionel B. Dyck]

Thanks to all - I just want to give the guest no or a minimum amount of 
CPU until we can diagnose what is going on (and in case we attempt to 
shoot the wrong guest :-)

Lionel B. Dyck, Consultant/Specialist 
Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED] 
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is service. We're 
here to make lives better." 

I never guess. It is a capital mistake to theorize before one has data. 
Insensibly one begins to twist facts to suit theories, instead of theories 
to suit facts. 
- Sir Arthur Conan Doyle 

NOTICE TO RECIPIENT: If you are not the intended recipient of this e-mail, 
you are prohibited from sharing, copying, or otherwise using or disclosing 
its contents. If you have received this e-mail in error, please notify the 
sender immediately by reply e-mail and permanently delete this e-mail and 
any attachments without reading, forwarding or saving them. Thank you. 

Re: set share to stop a guest from getting service ?

[Jim Bohnsack]

If you're running Performance Tool Kit, you can use the PERFSVM monitor 
machine to control looping users.  I have PERFSVM set up to do a CP SET 
SHARE ABSOLUTE 1% on all users (except for users that can legitimately 
look like looping users) .  Mine is set up to look for users that exceed 
x% cpu utilization for y minutes.  You can control how minutes and how 
high a level of cpu. 


Jim

Schuh, Richard wrote:

This is a multi-part message in MIME format.

--_=_NextPart_001_01C89115.A6AC1BB9
Content-Type: text/plain;
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable

The cpu all stop will do as it says and stop it in its tracks. It needs
to have a secuser if it is disconnected and you have not disabled the 15
minute timeout.

Regards,=20
Richard Schuh=20

=20

=20




From: The IBM z/VM Operating System
[mailto:[EMAIL PROTECTED] On Behalf Of O'Brien, Dennis L
Sent: Friday, March 28, 2008 1:48 PM
To: IBMVM@LISTSERV.UARK.EDU
        Subject: Re: set share to stop a guest from getting service ?
=09
=09
Lionel,
SET SHARE userid RELATIVE 1 LIMITHARD should take it down as low
as it can go.  If you want no service at all, CP SEND CP userid SLEEP 99
HRS should do it.  I take it you don't want to just FORCE the userid?=20

   Dennis
O'Brien
=09
"A society that gets rid of all its troublemakers goes
downhill."  -- Robert A. Heinlein
=09
 =20

=20



From: The IBM z/VM Operating System
[mailto:[EMAIL PROTECTED] On Behalf Of Lionel B. Dyck
Sent: Friday, March 28, 2008 13:40
To: IBMVM@LISTSERV.UARK.EDU
Subject: [IBMVM] set share to stop a guest from getting service
?
=09
=09

Is there a way to set a z/VM guest that is misbehaving into a
state where it gets no service such as a SET SHARE of some flavor?=20
=09
Thx
=09

=09


Lionel B. Dyck, Consultant/Specialist=20
Enterprise Platform Services, Mainframe Engineering=20
KP-IT Enterprise Engineering=20
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]> =20
AIM: lbdyck | Yahoo IM: lbdyck=20
Kaiser Service Credo: "Our cause is health. Our passion is
service. We're here to make lives better."=20
=09
I never guess. It is a capital mistake to theorize before one
has data. Insensibly one begins to twist facts to suit theories, instead
of theories to suit facts.=20
- Sir Arthur Conan Doyle=20
=09
NOTICE TO RECIPIENT: If you are not the intended recipient of
this e-mail, you are prohibited from sharing, copying, or otherwise
using or disclosing its contents. If you have received this e-mail in
error, please notify the sender immediately by reply e-mail and
permanently delete this e-mail and any attachments without reading,
forwarding or saving them. Thank you.=20


--_=_NextPart_001_01C89115.A6AC1BB9
Content-Type: text/html;
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable






The cpu all stop will do as it says and stop it in its tracks. =
It needs=20
to have a secuser if it is disconnected and you have not disabled=20
the 15 minute timeout.

Regards, =
Richard Schuh=20

 
 

  
  
  From: The IBM z/VM Operating =
System=20
  [mailto:[EMAIL PROTECTED] On Behalf Of O'Brien, Dennis=20
  LSent: Friday, March 28, 2008 1:48 PMTo:=20
  IBMVM@LISTSERV.UARK.EDUSubject: Re: set share to stop a =
guest from=20
  getting service ?
  
  Lionel,
  SET=20
  SHARE userid RELATIVE 1 LIMITHARD should take it=20
  down as low as it can go.  If you want no service =
at all,=20
  CP SEND CP userid SLEEP 99 HRS should do it.  I take it you don't =
want to=20
  just FORCE the userid? 
    &nbs=
p;=
;=
&=
nbsp;  =20
  Dennis O'Brien"A society that gets rid of all its troublemakers =
goes=20
  downhill."  -- Robert A. Heinlein  
   
  
  
  From: The IBM z/VM Operating =
System=20
  [mailto:[EMAIL PROTECTED] On Behalf Of Lionel B.=20
  DyckSent: Friday, March 28, 2008 13:40To:=20
  IBMVM@LISTSERV.UARK.EDUSubject: [IBMVM] set share to stop a =
guest=20
  from getting service ?
  Is there =
a way to set a=20
  z/VM guest that is misbehaving into a state where it gets no service =
such as a=20
  SET SHARE of some flavor? Thx
  
  
  Lionel B. Dyck, =
Consultant/Specialist=20
  Enterprise =
Platform=20
  Services, Mainframe Engineering KP-IT Enterprise Engineering=20
  925-926-5332 (8-473-5332) | E-Mail: mailto:[EMAIL PROTECTED]">[EMAIL PROTECTED] AIM: lbdyck | Yahoo IM: lbdyck Kaiser Service Credo: "Our cause is =
health. Our=20
  passion is service. We're here to make lives better." =
I never guess. It is a =

Re: set share to stop a guest from getting service ?

[Schuh, Richard]

The cpu all stop will do as it says and stop it in its tracks. It needs
to have a secuser if it is disconnected and you have not disabled the 15
minute timeout.

Regards, 
Richard Schuh 

 

 




From: The IBM z/VM Operating System
[mailto:[EMAIL PROTECTED] On Behalf Of O'Brien, Dennis L
Sent: Friday, March 28, 2008 1:48 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: set share to stop a guest from getting service ?


Lionel,
SET SHARE userid RELATIVE 1 LIMITHARD should take it down as low
as it can go.  If you want no service at all, CP SEND CP userid SLEEP 99
HRS should do it.  I take it you don't want to just FORCE the userid? 

   Dennis
O'Brien

"A society that gets rid of all its troublemakers goes
downhill."  -- Robert A. Heinlein

  

 



From: The IBM z/VM Operating System
[mailto:[EMAIL PROTECTED] On Behalf Of Lionel B. Dyck
Sent: Friday, March 28, 2008 13:40
To: IBMVM@LISTSERV.UARK.EDU
Subject: [IBMVM] set share to stop a guest from getting service
?



Is there a way to set a z/VM guest that is misbehaving into a
state where it gets no service such as a SET SHARE of some flavor? 

Thx





Lionel B. Dyck, Consultant/Specialist 
Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED]
<mailto:[EMAIL PROTECTED]>  
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is
service. We're here to make lives better." 

I never guess. It is a capital mistake to theorize before one
has data. Insensibly one begins to twist facts to suit theories, instead
of theories to suit facts. 
- Sir Arthur Conan Doyle 

NOTICE TO RECIPIENT: If you are not the intended recipient of
this e-mail, you are prohibited from sharing, copying, or otherwise
using or disclosing its contents. If you have received this e-mail in
error, please notify the sender immediately by reply e-mail and
permanently delete this e-mail and any attachments without reading,
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Re: set share to stop a guest from getting service ?

[O'Brien, Dennis L]

Lionel,
SET SHARE userid RELATIVE 1 LIMITHARD should take it down as low as it
can go.  If you want no service at all, CP SEND CP userid SLEEP 99 HRS
should do it.  I take it you don't want to just FORCE the userid? 

   Dennis O'Brien

"A society that gets rid of all its troublemakers goes downhill."  --
Robert A. Heinlein

  

 



From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Lionel B. Dyck
Sent: Friday, March 28, 2008 13:40
To: IBMVM@LISTSERV.UARK.EDU
Subject: [IBMVM] set share to stop a guest from getting service ?



Is there a way to set a z/VM guest that is misbehaving into a state
where it gets no service such as a SET SHARE of some flavor? 

Thx




Lionel B. Dyck, Consultant/Specialist 
Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED]
  
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is service.
We're here to make lives better." 

I never guess. It is a capital mistake to theorize before one has data.
Insensibly one begins to twist facts to suit theories, instead of
theories to suit facts. 
- Sir Arthur Conan Doyle 

NOTICE TO RECIPIENT: If you are not the intended recipient of this
e-mail, you are prohibited from sharing, copying, or otherwise using or
disclosing its contents. If you have received this e-mail in error,
please notify the sender immediately by reply e-mail and permanently
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saving them. Thank you. 

Re: set share to stop a guest from getting service ?

[Peter . Webb]

I think with SET SHARE, a guest will always receive some time, although
it won't be much. If you really want to stop them, put them into a CP
READ state.

 

-Original Message-
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Lionel B. Dyck
Sent: March 28, 2008 16:40
To: IBMVM@LISTSERV.UARK.EDU
Subject: set share to stop a guest from getting service ?

 


Is there a way to set a z/VM guest that is misbehaving into a state
where it gets no service such as a SET SHARE of some flavor? 

Thx



Lionel B. Dyck, Consultant/Specialist 
Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED]
  
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is service.
We're here to make lives better." 

I never guess. It is a capital mistake to theorize before one has data.
Insensibly one begins to twist facts to suit theories, instead of
theories to suit facts. 
- Sir Arthur Conan Doyle 

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e-mail, you are prohibited from sharing, copying, or otherwise using or
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Re: set share to stop a guest from getting service ?

[Schuh, Richard]

How about send cp userid cpu all stop? A Begin command is required for
it to resume. 
 

Regards, 
Richard Schuh 

 

 




From: The IBM z/VM Operating System
[mailto:[EMAIL PROTECTED] On Behalf Of Lionel B. Dyck
Sent: Friday, March 28, 2008 1:40 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: set share to stop a guest from getting service ?



Is there a way to set a z/VM guest that is misbehaving into a
state where it gets no service such as a SET SHARE of some flavor? 

Thx





Lionel B. Dyck, Consultant/Specialist 
Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED]
  
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is
service. We're here to make lives better." 

I never guess. It is a capital mistake to theorize before one
has data. Insensibly one begins to twist facts to suit theories, instead
of theories to suit facts. 
- Sir Arthur Conan Doyle 

NOTICE TO RECIPIENT: If you are not the intended recipient of
this e-mail, you are prohibited from sharing, copying, or otherwise
using or disclosing its contents. If you have received this e-mail in
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Re: set share to stop a guest from getting service ?

[Marcy Cortes]

cp set share badguy absolute 0.1% limithard
 
Almost zero... but that's as close as you can get!
 
 
Marcy


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From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Lionel B. Dyck
Sent: Friday, March 28, 2008 1:40 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: [IBMVM] set share to stop a guest from getting service ?



Is there a way to set a z/VM guest that is misbehaving into a state
where it gets no service such as a SET SHARE of some flavor? 

Thx




Lionel B. Dyck, Consultant/Specialist 
Enterprise Platform Services, Mainframe Engineering 
KP-IT Enterprise Engineering 
925-926-5332 (8-473-5332) | E-Mail: [EMAIL PROTECTED]
  
AIM: lbdyck | Yahoo IM: lbdyck 
Kaiser Service Credo: "Our cause is health. Our passion is service.
We're here to make lives better." 

I never guess. It is a capital mistake to theorize before one has data.
Insensibly one begins to twist facts to suit theories, instead of
theories to suit facts. 
- Sir Arthur Conan Doyle 

NOTICE TO RECIPIENT: If you are not the intended recipient of this
e-mail, you are prohibited from sharing, copying, or otherwise using or
disclosing its contents. If you have received this e-mail in error,
please notify the sender immediately by reply e-mail and permanently
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