Anyone using PAV enabled DASD with IDMS 16.0?

[ca.portal.admin]

Hi,



I will make this appeal again just in case someone is trying this out
now. Does anyone on the list have experience with PAV enabled DASD
running IDMS 16.0? We are trying to get some hard numbers to see if this
is worthwhile.



Thanks



Chris Wood

Alberta Department of Energy

CANADA

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Anyone using PAV enabled DASD with IDMS 16.0?
"Hi,



I will make this appeal again just in case someone is trying this out
now. Does anyone on the list have experience with PAV enabled DASD
running IDMS 16.0? We are trying to get some hard numbers to see if this
is worthwhile.



Thanks



Chris Wood

Alberta Department of Energy

CANADA

This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal and or privileged information. Please contact us immediately if you are not the intended recipients of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed.

"
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Re: Anyone using PAV enabled DASD with IDMS 16.0?
"Bob,

Will it not help with CONN(ect) DISC(onnect) waits as well? We see a few
IOSQ waits but not as many as CONN and DISC.

Thanks

Chris

[ca.portal.admin]

Hi,



I will make this appeal again just in case someone is trying this out
now. Does anyone on the list have experience with PAV enabled DASD
running IDMS 16.0? We are trying to get some hard numbers to see if this
is worthwhile.



Thanks



Chris Wood

Alberta Department of Energy

CANADA

This communication is intended for the use of the recipient to which it
is addressed, and may contain confidential, personal and or privileged
information. Please contact us immediately if you are not the intended
recipients of this communication, and do not copy, distribute, or take
action relying on it. Any communication received in error, or subsequent
reply, should be deleted or destroyed.
This communication is intended for the use of the recipient to which it
is addressed, and may contain confidential, personal and or privileged
information. Please contact us immediately if you are not the intended
recipients of this communication, and do not copy, distribute, or take
action relying on it. Any communication received in error, or subsequent
reply, should be deleted or destroyed.
This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal and or privileged information. Please contact us immediately if you are not the intended recipients of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed.

"
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One Final PAV Question
"Hopefully to finish this issue off until someone says they are doing it.
Does having PAV save CPU? I don't think that it could save I/O as it
just serves up the data faster to the system.



Thanks



Chris

This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal and or privileged information. Please contact us immediately if you are not the intended recipients of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed.

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Normal

Normal
resetting a terminal
"Hi,

I'm hoping that someone has already written something for this. I'm
looking to setting up a task to which you pass the lterm name, and the
task varies the lterm off, the pterm off, the pterm back on, then the
lterm on.

If you have something to do this, would you be willing to share it?

Thanks,
Laura Rochon
Ajilon Consulting

"
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Normal

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Re: resetting a terminal
"Two Options:
1) ad hoc UCFBATCH/CULPRIT batch job to look for OUTSERV terminals and
put them back INSRV
2) Asynchronous Assembler routine to look for OUTSERV terminals and put
them back INSRV

Let me know if you are interested in either one, and whether it is for
any terminal, or just for printers. . .

dem

[ca.portal.admin]

Hi,



I will make this appeal again just in case someone is trying this out
now. Does anyone on the list have experience with PAV enabled DASD
running IDMS 16.0? We are trying to get some hard numbers to see if this
is worthwhile.



Thanks



Chris Wood

Alberta Department of Energy

CANADA

This communication is intended for the use of the recipient to which it
is addressed, and may contain confidential, personal and or privileged
information. Please contact us immediately if you are not the intended
recipients of this communication, and do not copy, distribute, or take
action relying on it. Any communication received in error, or subsequent
reply, should be deleted or destroyed.
This communication is intended for the use of the recipient to which it
is addressed, and may contain confidential, personal and or privileged
information. Please contact us immediately if you are not the intended
recipients of this communication, and do not copy, distribute, or take
action relying on it. Any communication received in error, or subsequent
reply, should be deleted or destroyed.

"
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Re: Anyone using PAV enabled DASD with IDMS 16.0?
"Thanks again Bob.

According to an IBM Systems Journal article a cache miss can be improved
by PAV. See what you think.
http://www.research.ibm.com/journal/sj/422/meritt.html

Chris

[ca.portal.admin]

Hi,



I will make this appeal again just in case someone is trying this out
now. Does anyone on the list have experience with PAV enabled DASD
running IDMS 16.0? We are trying to get some hard numbers to see if this
is worthwhile.



Thanks



Chris Wood

Alberta Department of Energy

CANADA

This communication is intended for the use of the recipient to which it
is addressed, and may contain confidential, personal and or privileged
information. Please contact us immediately if you are not the intended
recipients of this communication, and do not copy, distribute, or take
action relying on it. Any communication received in error, or subsequent
reply, should be deleted or destroyed.
This communication is intended for the use of the recipient to which it is addressed, and may contain confidential, personal and or privileged information. Please contact us immediately if you are not the intended recipients of this communication, and do not copy, distribute, or take action relying on it. Any communication received in error, or subsequent reply, should be deleted or destroyed.

"
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Re: Anyone using PAV enabled DASD with IDMS 16.0?
"Chris ,

I don't think you would see any great benefit in CONNECT time which
indicates data transfer time (it is susceptible to poor dataset blocking
) nor DISCONNECT time which indicates a cache miss ( susceptible to data
access pattern and storage processor performance and configuration ) .
IOSQ indicates inter and intra dataset contention ( UCB wait -
operating system limitation since 1960s ) which is susceptible to data
access rate , dataset placement across logical DASD volumes and IDMS
Area to file mapping . Good luck .

Bob

BT plc

[ca.portal.admin]

Chris ,

We are not doing this , but my advice is - check your IDMS DASD volume
performance with your z/OS sysprog , if the IOSQ component of the
service time is significant then you will greatly improve the service
time using dynamic PAVs ; IOSQ will be greatly reduced or eliminated .
If you don't suffer IOSQ time then you would not get any benefit .

Bob

[ca.portal.admin]

Chris ,

We are not doing this , but my advice is - check your IDMS DASD volume
performance with your z/OS sysprog , if the IOSQ component of the
service time is significant then you will greatly improve the service
time using dynamic PAVs ; IOSQ will be greatly reduced or eliminated .
If you don't suffer IOSQ time then you would not get any benefit .

Bob

[ca.portal.admin]

Chris ,

We are not doing this , but my advice is - check your IDMS DASD volume
performance with your z/OS sysprog , if the IOSQ component of the
service time is significant then you will greatly improve the service
time using dynamic PAVs ; IOSQ will be greatly reduced or eliminated .
If you don't suffer IOSQ time then you would not get any benefit .

Bob

[ca.portal.admin]

Chris ,

I don't think you would see any great benefit in CONNECT time which
indicates data transfer time (it is susceptible to poor dataset blocking
) nor DISCONNECT time which indicates a cache miss ( susceptible to data
access pattern and storage processor performance and configuration ) .
IOSQ indicates inter and intra dataset contention ( UCB wait -
operating system limitation since 1960s ) which is susceptible to data
access rate , dataset placement across logical DASD volumes and IDMS
Area to file mapping . Good luck .

Bob

BT plc

[ca.portal.admin]

Bob,

Will it not help with CONN(ect) DISC(onnect) waits as well? We see a few
IOSQ waits but not as many as CONN and DISC.

Thanks

Chris

[ca.portal.admin]

Bob,

Will it not help with CONN(ect) DISC(onnect) waits as well? We see a few
IOSQ waits but not as many as CONN and DISC.

Thanks

Chris