³Twitchy² - is a squirrel and best friend of Wolf W. Wolf in Hoodwinked.
³twitchy² as used below makes me, well Twitchy.
Could you elaborate on why use of SFS via NFS ³Sort of makes the z guys
twitchy²
--. .- .-. -.--
Gary Dennis
Mantissa Corporation
On 5/1/09 7:39 AM, Dean, David
On May 1, 2009, at 8:01 AM, Gary M. Dennis wrote:
Could you elaborate on why use of SFS via NFS “Sort of makes the z
guys twitchy”
I'm not the original poster who made that comment, but I understand it.
Taking a perfectly nice file system and remapping it twice (to NFS,
and then through
Layers upon layers.
Or ... airport hubs and multi-hop flights.
You need to go from Nashville to Brimingham, but you're flying Delta.
Well, Delta's hub is in Atlanta, so your trip will have a layover there.
Might as well drive!
Maybe you got a new office.
You're spartan enough, so you can haul
We're looking at power options for a z890 in a backup datacenter. The
Installation and Planning manual says that the z890 can run off either
single phase or three phase power. The site cost for a three phase suppl
y
is more than the cost for a single phase supply. I understand what singl
e
On: Fri, May 01, 2009 at 10:41:52AM -0500,Brian Nielsen Wrote:
} We're looking at power options for a z890 in a backup datacenter. The
} Installation and Planning manual says that the z890 can run off either
} single phase or three phase power. The site cost for a three phase supply
} is
It is running Now! I spent two weeks troubleshooting. :)
I think IPWZARD help me create those TCPIP stack lines?
Before system.dtcparms is
|...+1+2+3+4+5+6+7...
.**
.*
The IBM z/VM Operating System IBMVM@LISTSERV.UARK.EDU wrote on 05/01/2009
09:13:17 AM:
It is running Now! I spent two weeks troubleshooting. :)
I think IPWZARD help me create those TCPIP stack lines?
Ah...IPWIZARD is meant to be used only with real network devices, not
virtual NICs. I just
All our Linux servers have entries in a LINUX NAMES file. AUTOLOG2 runs an exec
that pulls the info and issues the GRANTS at IPL time.
Easier to keep up with for me.
Bob Bates
Enterprise Hosting Services
w. (469)892-6660
c. (214) 907-5071
This message may contain confidential and/or
Three phase is more efficient than single phase. You may save on electric
bills but I am not sure. Also, I think if you take a short power hit on a
single phase unit (without battery backup), you have a higher chance of the
box going down than if you were to take a hit on a 3 phase powered unit.
On Fri, 1 May 2009 12:11:40 -0400, Rich Greenberg ric...@panix.com wrot
e:
Check the power needed in Kilowatts for 3ph vs 1ph. And check with the
power company if a 3ph kwh (killowatt hour) costs the same or more or
less than a 1ph kwh.
The Installation and Planning manual lists maximum system
On Fri, 1 May 2009 12:01:28 -0400, Aria Bamdad a...@bsc.gwu.edu wrote:
Three phase is more efficient than single phase. You may save on electr
ic
bills but I am not sure. Also, I think if you take a short power hit on
a
single phase unit (without battery backup), you have a higher chance of
On: Fri, May 01, 2009 at 11:53:04AM -0500,Brian Nielsen Wrote:
} In any case, cost per kwh is not relevant since the site is charging a
} flat fee for the installed circuit, not for the amount of power drawn
} through the circuit.
In that case I would suggest 3ph for the redundancy and better
The reason to turn off 3590E hardware compression, is if you having
problems feeding the beast. You get faster backups if you can keep
the drive going.
An IBM 3590E writes to tape at 14 MBs. If hardware compression is
turned on and you are getting 3:1 compression, then you have to feed the
Thanks for the update. I can continue thinking about my own z/VM 5.2 to z/VM
5.4 upgrade plans.
There are a lot of considerations. Near 24X7 shop or more near 9X5 (impacting
test time).
System programmer experience, not only in general, but in that particular shop.
It is very easy to move a
Two excellent explanations by Mr. Troth and Mr. Laflamme, they are right
on. Thank you. The sad part is we set this scenario up to overcome
POLITICAL boundaries between I/S fiefdoms and showcase the technologies.
We do not do this in production.
Some of the guys still tics.
David Dean
Yep, rule of thumb as well as 98% of the time, vdisk for swap is the way to go.
But there still is use for swap on real disk. One is to throttle the image,
the other is to keep the max resident size down sufficiently enough to keep
from impacting production systems by overloading the paging
Gentlemen,
Our experience is from VSE/ESA 2.3 + VM/ESA 3.1 to z/VM 5.2 and then to 5
.3.
We run in a 9672, z890 and now in a z9.
It is easy to upgrade VM releases, but we spent three years migrating fro
m
ACF/2 to Top Secret as directed ( forced ) by CA. This was the real probl
em
but I
Take a look at Overhead Deltas for VSE Releases which is page 5 of the
following PDF:
ftp://ftp.software.ibm.com/eserver/zseries/zos/vse/pdf3/techconf2007/sanantonio/E54_zVSE_Performance_Update.pdf
Does your situation nearly match those numbers? Or are they quite a
bit more?
If quite a bit
On Friday, 05/01/2009 at 01:36 EDT, Dean, David (I/S)
david_d...@bcbst.com wrote:
Two excellent explanations by Mr. Troth and Mr. Laflamme, they are right
on. Thank you. The sad part is we set this scenario up to overcome
POLITICAL boundaries between I/S fiefdoms and showcase the
Maybe some of us should reverse-engineer it.
Surely it can't be as bad as NTF... er, uh, ... a certain other
filesystem which has required reverse engineering to get it into Linux
land.
-- R;
On Fri, May 1, 2009 at 3:46 PM, Alan Altmark alan_altm...@us.ibm.com wrote:
On Friday,
On Friday, 05/01/2009 at 04:06 EDT, Richard Troth vmcow...@gmail.com
wrote:
Maybe some of us should reverse-engineer it.
Surely it can't be as bad as NTF... er, uh, ... a certain other
filesystem which has required reverse engineering to get it into Linux
land.
Morituri te Salutant! :-)
Is that supposed to be a warning that you will fight them to the death? :-)
Will it just be you and Chuckie, or will you have help?
Regards,
Richard Schuh
-Original Message-
From: The IBM z/VM Operating System
[mailto:ib...@listserv.uark.edu] On Behalf Of Alan Altmark
Sent:
Nope, it was me doing the shutdown reipl and no ucb on it.
Could a duplicate volume message cause it? (not cpowned).
Marcy
This message may contain confidential and/or privileged information. If you
are not the addressee or authorized to receive this for the addressee, you must
not use, copy,
Operations made me curious today.
The said sometimes when we do our SHUTDOWN REIPL thing on the disaster test
systems, they have to enter FORCE.
Auto_Warm_IPL is on.
Does it do that because of a new CPLOAD module?
This is the only relevant message:
12:12:10 HCPWRM904E System recovery failure;
Having done lots of SHUTDOWN REIPL with a new CPLOAD MODULE, I highly
doubt that is the cause.
Are you sure they are not doing: SHUTDOWN RIPL ucb
I have seen this on some CNR tests because you are IPLing using a
different volume where the checkpoint area is on a different area of the
volume.
The only two times that I remember a SHUTDOWN REIPL failing are when
changing IPL volumes or someone deactivated the LPAR before the SHUTDOWN
completed with the WARM START DATA saved message. I know, Why would
someone deactivate an LPAR if they issued a SHUTDOWN REIPL? I dunno
but it has
Nope, no deactivates unless GDPS was misbehaving :) ...
Ops who know what they are doing (and I was on the phone with them)...
Duplicate volume was a user included volume, not a cpowned one...
Not that big of a deal but I was surprised to hear the operator comment that he
has to issue it often.
I think it's more along the lines of being used ironically and
dramatically when beginning a risky activity of uncertain outcome.
Schuh, Richard wrote:
Is that supposed to be a warning that you will fight them to the death? :-)
Will it just be you and Chuckie, or will you have help?
Regards,
Nope, it was me doing the shutdown reipl and no ucb on it.
Could a duplicate volume message cause it? (not cpowned).
12:12:10 HCPWRM904E System recovery failure; incorrect warm start data.
This means that some of the system information that is saved in the
checkpoint (most likely) and/or warm
On: Fri, May 01, 2009 at 04:36:47PM -0500,Marcy Cortes Wrote:
} Operations made me curious today.
} The said sometimes when we do our SHUTDOWN REIPL thing on the disaster test
systems, they have to enter FORCE.
} Auto_Warm_IPL is on.
} Does it do that because of a new CPLOAD module?
} This is
Is the doc in LookAt Messages
(http://www-1.ibm.com/servers/eserver/zseries/zos/bkserv/lookat/ )
Regards,
Richard Schuh
-Original Message-
From: The IBM z/VM Operating System
[mailto:ib...@listserv.uark.edu] On Behalf Of Rob van der Heij
Sent: Thursday, April 30, 2009 5:35 AM
I think John has the answer. How big are your checkpoint and warm start areas?
9 cyl. As big as it gets.
Marcy
This message may contain confidential and/or privileged information. If you
are not the addressee or authorized to receive this for the addressee, you must
not use, copy,
After a brief discussion of the previous smaller sizes during a SHARE Linux
and VM Technical Steering Committee meeting a few years ago, IBM changed the
distributed z/VM checkpoint and warmstart sizes to the max 9 cyls each.
Mike Walter
Hewitt Associates
(Sent from the wee keyboard on a
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