in real storage
than other user pages. We once used large V-disks as sort work area,
performance of the system was degraded. This was in the VM/ESA R2(?) era,
with less real storage available than in a modern system.
See http://www.urban-myths.com/vdisk ;-)
Unlike VDISK that comes out
MDISK 700 FB-512V-DISK 524288
User3 has MDISK 700 FB-512V-DISK 131072
How are they shared?
2) I currently have:
q vdisk u
VDISK USER LIMIT IS 144000 BLK
Ready; T=0.01/0.01 09:39:02
@LISTSERV.UARK.EDU
Subject: Nedd some help undersdtanding vdisk
I'm really struggling with these displays and definitions. For VM 5.4:
1) The manual says v-disk are shareable, created by the first user and deleted
after the last user.
If in user direct I have v-disk defined for 3 user:
User1 has
)
Sent: Wednesday, April 29, 2009 10:30 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Nedd some help undersdtanding vdisk
a VDISK is shared by CP LINK-ing to it
for example
USER1 can CP LINK USER2 700 A700 RR
VDISK NCIALPHA have 524,288 blocks because its VDISks are defined in the CP
directory
FB-512V-DISK 524288
User2 has MDISK 700 FB-512V-DISK 524288
User3 has MDISK 700 FB-512V-DISK 131072
How are they shared?
Currently, they are not shared all...there are three separate vdisks
defined, one for each guest USER1, USER2, and USER3.
To share, say, USER1's vdisk
On 4/29/09 10:28 AM, Bob Bates robert.ba...@wellsfargo.com wrote:
They are not because each is defined separately. From User2 try LINK User1 700
701 RR and see what that gets you.
Just like all the users having 191, that doesn't mean they are shared with one
another.
Although you should
-594-7474
-Original Message-
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On Behalf
Of David Boyes
Sent: Wednesday, April 29, 2009 12:21 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Nedd some help undersdtanding vdisk
On 4/29/09 10:28 AM, Bob Bates robert.ba
Hi
I forget, how much VDISK total is allowed for a Linux guest?
Thank You,
Terry Martin
Lockheed Martin - Information Technology
z/OS z/VM Systems - Performance and Tuning
Cell - 443 632-4191
Work - 410 786-0386
terry.ma...@cms.hhs.gov
Telecommuting on Fridays - Use my cell
Check your System Configuration file or issue these Class B commands:
QueryVDISK userlim
QueryVDISK syslim
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On
Behalf Of Martin, Terry R. (LOCKHEED MARTIN Performance Engineering
On Fri, Mar 13, 2009 at 3:52 PM, James Stracka (DHL US)
james.stra...@dhl.com wrote:
Query VDISK userlim
A helpful trick in this area is that the VDISK defined in the
directory is not subject to the defined User Limit. So you can give
some servers a large VDISK but still not allow everyone
: Re: Total VDISK space allowed
On Fri, Mar 13, 2009 at 3:52 PM, James Stracka (DHL US)
james.stra...@dhl.com wrote:
Query VDISK userlim
A helpful trick in this area is that the VDISK defined in the
directory is not subject to the defined User Limit. So you can give
some servers a large VDISK
Also, Q VDISK will show all of the allocated V-disks so you can see who is
using Vdisk and how much they are using.
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: Friday, March
(REUSE
will let you use VDISK defined in the directory, if you weren't
already aware of that parameter.
Adam
terry.mar...@cms.hhs.gov
Telecommuting on Fridays - use my cell phone
-Original Message-
From: The IBM z/VM Operating System [mailto:ib...@listserv.uark.edu] On
Behalf Of Adam Thornton
Sent: Friday, March 13, 2009 12:30 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Total VDISK space allowed
that you can use it to format VDISKS specified in the
directory.
For instance, if you had a VDISK at 160 defined in your directory, you
could do
SWAPGEN 160 nblocks ( REUSE
Where nblocks is however many blocks.
(The next version probably should figure out how big the device is and
default
I know this is not what you are asking, but did you guys also change the
sysconfig vdisk syslim and userlim to infinite ?
just wondering
thanks,
Augie
Adam Thornton
Hi Adam,
Thanks for the information. What advantage does defining the VDISK in
the directory and using SWAPGEN in the PROFILE with REUSE over not
defining them in the directory and just doing the SWAPGEN in the profile
without REUSE? Just trying to make sure I understand this!
Thank You,
Terry
. (LOCKHEED MARTIN Performance Engineering/CTR) (CTR) wrote:
Hi Adam,
Thanks for the information. What advantage does defining the VDISK in
the directory and using SWAPGEN in the PROFILE with REUSE over not
defining them in the directory and just doing the SWAPGEN in the profile
without REUSE? Just
What advantage does defining the VDISK in
the directory and using SWAPGEN in the PROFILE with REUSE over not
defining them in the directory and just doing the SWAPGEN in the profile
without REUSE?
And... as Rob van der Heij mentioned in an earlier post:
---snip---
A helpful trick
is
required for whatever reason.
Martin, Terry R. (LOCKHEED MARTIN Performance Engineering/CTR) (CTR)
wrote:
Hi Adam,
Thanks for the information. What advantage does defining the VDISK in
the directory and using SWAPGEN in the PROFILE with REUSE over not
defining them in the directory and just
On Tue, 23 Dec 2008 14:39:43 -0800, Schuh, Richard rsc...@visa.com wrot
e:
In looking at the VDISK Storage by User display (ESALPS) I noticed that
SYSTEM was the 10th largest user of VDISK during one interval, but fell
to 0 the next. What causes SYSTEM to show up as a user of VDISK? Perhaps
way to clean up a machine by many of the
guests.
Regards,
Richard Schuh
-Original Message-
From: The IBM z/VM Operating System
[mailto:ib...@listserv.uark.edu] On Behalf Of Bill Holder
Sent: Monday, January 05, 2009 1:27 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: VDISK
In looking at the VDISK Storage by User display (ESALPS) I noticed that
SYSTEM was the 10th largest user of VDISK during one interval, but fell
to 0 the next. What causes SYSTEM to show up as a user of VDISK? Perhaps
something in the DEFINE or DETACH processes?
Regards,
Richard Schuh
SYSTEM as displayed by ESALPS components is not system as in SYSTEM VMDBLK. System is
really system totals. Which screen exactly are you looking at? (There isn't a vdisk
storage by user display).
The ESAASPC shows all the address spaces including VDISK, and shows 'SYSTEM'. The ESAVDSK
just
, December 23, 2008 3:57 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: VDISK
SYSTEM as displayed by ESALPS components is not system as
in SYSTEM VMDBLK. System is really system totals. Which
screen exactly are you looking at? (There isn't a vdisk
storage by user display).
The ESAASPC shows all
Are blocks of VDISK used anywhere in the CP Monitor Data?
Marcy Cortes
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, disclose, or take any action based on
this message
Used or reported? Try the ESAVDSK Vdisk Analysis report.
Regards,
Richard Schuh
-Original Message-
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Marcy Cortes
Sent: Monday, December 10, 2007 2:34 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: VDISK blocks used
I forgot to mention, ESAVDSK is under the Main Storage heading.
Regards,
Richard Schuh
-Original Message-
From: The IBM z/VM Operating System [mailto:[EMAIL PROTECTED] On
Behalf Of Marcy Cortes
Sent: Monday, December 10, 2007 2:34 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: VDISK blocks
cc
System
[EMAIL PROTECTED] Subject
ARK.EDU VDISK blocks used in CP Monitor
] Subject
ARK.EDU VDISK blocks used in CP Monitor
Data?
12/10/2007 04:34
Of Mark Post
Sent: Monday, December 03, 2007 5:29 PM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Is 275GB of VDISK stupid?
On Mon, Dec 3, 2007 at 1:05 PM, in message
[EMAIL PROTECTED]
l.nyenet,
Romanowski, John (OFT) [EMAIL PROTECTED] wrote:
Rob said earlier that after linux starts using
On Tue, Dec 4, 2007 at 9:15 AM, in message
[EMAIL PROTECTED],
Mrohs, Ray [EMAIL PROTECTED] wrote:
Hi,
Here's a current swap status on SLES10 with 400M.
swapon -s
FilenameTypeSizeUsed
Priority
/dev/dasdf1
On Dec 3, 2007 7:13 AM, Leland Lucius [EMAIL PROTECTED] wrote:
But, I like a little excitement every so often, so I got this crazy idea to
replace all secondary swap with VDISK and just boost up the VM paging
volumes.
That seems like a good idea to me. But what else can I say, since we
have
It seems hasty to say that Because of the Linux algorithm for using
swap, a VDISK used for swap even a little will eventually be used
completely.
That's the same as saying a linux swap area used even a little will
eventually be used completely. Why would linux do that? That's not
what my SLES9
On Dec 3, 2007 2:43 PM, Romanowski, John (OFT)
[EMAIL PROTECTED] wrote:
It seems hasty to say that Because of the Linux algorithm for using
swap, a VDISK used for swap even a little will eventually be used
completely.
That's the same as saying a linux swap area used even a little
On 12/3/07 2:55 AM, Rob van der Heij [EMAIL PROTECTED]
wrote:
Because of the Linux algorithm for using swap, a VDISK used for swap
even a little will eventually be used completely.
I realize that VDISK is special in the world of Linux, but why doesn't
someone give us the option of preventing
Lucius
Sent: Monday, December 03, 2007 10:26 AM
To: IBMVM@LISTSERV.UARK.EDU
Subject: Re: Is 275GB of VDISK stupid?
On 12/3/07 2:55 AM, Rob van der Heij [EMAIL PROTECTED]
wrote:
Because of the Linux algorithm for using swap, a VDISK used for swap
even a little will eventually be used completely
On Dec 3, 2007 4:25 PM, Leland Lucius [EMAIL PROTECTED] wrote:
I realize that VDISK is special in the world of Linux, but why doesn't
someone give us the option of preventing this? Looks to me like adding one
line in swapfile.c would allow pages to cluster at the beginning of a disk
instead
On Dec 3, 2007 4:51 PM, Romanowski, John (OFT)
[EMAIL PROTECTED] wrote:
Leland,
If you're looking at code for that swapping algorithm:
what happens when highest priority swap area (swap1) gets to the end,
swap1 has free slots and the next higher priority swap area (swap2) has
free clusters?
Rob said earlier that after linux starts using a lower priority swap
area it doesn't migrate back from swap2 to swap1 when stuff is freed
later.
So do you find after swapoff/on a high priority VDISK that linux starts
using it? or does it ignore it and keep filling the dasd swap
On Mon, 3 Dec 2007 08:43:45 -0500, Romanowski, John (OFT)
[EMAIL PROTECTED] wrote:
Now that the swap topic's open again:
What is the basis for advising z/VM VDISK users to have a hierarchy of
multiple linux swap areas of increasing sizes? Are there feature(s) of
the swapping algorithm
, Romanowski, John (OFT)
[EMAIL PROTECTED] wrote:
Rob said earlier that after linux starts using a lower priority swap
area it doesn't migrate back from swap2 to swap1 when stuff is freed
later.
So do you find after swapoff/on a high priority VDISK that linux starts
using it? or does it ignore it and keep
Leland Lucius wrote:
It sounds like a good idea and since Linux is open source, I suspect
that if you wrote it, Leland, we might use it.
Jim
I realize that VDISK is special in the world of Linux, but why doesn't
someone give us the option of preventing this? Looks to me like adding one
line
On 12/3/07 12:15 PM, Jim Bohnsack [EMAIL PROTECTED] wrote:
Leland Lucius wrote:
It sounds like a good idea and since Linux is open source, I suspect
that if you wrote it, Leland, we might use it.
The option would have to be on a per device basis since we'd still want
normal disk to use the
time for the swapoff to complete (while Linux swaps
pages back in). Once you've done this, you could vary the disk
offline, detach it, and get a new VDISK from VM (and thus let VM free
up all those pages). I've actually done this automagically with a
workload that was predictable, but I'm not sure it's
up, then swap2 starts being used. If pages
on swap1 get freed up, the pages that were written to swap2 will never be
migrated to swap1, even if if they are paged in by Linux and then paged out
again.
So do you find after swapoff/on a high priority VDISK that linux starts
using it? or does
On Mon, Dec 3, 2007 at 1:43 PM, in message
[EMAIL PROTECTED], Leland Lucius [EMAIL PROTECTED]
wrote:
On 12/3/07 12:15 PM, Jim Bohnsack [EMAIL PROTECTED] wrote:
Leland Lucius wrote:
It sounds like a good idea and since Linux is open source, I suspect
that if you wrote it, Leland, we might
swap with VDISK and just boost up the VM paging
volumes.
We don't actually hit Linux swap all that much so probably 15% or so of that
275GB is ever really in use. (Yes, I know...we're probably oversizing our
guests, but that's a different story.)
I know I'd have go boost up the number of paging
Is this funny or what!I just brought up zVM 5.3 from 5.1Defining a Vdisk as
follows fails:CP DEFINE VFB-512 AS 0153 BLK 20and I getHCPLNM091E DASD
0153 not defined; vdisk space not availableBut CP DEFINE VFB-512 AS 0153 BLK
19does not fail. My user Vdisk limit was 75 blocks
Look for this entry in SYSTEM CONFIG
Vdisk Userlim 144000 blocks /* Maximum vdisk allowed per user */
Rick
Richard R. Bourgeois
Virtual Software Systems, Inc.
7715 Browns Bridge Rd
Gainesville, GA 30506
770-781-3200
[EMAIL PROTECTED]
_
From: The IBM z/VM Operating
Sorry I didnt see the whole note because it was in a preview window. What
do you see when you query the limits?
q vdisk syslim
VDISK SYSTEM LIMIT IS 10817616 BLK, 55000 BLK IN USE
Ready; T=0.01/0.01 23:43:57
I'm scratching my head here.What am I missing??
q vdisk syslim
VDISK SYSTEM LIMIT IS INFINITE,18925 BLK IN USE
Ready; T=0.01/0.01 22:24:53
q vdisk userlim
Never mind.
I found the maximum a single disk may be is 4194296 .
Less than helpful error message - vdisk space certainly is available!
Marcy Cortes
This message may contain confidential and/or privileged information. If
you are not the addressee or authorized to receive
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