there being several I badly want to. z/OS performance is
where I make my income - z/VM is a side interest; and unfortunately not a
very large one here in Aus
Would like to help, but can't.
Shane ...
On Sat, Jun 15th, 2013 at 8:47 AM, I wrote:
Ugh - now I remember why the various streams have so much
I was never much enamoured with the original cpuplugd - and my customer
response to testing it was less than enthusiastic. This, however, looks more
interesting.
Now to see if I can convince the customer to retest using it (R/H 6.4).
Shane ...
On Fri, Jun 28th, 2013 at 1:12 AM, Bruce Hayden
to in this stream, I'll be in touch.
Shane ...
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And just for completeness, I have a customer happily running 5.4 on a z114.
I would go for 6.2 on the new box, but you'd have to think IBM would cane you
something awful with licensing for running z/OS as guests.
Needs must I suppose ...
Shane ...
On Tue, May 28th, 2013 at 8:09 PM, Feller, Paul
I'm sure this will induce Philipp Kern to rise to the task.
However a quick search on this list will also get you Fedora - that might
suffice for educational purposes. Especially if you are RHEL inclined.
CentOS used to do a s390x build, but I haven't seen that in years.
Shane ...
On Fri, May
On Fri, May 10th, 2013 at 2:32 AM, David Boyes wrote:
You're probably not going to budge them on that.
With luck maybe Filipe can bring some more clout to the table ;-)
Shane ...
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On Thu, Mar 21st, 2013 at 4:02 AM, Ben Duncan wrote:
*SNARK* .. Gave up Java for Python.
lol - I went the other way. No real loss in my case as my Python was
rudimentary, and I wanted to write an app for my phone
Now everyone tells me I should be on HTML5 d'oh.
Shane
.
Interesting timing. I was about to suggest you utilize your perl skills.
Having originally ignored it, I now use awk extensively for text
parsing/reduction. But for *BIG* jobs, perl is it.
But all that input I/O is going to be death whatever you choose.
Shane
I've had no trouble reading your mails from a (linux) mail client or a web
interface to my ISP mail q.
Using a web interface to linux-390, your messages disappear, leaving just
attachments.
Shane ...
On Tue, Jan 29th, 2013 at 2:59 AM, Richard Troth wrote:
friends --
Sincere apologies
up against the rest of
us.)
Hmm - maybe a little harsh on grub.
We all have to tolerate the unreasonable demands of monopolistic
multinational conglomerates.
Probably every day for most of the people on this list.
Shane
are guaranteed to get a spot near the front ;-)
So if you're going, think about it.
And no Brian, I won't be there ... sorry.
Shane ...
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There is a thread on another list re why I love my z vendors.
Clear evidence here.
Excellent, pure and simple.
Shane ...
On Tue, Dec 4th, 2012 at 6:34 PM, Dan Horák wrote:
yes, I've checked the sources for dracut (the tool that downloads the
image after setting the needed devices online
Mark Post (from Suse) spake thus:
RHEL ships with tigervnc (the client) and tigervnc-server. Is there some
problem with those?
Who says they don't keep an eye on their contemporaries ... :0)
Keep up the good work, one and all.
Shane
Might explain the quality of the doco - kudos as appropriate.
Shane ...
On Sat, Sep 1st, 2012 at 10:07 PM, Thang Pham wrote:
As of July 13, 2012, a service contract for xCAT on z/VM is available for
purchase from IBM. More info is available on
http://www.vm.ibm.com/sysman
As per the document one can modify the the syslog-ng.conf file to supress
the messages.
React to the symptom (and hide the evidence) rather than fix the actual problem.
Has happened before, will do again.
Shane
On Sat, Sep 1st, 2012 at 1:17 AM, Lee Stewart wrote:
Is anyone using xcat (http://xcat.sourceforge.net/) in production? Any
comments on it?
Nope, but thanks for asking the question. Looks interesting.
My only comment would be that the z{VM,Linux} doco looks extremely well done.
Shane
And ... ?.
http://gigaom.com/cloud/some-of-amazon-web-services-are-down-again/
Shane ...
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Shane ...
On Sat, Aug 18th, 2012 at 6:15 AM, Morris, Kevin J. (RET-DAY) wrote:
Has anyone on this list experimented with Collectl and its accompanying
utilities?
http://collectl.sourceforge.net/
http://collectl-utils.sourceforge.net/
For those without access to Velocity Software, this may
appears to the watching masses to be the promising child that
just never lived up to expectations.
Shane ...
(Tony, can you change your reply to pls)
On Wed, Aug 1st, 2012 at 8:48 AM, Tony Saul wrote:
I'm probably just jealous and frustrated when I see success stories as I
have been bashing my
On Tue, Jul 17th, 2012 at 6:37 AM, Alan Altmark wrote:
...
TCPIP is connected to two HiperSocket networks: one real (to MVS) and one
virtual (to Linux).
Now, hold it right there fella. I want the order number for one of those
*real* hipersockets.
(haven't we been here before ... ;-)
Shane
remains to be seen.
Shane ...
On Thu, May 3rd, 2012 at 2:48 PM, Srivastava, Sagarwrote:
...
Standard
Linux commands like top could not show the process since it ran for 10
seconds per minute only.
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holes in it.
Shane ...
On Sat, Apr 21st, 2012 at 6:28 PM, R P Herrold wrote:
Not just a hint -- the Red Hat kernel configuration appears
not to enable it -- but it may be trivially turned on:
# echo 1 /sys/module/printk/parameters/printk_time
On Fri, Apr 13th, 2012 at 3:41 PM, Mark Post wrote:
/proc/*/smaps exists in SLES10, but there's no Swap: fields in them.
Arrgggh. That'll certainly get a bunch of zeroes out of that script.
Note to self, _never_ presume nuthin ...
Thanks Mark.
mentioned, there is de-dup and compressed swap cache
out in the wild already. How does the mug end user figure out what's what ?.
Shane ...
On Thu, Apr 12th, 2012 at 5:56 PM, Rob van der Heij rvdh...@gmail.com wrote:
... (assume Shane hints at that with lazy
allocation is zero ?.
Hopefully one of the bright folks in the German labs will come to our aid
whilst I sleep ... ;-)
Shane ...
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with
(extreme) care if you are basing decisions on it.
- the definitive way to check is swapoff/swapon. Bit drastic maybe, but the
swapoff will simply fail if there is insufficient memory available. Works
o.k. on test environments ...
Shane ...
On Thu, Apr 12th, 2012 at 12:09 PM, PHILIP TULLY wrote:
I have
useful metrics upstream, and merely make z/VM
a generic hipervisor so users can concentrate on the things that earn them a
buck.
Or just toss it all in and get the z KVM module up to spec.
/heresy
Shane ...
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Sorry Alan - I trust your paroxysm of coughing did no lasting damage ;-)
I meant the concept, not necessarily that precise implementation.
Shane ...
On Sat, Apr 7th, 2012 at 3:22 AM, Alan Altmark wrote:
(cough) With VIF, we learned an important lesson on how NOT to make a
hypervisor
And is already linked off the sourceforge page. Excellent work !.
Shane ...
On Wed, Mar 21st, 2012 at 9:25 PM, Dorothea Matthaeus wrote:
The Linux Health Checker User's Guide will soon be available also on
developerWorks
C'mon Mark, be a bit more positive lol.
Let's hope Barbara doesn't get to hear of this (*) ... ;-)
Shane ...
(*) - apologies to those not on IBM-MAIN
On Thu, Mar 22nd, 2012 at 2:25 AM, Mark Post wrote:
I'm more interested in a mechanism to report bugs. From perusing the
SourceForge
a subset of the devices has been trashed, just getting LVM back
to a usable state can be a devil of a job. Without (decent) backups any
overwritten data is gone.
Shane ...
On Tue, Mar 20th, 2012 at 8:42 AM, Helio Mario Neves Pimentel de Oliveira wrote:
I don´t how far the formatting exec went
is not a partition, but a
volume, which makes the vg a group of ... never mind :eek:.
Overloaded acronyms are always lots of fun.
Shane ...
On Thu, Mar 15th, 2012 at 9:11 AM, Tom Duerbusch wrote:
Just have to know the secret handshake and all is well G
services.
Linus (as is his want) has also reacted (er, ranted) about this anti-social
behaviour.
Some days it is just a whole lota fun being amongst the spectators.
Shane ...
On Mon, Feb 27th, 2012 at 11:10 AM, Rodger Donaldson wrote:
Given Oracle's own support matrix says they officially support
I must admit some ambivalence to being hamstrung by such standards.
I did enjoy having a read of this:
http://lists.busybox.net/pipermail/busybox/2010-December/074114.html
Shane ...
...
The default in /opt/IBM is not a great option.
Per the FHS, I believe it should have been (should
network ...
Keeping an eye on /proc/interrupts might be instructive.
Shane ...
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and recovered.
Note also the caveats in the manpage.
Shane ...
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only want the filenames use -q as well.
In need delete the Only in ... lines with something like sed or awk.
Shane ...
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could co-ordinate these things ;-)
Shane ...
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to remind him of the
time he was accused of being a (security) weebie (which I just had to look
up to assuage my ignorance).
:-)
Shane ...
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needs to work, you wait.
Shane ...
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they didn't mark it as crap I suppose (see
https://lkml.org/lkml/2011/10/6/317)
Shane ...
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in a tainted kernel ?.
Shane ...
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other benefits as
David alludes.
Shane ...
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On Wed, 12 Oct 2011 11:03:16 -0400 Jim Elliott wrote:
Shane: The z/VM 6.2 stuff went live on the www.vm.ibm.com at 10:00AM
ET today. The rest of the System z updates went live earlier in the
day.
Thanks Jim et al, I actually found the under construction page for
6.2 just after I posted
On Tue, 11 Oct 2011 08:35:18 +1300 Rodger Donaldson wrote:
... it's probably a Java problem.
*probably* - did you say probably ...
ROTFLMAO.
Shane ...
(BTW, just noticed, you need to change your Reply to ..)
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On Wed, 5 Oct 2011 23:24:24 -0600 Mark Post wrote:
It is still needed on SLES10 systems, which is what the OP was
running.
In which case I apologise for being misleading.
Shane ...
exits stage left biting tongue
) digress.
Shane ...
On Wed, 5 Oct 2011 23:31:35 + Davis, Scott wrote:
No, LV shows the space. When I use ext2online
dmesg shows -- JBD: ext2online wants too many credits (1034
1024) Google results say it's a bug. I will use resize2fs
un-mounted
Holdings maybe ... ?
Redhat ... ?
Ubuntu ... ?
Sorry, the times of innocence have passed.
Shane ...
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, then later 100 ?.
This is just a terrible metric to base decisions on.
A re-boot is required to clear a situation like the above - and it
happens.
Shane ...
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...
Almost as meaningless is %wa.
Shane ...
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Windoze provides help cmd for a subset of commands. If that fails
try cmd /?. Should work for dir.
I can't count the number of times I've used ls (out of habit) on
Windoze systems :(
Shane ...
On Mon, 26 Sep 2011 17:53:45 -0400 Eddie Chen wrote:
I need a recursive list of sub
*. This is hipervisor
responsibility.
Maybe if/when live guest relocation makes it out the door, such
features will suddenly become worthwhile investing developer time in.
Shane ...
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Have you considered alternatives - pax for example ?.
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, versus what you think
you're seeing. I might be inclined to reduce the clutter in the
offered solution; say -o pid,pcpu,comm.
I also wonder how many shops habitually run top with -d 10 - might
ameliorate the perceived cost of running it.
Shane
filesystems - have a read of the
following for a reasonable overview.
http://kernelnewbies.org/Ext4
Shane ...
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of a swap extent, pvcreate
recognises the swap header and will query you before trashing it.
Any other partition type - including those with valid filesystems and data -
will be fair game.
Shane ...
(N.B. - not (re-)verified on z
have elicited little (no) sympathy for
including controls for specific memory controls.
Perhaps Allan Cox will pass by again and offer an opinion.
Shane ...
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rubs me the
wrong way.
Shane ...
Just an fyi for anyone interested in cmsfs.
cmsfs-fuse is a new feature included in RHEL 6.1 (released last week)
which allows write access to a CMS filesystem. For example, it's now
possible to edit files on a guest's 191 disk with a Linux text editor
... which allows write access to a CMS filesystem.
Note the *write* access - is this generally available ?.
Shane ...
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Hard to argue ... lol
Shane ...
On Fri, Apr 1st, 2011 at 10:15 PM, Mauro Souza wrote:
But anything is better than twm.
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And which real address 0 might that be ?.
Remembering that most people will be running as a guest under a hipervisor
(z/VM) running second level under another hipervisor (PR/SM).
I note our German maintainers have been conspicuously quiet
Shane ...
On Thu, Mar 17th, 2011 at 6:32 AM, Mark Post
As Rob pointed out, good luck trying to figure what that actually resolves to
hardware-wise.
Shane ...
On Thu, Mar 17th, 2011 at 8:46 PM, Heiko Carstens wrote:
The kernel gets loaded to address absolute zero ...
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And another good thread was had by all.
Whilst I suspect the initial question was in no way related to the problem
observed, the asking elucidated some fine information on the zSeries port for
those of us with a morbid fascination in such matters.
Thanks to all.
Shane
I've been known to drop files in /tmp for later collection - by myself or
others.
Have you considered skulker ?.
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Just to clarify, this was based on the OE reference - i.e Unix Systems
Services running under z/OS rather than zLinux.
Shane ...
On Sat, Mar 12th, 2011 at 1:44 AM, I wrote:
Have you considered skulker ?.
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chill.
Chewing up all the (guest) memory, then doing likewise to the z/VM memory
(extended included) can't be good. Especially if it all finally goes base
over apex as the OP indicated.
Swap is generally cheap - outages are expensive ...
As are the arse-kicking episodes afterwards.
Shane
have to shout down
Solaris/ZFS bigots), but it ain't ready for prod yet.
Close tho' ...
Shane ...
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You wish
You'll find them scattered hither and yon - especiallly with LVM faking
a(nother) block device layer.
And, as you've already discovered, the second U is a lie. Sometimes ...
Shane ...
On Wed, Feb 2nd, 2011 at 10:48 AM, Alan Altmark wrote:
Ah, so these UUIDs are not the builtin
And as a dispassionate (database ignorant) observer, I'm happy to see such a
response from a vendor.
Top points.
Shane ...
On Wed, Dec 22nd, 2010 at 10:17 PM, Damian Gallagher wrote:
The Oracle DBA indicates that Oracle is easier to implement under Red
Hat - I'm interested in what
the availability of a monitor
product of some sort on z/VM.
Shane ...
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, cut - even the
echo could probably go if you get a little creative.
Each to their own.
Shane ...
On Wed, 8 Dec 2010 17:21:53 -0500
Bauer, Bobby wrote:
Thanks but since I'm not familiar with perl I'll stick with awk. I'll
look at skipping the grep stage
.
Fedora is a PITA - you have to assign specific (i.e. non-random) ports,
then open them up. All too much trouble - what the hell is the package
manager (*not*) doing during the install ?.
Back to your regular programming ...
Shane ...
On Sun, 5 Dec 2010 22:40:39 -0500
Alan Altmark wrote
watching the (cricket) test over the weekend I might try
an install at home.
Shane ...
On Fri, 26 Nov 2010 10:14:40
+1100 Bern VK2KAD vk2...@hotmail.com wrote:
Has anyone been able to install RHEL6 under Hercules ??? - I could
use some help.
I have been able to IPL from the card reader but I
)
sleeps in your scripts.
Shane ...
On Tue, 23 Nov 2010 10:51:53 +0100
Sebastian Ott wrote:
2. Problem:
Because I lack the FLASHCOPY function I use for disk to disk copy
dd.
dd bs=4096 if=/dev/dasdx of=/dev/dasdy
In principle it works ok. But when I do a chccwdev -d 0.0. even
- like USER
DIRECT- I reckon can (and should) be reflected back to the guest, and
implemented *at that IPL*.
Obviously I'm out in left field on this, but I'll keep Alans
pronouncement to logout in such cases in mind in future.
Thanks again ... Shane
On Fri, 5 Nov 2010 10:15:08 -0400
Alan Altmark
, but it ain't
in your face obvious.
Shane ...
On Thu, 4 Nov 2010 20:56:53 -0400
Alan Altmark wrote:
... you will want to LOGOFF the guest and LOGON again to pick up
the directory changes. IPL of a guest is not sufficient to pick up a
directory change
Decided I should finally have a look at this.
Performance is (remarkedly) acceptable on my 1.7 GHz Pentium M
(sub-)laptop. Takes a while to fire up, but that's o.k.
Isn't your average build of course ... ;0)
Shane ...
On Tue, 28 Sep 2010 17:14:23 +0200
Karsten Hopp wrote:
Hercules images
Thanks Heiko, much appreciated.
Shane ...
On Wed, 6 Oct 2010 10:24:00 +0200
Heiko Carstens wrote:
Or in other words: Linux is not aware if memory is local or remote.
However the cpu topology is known (that is: which cpu belongs to which
book) and the Linux kernel makes use
inotify rather than
polling.
Shane ...
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Who is this Altmark fella anyway ?.
Shane g,d,r
On Thu, Sep 9th, 2010 at 10:24 PM, Alan Altmark wrote:
...
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thus), I query the
assertion re ext3. Were it to be mounted r/o everywhere, I fail to see
how the filesystem could have meta-data that would need replaying.
But I admit to not having specifically tested that - maybe someday.
Shane
Any comments from this august assemblage ?.
I suppose David has more reason than most to feel umbrage.
I kept wanting to get involved (non-z), but didn't see the effort being
rewarded long-term. Even the devs that were at the kernel conference I
was on when the acquisition was (formally)
A lot more functionality is ascribed to swappiness than it deserves.
I'd be thinking this is more an issue in the buddy allocator. The slub
allocator is much better at handling things in more recent kernels.
Should be the default IMHO.
Shane ...
On Thu, 2010-08-05 at 11:38 -0600, Mark Post wrote
agree with the sentiment that it should be lower
in a z/ environment.
Getting up to date on the kernel would also be a good idea as Mark
suggested - lots of reports on late 2.5 and early 2.6 kernels.
Shane ...
(interestingly I don't see this post on the maillist archive)
Linux on 390 Port LINUX
.
Shane ...
Please join us for the Linux webcast on
Wednesday, July 28th that is offered twice
this day: 9:00 AM EDT OR 2:00 PM EDT.
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if it did have the data. Set up a
background script to
run top and vmstat and write to disk every so often. A quick bit of awk should
show the
trend. You could do all the probing of /proc yourself, but I find it easier to
allow things like
top/ps/vmstat do all the grunt work.
Shane
Short answer, no.
This was discussed earlier in the year - see:
http://www.mail-archive.com/linux-390@vm.marist.edu/msg55911.html
Shane ...
On Tue, Jul 27th, 2010 at 1:17 AM, Marcy Cortes wrote:
Is there a way to limit the amount of memory used for page cache
Some more info please.
... you get a OOM condition ?.
... the/a large consumer gets killed ?
... the system halts (explain) ?.
You *want* a system-wide panic ?. If so, setting /proc/sys/vm/panic_on_oom to
1 will
have the desired effect on non zLinux.
Shane ...
On Tue, Jul 27th, 2010 at 1:24
up
in kpagecount, and tally up the number of pages that are only referenced
once.
/quote
I have seen some user-space code to do all this - must move the testing of
this up my to-do list.
Shane ...
On Sat, Jul 24th, 2010 at 4:45 AM, Mrohs, Ray ray.mr...@usdoj.gov wrote:
Start up all your Linux
pages, and so can affect the pool of available page frames.
Determining this number is not simple. Recently the memory manager has
started using compressed page cache to ameliorate this effect somewhat.
Refer to my previous (flippant) comment.
Shane ...
On Sat, Jul 24th, 2010 at 8:05 AM, Tom
Sorry ... that should be compressed _swap_ cache
Shane ...
On Sat, Jul 24th, 2010 at 9:00 AM, I wrote:
... Recently the memory manager has
started using compressed page cache to ameliorate this effect somewhat.
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On Sat, Jul 24th, 2010 at 10:20 AM, Marcy Cortes wrote:
Does this imply that the best setting for Linux on z is to use the FILE
SYSTEM CACHING (Direct i/o disabled)?
I won't presume to be able to answer that, but I will observe that Linus has
made some very harsh comments about database
Barton yanking Alans chain ...
Where have I seen that before ?.
Shane ...
On Fri, Jul 23rd, 2010 at 5:26 AM, Barton Robinson wrote:
Alan, are you trying to make this announcement so totally boring on
purpose? Just business as usual? nothing really new and exciting? Is
there anything here
All the bits are now to be OSA connected.
Shane ...
On Fri, Jul 23rd, 2010 at 8:40 AM, Mark Post wrote:
I didn't see any mention of an IP network, just that it was private.
That could mean a lot of things.
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to be created.
Didn't test tar as it wasn't relevant (to me) at that juncture.
Shane
On Thu, Jul 22nd, 2010 at 3:06 AM, Edmund R. MacKenty wrote:
Rick pointed out that rsync and tar have options that deal with sparse
files intelligently: when they copy a sparse file, they do not write out
blocks
Seems Jim couldn't keep the lid on things.
The IBM Canada home page is all dressed up with nowhere to go ... :0)
Shane ...
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onto a mod3.
Shane ...
On Sat, Jul 10th, 2010 at 7:26 AM, Tom Duerbusch wrote:
Sooo
Would a 2 GB LPAR, create a disk based swap file of 1 GB off of my
(in this case) 3390-3 disk? Not much space left to install Linux..
The novice installer that you are trying to help, then either
Maybe - but a hacker wouldn't.
But I'll bet he keeps his trap shut in future.
Shane ...
On Wed, Jun 9th, 2010 at 11:38 PM, Mrohs, Ray wrote:
What we really just saw is another young person being turned away
from z/VM, at a time when the next generation needs to be engaged and
involved
Just to be clear, I use hacker in this sense:
http://en.wikipedia.org/wiki/Hacker_(programmer_subculture)
Shane ...
On Wed, Jun 9th, 2010 at 11:56 PM, I wrote:
Maybe - but a hacker wouldn't.
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On Sun, Jun 6th, 2010 at 2:13 AM, Alan Altmark wrote:
... a great candidate for a wiki article. There's even a placeholder just
waiting for you Alan ... :0)
This really is such a can of worms it needs something authoritative out where
people can easily find it.
Shane
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