A good friend of mine used to say that many performance problems
really are expectation problems.
The strengths of zSeries are not in single-engine clock speed but in
massive throughput. It is not trivial to design a benchmark that
demonstrates it. Instead of doing end-to-end benchmarks I prefer
Kielek, Samuel wrote:
Google is sponsoring the ZFS port to Linux, details are here:
http://zfs-on-fuse.blogspot.com/
and here:
http://www.wizy.org/wiki/ZFS_on_FUSE
And GNU/OpenSolaris already has it and info on that distro is here:
http://www.gnusolaris.org
The key word here is FUSE.
(someone wrote)
Realize that MIPS actually means Misleading
Indicator of Processor Speed.
(snip of clock rate comparison)
Clock rate is almost never useful for comparing between
different types of processors, or even different versions
of similar processors. There are many design tradeoffs
Hi People.
Is it possible to make HMC CD-ROM available as an emulated tape for
already running system (Z/OS, Linux, etc..)? As i understand, for Load
from CD-ROM the same feature is used which was/is used in P/390 OMA (if i
remember correctly) driver? There we could use emulated tape at any point
Hi People
We're running SLES 8 on 3 LPARs and SLES 9 on one.We're using FDR/ABR
to do full volume dumps of the data. We just bring down the applications
we're running (Domino) and unmount the volumes and back them up from z/OS
on another LPAR.
But this raises the question: How do we
FDR Upstream does a great job of backing up Domino, and z/Linux (we have
done both, but our Domino is still on windows boxes so I can't claim
experience in the combination). But AFAIK you should be able to reliably
backup Domino and the OS with no outage to either.
The catch (there is always a
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On
Behalf Of Sergey Korzhevsky
Sent: Wednesday, October 25, 2006 5:59 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Make HMC CD-ROM available as a tape
Hi People.
Is it possible to make HMC CD-ROM available as an
This email lists some known regressions in 2.6.19-rc3 compared
to 2.6.18 with patches available.
If you find your name in the Cc header, you are either submitter of one
of the bugs, maintainer of an affectected subsystem or driver, a patch
of you caused a breakage or I'm considering you in any
But this raises the question: How do we backup the operating system?
Can
we take a full volume dump while the system is running (but pretty
much
idle)?
No.
Is this a bad idea?
Very. You will not get a usable backup.
We've beaten this topic pretty hard in the recent past; the list
Yes you can take backups when the OS is running. It depends on what
running is
If the backup is taken when the Linux system is fairly idle.
It is also better the quicker the backup as in flashcopy.
In other words, the less changes happening during the backup, the
better.
In the case of
Yes you can take backups when the OS is running. It depends on what
running is
I don't like depending on exceptions.
In the case of flashcopy, when you IPL the copy, it is no different
then if the system crashed and you IPL'ed then.
I like depending on recovering stuff even less.
Given the differences in licensing (GPL vs. CDDL) I would say that is
very unlikely.
Mark Post
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Mark Perry
Sent: Wednesday, October 25, 2006 5:31 AM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: zLinux
I believe under GPL v3 this is not a problem, but last I checked Linus
and many in the kernel devel community had put the kibosh on that. Of
course Sun could dual license ZFS.. Or, someone with far too much free
time could port OpenSolaris to zSeries... ;)
-Sam
-Original Message-
From:
Careful what you wish for...
Kielek, Samuel wrote:
I believe under GPL v3 this is not a problem, but last I checked Linus
and many in the kernel devel community had put the kibosh on that. Of
course Sun could dual license ZFS.. Or, someone with far too much free
time could port OpenSolaris to
Ohh, do you know something I don't?? Do tell! :)
-Sam
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Rich Smrcina
Sent: Wednesday, October 25, 2006 2:32 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: zLinux experience
Careful what you wish for...
Hi,
On z/VM side i have a DASD volume linked read only. But on linux side i need
to find a way for detecting if that DASD device is in a read only state.
with the following mount command:
mount /mnt/data -o remount,rw
I don't get any errors from de the mount command, and if i check the status
I probably shouldn't... Nothing's been officially announced and I can't
find any reference in the archive (I thought it was previously hinted).
The impression that I got this summer was that it was coming along
very well.
Kielek, Samuel wrote:
Ohh, do you know something I don't?? Do tell! :)
You could use one of the two packages for issuing a CP command, and script it
so that you capture the output of Q V DASD or Q V vaddr. Do this early in the
game.
David
From: Linux on 390 Port on behalf of Eric Gaulin
Sent: Wed 10/25/2006 2:59 PM
To:
I would use the hcp command (from the cpint package), or the vmcp
command to query CP.
Mark Post
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] On Behalf Of
Eric Gaulin
Sent: Wednesday, October 25, 2006 2:59 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Detection of
I want to find the first comment line that begins with a target string
in column 1 (#target) and replace only that first target line with
another string.
There are multiple lines that begin with #target.
I've struck out with sed (not that I know sed).
Any quick hints on a sed or awk or ??
I know this might not be much help, but this is the kind of thing that sed does
not do. I know it can be done with awk, but since I don't know awk I usually
write little C programs to do this kind of thing.
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
This should replace the first target:
sed -e 's/^ #target\(.*\)/another string/' file newfile
Darren
On Wednesday 25 October 2006 14:57, Romanowski, John (OFT) wrote:
I want to find the first comment line that begins with a target string
in column 1 (#target) and replace only that first
$ ed foo EOF
/^#target
c
whatever
.
w
q
EOF
Fargusson.Alan wrote:
I know this might not be much help, but this is the kind of thing that sed does
not do. I know it can be done with awk, but since I don't know awk I usually
write little C programs to do this kind of thing.
On Wednesday 25 October 2006 15:57, Romanowski, John (OFT) wrote:
I want to find the first comment line that begins with a target string
in column 1 (#target) and replace only that first target line with
another string.
There are multiple lines that begin with #target.
I've struck out with sed
John writes:
I want to find the first comment line that begins with a target string
in column 1 (#target) and replace only that first target line with
another string.
There are multiple lines that begin with #target.
I've struck out with sed (not that I know sed).
Any quick hints on a sed
This works for me in GNU sed:
sed '0,/^\#/ c My new line content goes here. Watch out for special
characters.'
Regards,
--Jim--
James S. Tison
Senior Software Engineer
Software Group/EPS Architecture
IBM Corporation
Romanowski, John (OFT) [EMAIL PROTECTED]
Sent by: Linux on 390 Port
Hi all,
Wouldn't be the Linux bogomips a good comparison parameter, since
it comes in all Linux flavors?
Please people, don't get angry with me. I am just raising some
measure units (and understand what that bogomips means anyway ;-)
Regards.
How about sed, awk, head and tail? This is not the prettiest, but seems to
work:
# cat foo
#first first
#second
#third
#first first
#second
#third
# ./replaceFirst first FIRST foo
#FIRST first
#second
#third
#first first
#second
#third
# ./replaceFirst fourth FIRST foo
fourth not found
# cat
That replaces all the lines that start with #target, not just the first one.
-Original Message-
From: Linux on 390 Port [mailto:[EMAIL PROTECTED] Behalf Of
Darren Zamrykut
Sent: Wednesday, October 25, 2006 12:47 PM
To: LINUX-390@VM.MARIST.EDU
Subject: Re: use sed or awk or ?
This should
No. Bogomips seems even less reliable then MIPS ratings. I know that is hard
to believe, but the bogomips measure is affected by things like virtualization,
and various other factors. Virtualization can cause bogomips ratings to vary
from time to time on the same system.
-Original
Just in case you don't have gnu said around:
http://sed.sourceforge.net/grabbag/tutorials/sedfaq.txt
4.11. How do I match only the first occurrence of a pattern?
(1) The general solution is to use GNU sed or ssed, with one of
these range expressions. The first script (print only the
Depends on when you want to check it...
After it's activated, look at /proc/dasd/devices
0.0.0200(ECKD) at ( 94: 0) is dasda : active at blocksize:
4096, 600840 blocks, 2347 MB
0.0.0190(ECKD) at ( 94:24) is dasdg (ro): active at blocksize:
4096, 19260 blocks, 75 MB
Note 190
On Wed, 2006-10-25 at 18:24 -0300, Ulisses Penna wrote:
Wouldn't be the Linux bogomips a good comparison parameter, since
it comes in all Linux flavors?
To compare what? Processors run at different rates depending on what
instructions they are executing. There are cache effects,
On 10/25/06, Post, Mark K [EMAIL PROTECTED] wrote:
I would use the hcp command (from the cpint package), or the vmcp
command to query CP.
Alternatively, you might consider to make the link mode in the
directory M rather than MR so that you just don't get the disk when it
cannot be in write.
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