Archives of linuxvm.org
05/01/2002 - In response to a question about
recommendations for Linux/390 under VM configuration sizing, David Boyes gave
some guidelines that he uses. He talked about the amount of real and expanded
storage he thinks is needed for VM, as well as the amount of paging volumes.
He also covers Linux/390 guest sizes. There are too many good items to
include here, so you really should read his complete post in the archives.
05/01/2002 - Neale Ferguson posted the URL of
the IBM announcement about the new "turbo" models of the z900. He
also commented "The FCP stuff is quite interesting."
05/01/2002 - A question about converting ASCII text files to PDF drew several reponses. Harry Williams recommended using txt2pdf, which is Perl-based shareware. Alan Cox suggested using the mpage command in conjunction with ps2pdf from the ghostview package:
cat /etc/hosts | mpage -1 | ps2pdf - - > hosts.pdfAlan also commented "For viewing pdf files multiple viewers exist - eg xpdf and gv. If you are outputting to a web page then you simply need the mime type correct and the web browser will fire up the relevant plug-in or helper."
05/02/2002 - Mark Post reported that IBM's
DeveloperWorks site had a number of new Linux tutorials. "They're intended
to help people prepare for the Linux Professional Institute (LPI) 101 and 102
certification exams, but that means that they cover exactly the kinds of
things that every Linux system administrator ought to know. I took a quick
look at the first two, and they seem to be pretty good. They start out
with the basics (experienced people will be able to skip past these parts)
and move into more in-depth topics. You will need to 'register' (no charge)
to get access, if you haven't already. You can either view the tutorial
online, or there are buttons on the top right of the page to download the
files in various formats:
05/02/2002 - Mark Post reported an InfoWorld
article that said OpenOffice 1.0 was now GA. It also said that StarOffice 6.0
would not be free, as StarOffice 5.2 was, but would cost "under $100.00."
05/02/2002 - In response to a request for a list of
VM's DIAG codes, Rob van der Heij pointed to IBM's "CP Programming Services"
manual. Chapter 2 lists all of them. The hcse5a20 was already listed on the links
page, but this one is more current, so it will be replacing the old one.
05/02/2002 - paultz (email@example.com) reported an
Enterprise Systems Journal article on the "resurgence" of mainframes.
05/02/2002 - Mike MacIsaac contributed a HOWTO on
applying patches to a 2.4 kernel.
05/03/2002 - In response to a question about what system configuration files need to be modified when cloning a Red Hat 7.2 Linux/390 system, Tung-Sing Chong replied that he modifies the following files when cloning either Red Hat 7.2, or Turbolinux 6.5 systems:
/etc/modules.conf /etc/sysconfig/network /etc/hosts /etc/sysconfig/network-scripts/ifcfg-iucv0http://www.marist.edu/htbin/wlvtype?LINUX-VM.26787
05/03/2002 - In response to a question about people's
experiences with Intrusion Detection System (IDS) software, Mark Post forwarded a
list of references from one of his colleagues. Craig Kittendorf added that "If
you need high security and have money, check out www.onesecure.com."
05/04/2002 - Jay Maynard of the Hercules project announced that version 2.16.1 is now available. What's new in release 2.16.1:
05/06/2002 - Gordon Wolfe reported that thanks
to Jay Brenneman and Rob van der Heij, his problem with getting command rejects
on a read-only volume was solved. The problem initially presented showed up with
error messages in the system log. The minidisk was linked read only by VM, and
the /etc/fstab entry for the volume specified read only as well. Rob recommended
mounting the volume read only on the creating system before taking it down for
copying. Jay recommended using the (ro) parameter in the kernel parmfile for
the disks that are to be used read only, e.g., dasd=addr1,addr2(ro),addr3-addr4
as documented in the "Device Drivers and Installation Commands" manual.
05/07/2002 - Mark Post forwarded a URL that a
co-worker sent him to the Firewall Builder site. According to the site,
"Firewall Builder consists of an object-oriented GUI and a set of policy
compilers for various firewall platforms. In Firewall Builder, a firewall
policy is a set of rules; each rule consists of abstract objects that represent
real network objects and services (hosts, routers, firewalls, networks, protocols).
Firewall Builder helps users maintain a database of objects and allows policy
editing using simple drag-and-drop operations. Preferences and object databases
are stored in XML format."
05/08/2002 - Werner Puschitz found a META group
analysis of Linux/390. It wasn't very optimistic, to say the least.
05/08/2002 - In another important posting, Gerhard Hiller of IBM reported the following updates to the DeveloperWorks web site:
05/10/2002 - David Boyes posted the URL to a
press release from Legato Systems announcing their "intention to deliver
the industry's most comprehensive information protection and recovery solution
for Linux on IBM eServer zSeries systems." The product is named NetWorker.
David also commented " Perhaps this will motivate our friends at Tivoli to
upgrade the TSM/VM server. Maybe."
05/10/2002 - Alan Cox posted a pointer to a
compiler for an APL derivative named A+. The company that created it, Morgan
Stanley, released it under the GPL, and has Linux/390 packages for it.
05/13/2002 - In response to a question about
any fixes that might be needed to run Linux/390 under VM/ESA 2.3, Robert Matthews
replied that he had installed VM61762, as well as VM62555. He commented
that other fixes needed for Linux/390 support are listed in Info APAR II12444,
which can be found by using IBM's APAR database search page, and that TCP/IP
service is also tracked at the second URL below.
05/13/2002 - During a discussion about various
methods of backup, Vic Cross commented that "In the ISP/ASP Redbook, we
mentioned the idea of using NBD (Network Block Device) and software RAID or
LVM to produce a disk mirroring facility (sort-of a poor man's PPRC)."
Arnaldo Carvalho de Melo replied "This idea was explored long ago by
Marcelo Tosatti, but this has problems with resync after one node goes
offline for some reason, etc, since then we switched to Phillip Reisner's
DRBD, that takes care of the resync case very well."
05/14/2002 - Marcel Foortjes reported an
article that covered the public discussion over a proposed law in the
Peruvian legislature to mandate government use of "free" software,
that is Open Source software. Microsoft's Peruvian General Manager, Juan
Alberto González, had published an open letter condemning the proposed
law. The article prints the full text of Peruvian Congressman David
Villanueva Nuñez's response. The lead-in to the letter states "The
letter provides the most thoughtful and thorough rebuttal we've ever
seen to Microsoft's standard open-source terror boilerplate."
05/15/2002 - Neale Ferguson reported a
ZDNet article that talked about the disparity in predictions of the
future of Linux/390 from Giga Information Group, and META Group. David
Mastrobattista of Giga was quoted as saying Linux/390 has a good future,
META was quoted as saying it will be all but dead in a few years.
05/16/2002 - In response to a request for recommended reading on the Linux kernel, Malcolm Beattie and Neale Ferguson recommended the following:
05/16/2002 - Mark Post forwarded the URL
to an article about Linux, written from the VAR channel perspective. He
commented "It seems to be an advocacy piece, as it's not particularly
balanced, but there's still good information in there." He also noted
that the article mentioned CitiGroup deciding to consolidate its servers on
Linux/390, but didn't remember hearing about that previously. Jim Elliott
gave an alternate URL for the story that has fewer ads and such wrapped
05/16/2002 - In response to a question about
host to transfer LVM volumes from one system to another, Mark Perry pointed
to a section of the Sistina LVM HOWTO page that discusses that task. Mark
Post discovered that the HOWTO is also available in PDF format. The same is
true for GFS.
05/16/2002 - Mark Post reported that IBM's
Linux Software Evaluation Kit had been updated. The SEK is for Intel Linux
only, but is free of charge.
05/16/2002 - Tung-Sing Chong of IBM announced that his Linux/390 cloning demo is now available for free download. This is the demo that is run at just about every industry show where a zSeries machine is shown. "I packaged all the execs, cgi, html, files, etc into a package (VMARC file). This package and the install/setup instructions are now available on my home page... Please read the setup instructions before you proceed to experiment with my demo package."
05/16/2002 - Mark Post reported a Yahoo
article that talked about Reuters moving its financial information software
05/17/2002 - In the process of telling Rudy
de Haas why IBM doesn't publish benchmark information for S/390 hardware,
Jim Elliott of IBM gave the URL to IBM's Large Systems Peformance Reference.
According to the header at the site, "The IBM Large System Performance
Reference (LSPR) ratios represent IBM's assessment of relative processor
capacity in an unconstrained environment for the specific benchmark workloads
and system control programs specified in the tables. Ratios are based on
measurements and analysis. The amount of analysis as compared to measurement
varies with each processor. The data that follows is based solely on IBM's
measurements and analysis of the processors in the tables."
05/17/2002 - Gerhard Hiller of IBM reported the following updates to the DeveloperWorks web site:
05/17/2002 - Jim Elliott of IBM reported
that the SAP application server for Linux for zSeries was now available.
He also commented quot;This is the first 64-bit version of the SAP
application server and runs on the current SuSE SLES for zSeries.
Shipments should start next Tuesday."
05/17/2002 - During a discussion about
consoles and console controllers, Dougie Lawson recommended an IBM
Redbook about the 2074 controller.
05/17/2002 - Dave Jones forwarded the URL
to an article about the uptake of Linux in businesses, and the overall
market for Linux.
05/17/2002 - In response to a question about
whether it was possible to connect a Sun StorEdge 9960 to Linux/390 running on
a z800, Jim Elliott of IBM replied "You really need to ask Sun about this,
05/18/2002 - Neale Ferguson found another article
that talks about Total Cost of Ownership of Linux, featuring Boscov's Department
Stores. Mark Post noted that the write gaffed when he referred to IFLs as software.
05/20/2002 - Scott Ledbetter recommended checking out
the FAQ for the zSeries April 2002 Announcement, which included the Fibre Channel Protocol
05/20/2002 - Jay Maynard of the Hercules project announced that version 2.16.2 is now available. What's new in release 2.16.2:
05/21/2002 - Florian La Roche of Red Hat announced
that a new beta version (post 7.2 GA) was in the rawhide directories on the Red Hat
FTP server. He also commented "Please test and let us know about any
problems left. Please also note that the latest OCO modules from IBM for the Red
Hat Linux kernel 2.4.9-37 contain a special 'ocord.img' which allows installation
of Red Hat Linux via OCO drivers. Details in our docs.
05/21/2002 - Mark Post reported yet another salvo
in the Sun vs. IBM war of words. This one was from Mark Cathcart (again).
05/22/2002 - In response to a request for
recommendations for backup products, Paul Williamson recommended Arkeia.
David Boyes pointed out that it's a good product, but for Intel Linux only,
05/22/2002 - Doug DeMers of UTS Global
announced the availability of UTS's Tape Services Suite for Mainframe Linux.
According to the publicity blurb, TSS is "a comprehensive suite of tape
and tape management service utilities for Linux® on the mainframe. With
the TSS Tape Management Subsystem (TSS-TMS), mainframe Linux® users can
utilize 34x0/3590 tapes with the same levels of simplicity, security and
efficiency enjoyed by OS/390® systems. TSS-TMS handles device allocation,
media access and disposition processing, and fully supports standard tape
label processing, including expiration date handling."
05/22/2002 - Jason McMullan reported a
problem with mprotect() not working on Linux/390 2.4.17. Martin Schwidefsky of
IBM determined that it was a bug "from the very beginning" and was surprised
it hadn't shown up before now. He produced patches for s390 and s390x to
correct the problem and also for 2.4.7 when Neale Ferguson pointed out that
the bug existed there, also.
05/22/2002 - In response to a question about documentation on using RAM disks, Mark Post pointed to the /usr/src/linux/Documentation/ramdisk.txt file in the kernel source tree. Rob van der Heij took a more pragmatic approach and contributed these instructions:
mke2fs /dev/ram0 mkdir /mnt/mini mount /dev/ram0 /mnt/mini
05/23/2002 - In response to a number of people reporting that their web application servers weren't starting after a reboot, Sergey Korzhevsky pointed out that Apache has a parameter to specify how long for the startup script to wait before it checks to see if httpd has started properly, or not. Unfortunately, he didn't say what distribution he was using, but it appears to be SuSE. He said "Look at:
/etc/rc.config.d/apache.rc.config # # timeout during server startup (seconds) # after this time, the start script decides wether the httpd process started without error # increase it if you use mod_ssl and your certificate is passphrase protected # HTTPD_START_TIMEOUT=40I increased this time."
05/23/2002 - Maggie Dunbar discovered an article
talked about Sherwin-Williams deciding to implement Intel Linux in 2,500
of its stores.
05/23/2002 - paultz [firstname.lastname@example.org] reported
and Enterprise Systems Journal article about Sun offering a 10% credit for customers
who "trade in" a mainframe for a Sun enterprise server. "Chris
Kruell, group marketing manager for enterprise systems products at Sun, says
Sun then resells the mainframes or otherwise disposes of the hardware."
Can I get one of those for my house? Or maybe they'll list them on eBay.
05/23/2002 - Jon Doyle reported that the third part
of three in Rudy de Haas/Paul Murphy's series on Linux/390 was now available.
Once again, he was very critical of the platform and IBM, as well as the members of the
mailing list, likening them to a gullible religious cult in one sidebar.
05/24/2002 - Florian La Roche shared the method he
uses when upgrading a system with all the "errata" packages:
rpm -Uvh blah
and try again with
rpm -Fvh *.rpm
"For updating only glibc, you can do rpm -Fvh glibc*.rpm nscd*.rpm and it should also work fine."
05/24/2002 - In response to someone commenting
that they can't install SSH or alternate X Window server on their desktop,
Alan Cox once again demonstrated his voluminous knowledge of available software
when he recommended "If you grab a copy of weirdmind it provides an in
browser ssh and X server without anything being needed but the java in the
web browser. X11 connections are encrypted via the encrypted ssh session."
05/24/2002 - Dennis Musselwhite shared a neat
method of determining if a z/VM 4.2 system has a particular APAR installed or not.
CP LOCATE HCPLANML HCPLANML = xxxxxxxx RESIDENT(to get the host storage address of HCPLANML)
CP DISPLAY Hxxxxxxxx Hxxxxxxxx 00062938(where the low-order 5 digits represent the APAR number)."
05/24/2002 - Ken Hall contributed a patch to
mingetty-0.9.4b which implements the autologin patch for SuSE SLES7. The
source as it came from SuSE would not accept the patch from the author at
05/24/2002 - Lionel Dyck contributed the URL
to a white paper on "The Financial Impact of Migrating to Linux."
from CIOView. There is also an online preview of their "TCOnow! for Linux
Migration" tool. The results almost always come out in favor of Linux/390
on a z900 box, which does make one wonder, a bit...
05/28/2002 - Steven Oswald reported a press
release announcing that "GeCAD Software and Bynari, Inc. Announce
Strategic Partnership to Provide Comprehensive Virus Protection for
Linux on zSeries and S/390."
05/28/2002 - Mark Post reported a ZDNet article
that compared Sun's integration of a number of middleware products into Solaris to
Microsoft's similar strategy. The author also talked about how server
consolidation on this platform might compare to IBM's Linux/390 consolidation
05/29/2002 - In response to a query as to how to
reduce the size of the log for snmpd, Scott Koos gave this suggestion:
snmpd -a -d -V $DEBUGFLAG to: snmpd $DEBUGFLAGthen snmpd's log seems to stay at a polite 23 bytes and it doesn't seem to affect snmp's performance. At least the monitor from Velocity software seems to still work for us."
05/30/2002 - Mark Post forwarded the announcement
of "UnitedLinux" from one of his co-workers. SuSE, Turbolinux, Conectiva,
and Caldera are combining their development teams to produce a Linux Standard Base
platform as the basis for each of their business-oriented distributions. The UnitedLinux
web site has a number of documents to answer questions, present their goals, etc.
05/30/2002 - In response to a query about the
availability of IBM's Transaction Server (aka CICS) on Linux/390, Jim Elliott of
IBM replied that it is not, only on AIX and Windows® NT/2000. Alan Cox commented that
the "traditional choice right now" is BEA's Tuxedo package.
05/30/2002 - Mark Post reported an InfoWorld article
on Linux firewalls, with references to look up for more information. Mark
commented "Nothing really new for any experienced people, but a nice start
for someone unfamiliar with ipchains/iptables."
05/30/2002 - paultz [email@example.com] reported an
article about IBM, and Landmark Graphics signing a deal for IBM to provide "the
global petroleum industry" Linux-based desktops, servers, and mobile products.
05/30/2002 - In response to someone having a problem
getting Oracle on Linux/390 to work, Jim Rich posted this:
05/31/2002 - Uwe Zumpe of IBM reported the following updates to the DeveloperWorks web site:
05/31/2002 - Neale Ferguson submitted a patch against 2.4.7 that will allow Linux/390 to gracefully shut down when one of these situations are encountered:
# Powerdown ca:12345:ctrlaltdel:/sbin/shutdown -t1 -h nowThe version that is on this web site was updated as of June 7th, 2002. Romney White responded by saying that "There's a new contribution to the VM Download library called SHUTTRAP. It provides a mechanism for exploiting the automated shutdown facility from CMS. Enjoy!"
05/31/2002 - In response to a question about what
IBM's CICS Transaction Gateway "does for you," Jim Elliott of IBM replied
"The CICS Transaction Gateway provides a web interface to CICS. But it is a LOT
more than just 'screen scraping' in that it provides a Java environment for enhancing
the CICS transaction environment. Check out the web site at:"
05/31/2002 - During a discussion about FTP servers and
their relative security, Alan Cox strongly recommended vsftpd, especially for internet
facing anonymous FTP servers. He also commmented "That was written from scratch in the
modern era of security awareness both to be secure and highly scalable. It will happily
handle 3000 parallel sessions on an x86 class system."
05/31/2002 - Mark Perry disclosed the secret location where
many of the IBM Linux/390 developers are located: