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nohup -p on AIX.
The nohup command in AIX has the
ability to “nohup” an existing process and protect if from hangup signals. Using the -p flag, an existing, running process can be “nohup’ed” and told to ignore SIGHUPs. "Why is this useful?" I hear you ask. Well, I'll often start a "long running" process
on a system at work, like a backup for instance. I'll sometimes forget to use the nohup command, so that my long running job will ignore any SIGHUPs and continue
running, say for example if my ssh session to the server dies. The nohup... [More]
Marcações:  nohup gibson aix chris |
catman -w on AIX.
Have you
ever encountered this error message on AIX before? # man -k loopmount man: 0703-310 file man not found. Create the whatis database using the <catman -w> command
Of course
you have! If you’ve ever installed AIX from scratch then you have undoubtedly
seen this message. And of
course, you dutifully executed the ‘ catman –w ’ command to rectify the situation. Didn’t you? But what if
‘ catman –w ’ doesn’t work as expected? I recently came
across this minor issue. Running catman produced the following error... [More]
Marcações:  gibson whatis catman chris aix man |
saposcol and shared memory on AIX.
If you are
a system administrator that is responsible for managing AIX systems that run
SAP, then you’ve probably had an experience similar to the following? OK, so one
day my SAP Basis administrator contacts me and says “ I can’t start saposcol ......can
you please reboot the system? ” I quickly reply, “ Was there an error message when trying to restart saposcol ?”. He
replies, “ No ”. Again I return very
quickly, “ OK, have you checked to see if
there are any shared memory segments left for saposcol? ”. Just as quick, he replies “... [More]
Marcações:  aix ipcs ipcrm memory gibson chris shared saposcol |
AIX 7 Open Beta is live - it's time to test!
OK, it’s
official. The AIX 7 Open Beta is now available for testing! An
overview of the program is available here: https://www14.software.ibm.com/iwm/web/cc/earlyprograms/websphere/aix7ob/index.shtml Essentially
this program is designed to give IBM customers, ISVs and IBM BPs the
opportunity to gain early experience with the latest release of AIX prior to
general availability. This is a great time to join forces and help IBM mould
the next generation of the AIX OS. I got
involved in the AIX 6 Open
Beta back in 2007 . It was a... [More]
Marcações:  chris 7 beta gibson aix open |
rmsock on AIX.
I like lsof . Whenever
I’m building a new AIX system I always make sure to install it. I really like
the fact that I can quickly list processes that are connected to TCP and UDP
ports on my system. For example, to check for the current SSH connections on my
system I can run lsof and check
port 22 (SSH). Immediately I have a good idea of the existing SSH
sessions/connections. I can also check to see if the SSH server (sshd daemon)
is running and listening (LISTEN) on my AIX partition. # lsof -i tcp:22 Value of I :77 np:0 COMMAND... [More]
Marcações:  rmsock gibson aix netstat lpar wpar lsof chris |
A 'first look' at creating an AIX 5.2 WPAR on AIX 7.
I created my first ‘versioned’ AIX 5.2 WPAR on AIX 7 today. To get
me started, I followed the steps in the following guide from the AIX 7 Open
Beta On-line Information Centre: http://publib.boulder.ibm.com/infocenter/aix/v7r1/index.jsp?topic=/com.ibm.aix.cre/creconfig-create-wpar.htm In order to create the WPAR, I needed an AIX 5.2 mksysb file to
supply to the mkwpar command. Fortunately, I just happened to have an old AIX 5.2 mksysb image
in my archives! I then executed the following command to build the WPAR: # mkwpar -n wpar1... [More]
Marcações:  versioned beta wpar aix gibson chris 5.2 open aix7 |
AIX or Linux on POWER?
IBM made some announcements today relating to
their latest POWER7 server offerings. The new line of systems includes new
entry level systems and the highly anticipated high-end system, the POWER7 795 !
They also officially outlined some of
the new features available in AIX 7.1. You can review the details here .
I’ve discussed some of these new features here and here .
The official AIX 7.1 announcement details are available here . The announcement got me thinking about my
recent customer engagements and why some have chosen to deploy... [More]
Marcações:  chris linux gibson ibm power aix |
Renaming devices in AIX 7.1
I remember reading this interesting document about some challenges
renaming AIX devices. http://gibsonnet.net/aix/ibm/The_Fun_of_Oracle_RAC_ASM_and_Device_Names.doc This poor guy had to jump through some hoops to rename some disk
and network devices in a clustered AIX (Oracle RAC) environment. This comment stayed with me: “ The easy way to get network
adapters and disk names to match between systems would be to run
something like # chdev –l old_name –n new_name Except, this command option does NOT exist. ” Since then I’ve... [More]
Marcações:  7.1 gibson aix chris rendev |
A journey into the world of VLAN tagging and Virtual I/O!
I just had to share this entertaining presentation with everyone. http://gibsonnet.net/AIX/ibm/Journey_in_VLAN_world.pps Or the PDF. It's not as interesting or fun, as the animations don't work but you get the idea. I'm sharing the PDF because it appears that you can open this file on Windows fine (in read-only mode) but on a Mac it prompts for a password without an option for opening in read-only. Shame. https://www.ibm.com/developerworks/community/blogs/cgaix/resource/Journey_in_VLAN_world.pdf It was... [More]
Marcações:  powervm lemal chris aix vlan vio ibm bernard gibson |
The next generation Virtual I/O Server!
Interested
in learning more about the next generation of Virtual I/O Server? Yes? Then
take a look at this presentation. https://www.ibm.com/developerworks/mydeveloperworks/blogs/cgaix/resource/VM19.pdf The
following diagram gives you a high-level overview of the classic VIOS compared with the NextGen VIOS. Should be enough to spark your interest! Happy reading!
Marcações:  powervm aix chris gibson gen next vios |
Is my POWER7 system AME capable? Is AME supported with SAP in production?
A colleague of mine contacted me during the week to ask how one could
determine if a POWER7 system was capable of Active Memory Expansion. I thought
I'd share my response with everyone who follows my blog. You can check if the system is capable of providing Active Memory
Expansion (AME), from the HMC command line using the lssyscfg command, as shown here: hscroot@hmc1:~>
lssyscfg -r sys -m Server-8233-E8B-SN1000 -F active_mem_expansion_capable 1 Alternatively you can view the capabilities of
the managed system from the HMC GUI,... [More]
Marcações:  ame gibson power7 sap lparstat hmc memory chris amepat expansion active aix lssyscfg |
AIX 7.1 – DSM dgetmacs.
I received an email this week from a
colleague that worked with me on the NIM
Redbook back in 2006. He was experiencing an issue with DSM and NIM. He was
attempting to use the dgetmacs command to obtain the MAC address of the network adapters on an LPAR. The
command was failing to return the right information. This was the output from his attempt
with dgetmacs : # dgetmacs -n lpar1 Using an adapter type of "ent". Could not dsh to node lpar1. Attempting to use openfirmware method to
collect MAC addresses. Acquiring adapter... [More]
Marcações:  nim aix chris dgetmacs 7.1 gibson dsm |
Migrating to AIX 7.1 with nimadm.
Last year I wrote an article on using nimadm
to migrate to AIX 6.1 . The procedures outlined how to migrate a live system with nimadm and a spare disk. Another method that I have found to be extremely useful is
the migration of mksysb images from one version of AIX to another using (you
guessed it) nimadm . In the following example I migrated an AIX 6.1 mksysb image
to AIX 7.1 and then used that image to install a new LPAR via NIM. The source LPAR was running AIX 6.1 TL6 SP3. I took a mksysb
of this system to my NIM master. # oslevel -s... [More]
Marcações:  gibson migration chris nimadm aix |
AIX multibos mksysb migration
I’ve
written about multibos before, here and here . But recently I
started experimenting with multibos mksysb migration. A customer asked me how
this worked and apart from a high-level view I wasn’t able to provide any real
world experience, so I thought I’d give it a try. What follows is just a ‘brain
dump’ from my quick test. First of all
this isn’t really a migration. It just simply populates a second instance of
AIX with a higher-version. It doesn’t really migrate (or merge) your existing
configuration into the second instance. So... [More]
Marcações:  mksysb aix migration multibos chris gibson |
DLPAR not doing it for you anymore?
I received an email from one of my customers recently that simply said: “mate …on lpar30, for some reason the IBM.DRM and others are failing to start .. um .. any chance you could have a quick look at that ?” So I asked, “OK, so this use to work right?”. To which I received a relatively confused reply, ” .....yep it did....actually no....it’s never worked....or has it???...I’m not sure... ”. Based on my experience, the most common issue that prevents DLPAR operations... [More]
Marcações:  gibson chris dlpar aix |