AIXpert Blog is about the AIX operating system from IBM running on POWER based machines called Power Systems and software related to it like IBM Systems Director, PowerVM for virtualisation and PowerSC for security plus performance monitoring and nmon
I got asked these questions recently and had to go look the subject up ... again! I seem to have forgotten some of the details and then I thought I would use some new features of AIX for the second part. In the distant past there was various way to stop core files being dumped in to the current working directory of the program that failed. In AIX 5.3, AIX 6 and 7, the "chcore" command does all the hard work for us by letting us
Choose a specific directory for core files - which is best in it own filesystem so it... [More]
I have been touring cities in Europe: Birmingham for the 4 day Technical University, Manchester, central London and Dublin for the Ask the Experts 1 day event and last week Copenhagen for a POWER & AIX User group Technical Event. I have had about 250 to 300 people in my sessions and asked every time - How knows about the AIX Virtual User Group and only had about 30 people put their hands up. I am amazed how few people have found this invaluable resource. The organiser, Joe Armstrong an IBMer, set-ups up roughly monthly world wide... [More]
Just a quick look at the features for AIX7 - which is coming soon. Take a look at AIX7 Preview for an official statement. The two major items for me are 1) Scaling to 256 cores (or CPUs as I have called them for 25 years) Power systems always had lower CPU counts than the competition particularly in the high end machines due to the faster speed of the processor and this benefits batch (single threaded) work, software costs (lower CPU numbers) and is easier for scaling up but now a truly massive POWER7 machine is near and AIX7 is the OS to run... [More]
I've updated my nmon2web tool. Its a performance tracking tool for an entire AIX server farm. It can display daily or long term charts. It also aggregates the performance micropartitions residing on the same physical server. You can download it from http://www.aixtips.com/AIXtip/nmon2rrdv3.htm
There is a potential problem with AIX display of local time which might occur around the transition to standard time this coming weekend. If the problem occurs, in most cases the only impact is that AIX displays local time incorrectly for a day or so around the transition to or from daylight savings time. AIX displays standard time when it should display daylight savings time or vice versa. Of course, while local time is being displayed incorrectly, if some local time is provided to an application (eg, changing the AIX system clock,... [More]
Following on from my previous AIXpert blog on 1st July 2013 - "Core files filling important filesystems? Want email alerts about each core dump?" it was pointed out to me by AIX guru Mathew Accapadi that we can for many years use the ODM and AIX error reporting framework to send emails on the generation of core files. See the previous blog on how to force the core files to a particular directory - and not allow them to fill up important system directories. On the alternative reporting method see below:
Check out the... [More]
The USA AIX Virtual User Group have just announced a Systems Director on Power series of live webinar sessions in the next 3 months. Briefly: Starts May 12th 2011. It is delivered remotely, over the Internet, so you can listen in from your desk and watch the slides or any demonstrations with no travelling. It covers the Overview and Basics through to the high function Tivoli Monitoring (ITM) features that are part of the Enterprise Edition of Systems Director. This is delivered by the USA Advanced Technical Skills (ATS) group and I recognise... [More]
I may have written about these in previous blogs but these have been updated and added too them. They are in my regular Systems Director presentation but I thought they should be shared to a wider audience - no sense is sitting on good information. These are very much my thoughts and opinions for POWER and mostly AIX systems. These are not official IBM statements. 1) Quick Introduction . If you want a 12 minute look at how Systems Director can benefit Power and AIX system administrators in eight ways then watch my 12 minute movie. After... [More]
Systems Director 6.3.1 is available This includes a fix I needed. On a completely fresh install the Update Manager will not work with the NIM server for AIX updates due to a bug that forgets to create /export/um_lpp_source on the NIM server - oops! Fixed with: /usr/sbin/crfs -v jfs2 -g rootvg -m /export/um_lpp_source -a size=1G But make sure it mounts by default on AIX reboot. Find the What's New for 6.3.1 Install the new ISD 6.3.1 update and lots of fixes - you get Systems Director to do upgrade as normal
If you read this blog regularly then you will know I am a fan of the VIOS Shared Storage Pool technology .
It is a major peice of the "Making PowerVM and VIOS - easier to live with and reduce the man-power" story and it is hard to believe that we started withPOWER4 virtualisation in 2000 and VIOS in 2005. This does mean that the tools we use (HMC and VIOS padmin) need a bit of an update and I know these are in plans for the future. Even now we can start using SSP to save lots of system admin time and be more flexibly... [More]
ITM means IBM Tivoli Monitoring and is part of the Tivoli software suite for cross platform Systems Management performance monitoring. I has been around a long time and is a very feature rich product. In this blog was don't want to list some of its 100's of features but it is fully Power Systems Aware and captures all the advanced stats from new features of POWER6 and POWER7. Here we just want to point out that it can capture all the information you want and display is any way you want from its database of stats that it collects from its... [More]
Hints &Tips for Systems Director 6.2+ for AIX on POWER (Part 2) Here are a few more hints and tips - you can find Part 1 HERE 23) Excellent document on getting Systems Director running faster or starting with the right resources The document "Performance Tuning and Scaling Guide for IBM Systems Director 6.2.x" can be found at: http://tinyurl.com/SDperformance 24) Systems Director supported SAN Disks + Switches matrix can be found at http://tinyurl.com/SDdisks This explains the way that various disks are connected to Systems... [More]
LPARMon is a graphical tool that monitors the overall performance of a partitioned Power5 server. The tool is available for download at http://www.alphaworks.ibm.com/tech/lparmon LPARmon monitors entitlement, SMT state, processor and memory use by LPAR, and the size of the shared processor pool. There is also a history feature that displays an LPAR's processor use over time. Supported operating systems include AIX 5.3, AIX 5.2, and Linux.
It has been a busy fortnight and I just realised I have micro-blogged (Twitter) comments and link but neglected this AIXpert Blog - sorry about that. Here is a summary and a lot more thoughts that Twitter allows. I actually like the discipline of the Twitter 140 characters as if forces you to get to the point!
Firefox First, I have upgraded to Firefox 10 Enterprise from 3.6 - I was having multiple problems with the older release that had previously seemed to be the only safe one for using both HMC and IBM Systems Director. In particular,... [More]