AIXpert Blog is about the AIX operating system from IBM running on POWER based machines called Power Systems and software related to it like PowerVM for virtualisation, PowerVC for Deploying VM's and PowerSC for security plus performance monitoring and nmon
Update Version 14: Just release version 14 (17th March 2016) Changed format a little in light of experience of uploading to the Work Load Estimator Changed to official Column header line Note: it is mandatory to include the header line generated but nmon2WLE -c The online IBM WLE tool needs a specific string to identify the System = the web tool pops-up the list for you to select from. Unfortunately, these strings and user friendly server names ( like Power Systems E850) are not available within AIX so nmon reports just the System Model:... [More]
Starting in AIX 5.3 ML5, there is a new "topas -R" option that records theperformance of all partitions on a physical server. The command is runon just one server, and the output is stored in the /etc/perf directory. The "topasout" command converts the output file into a CSV or XML file. The CSV file can be imported into the nmon Analyser 3.2.3+. (Requires AIX 5.3 TL5 service pack 4 with APAR IY87993) The advantage is that topas is a supported tool. The disadvantage isthat it is not well documented, and you have to do some of the parsing. ... [More]
The System p Support site has migrated to a new subscription service tool for support notifications named My notifications You'll need an IBM Developerwork's ID. (It's free and painless to register a new ID) Subscriptions for IBM Systems provides the following new features: - Ability to create multiple subscriptions with different topics and notification options- Ability to create and name multiple folders to organize your subscriptions- Ability to specify weekly or daily notifications when a topic is updated- Ability to access the PTF Cover... [More]
One way to determine if there is an I/O bottleneck in AIX's Logical Volume Manager (LVM) layer is to run the "filemon" command. The filemon output shows I/O response times for both Logical Volume (LV) and Physical Volume (PV) layers. If the difference is over 2-3 ms, there could be an I/O bottleneck in LVM. If so, check the LVM buffer statistics at peak I/O loads. Run the "vmstat -v" several times, and look for increasing "I/Os blocked" in any of the buffers. (The rate of change is important, not absolute values). Use the "ioo" command to... [More]
If you're planning to upgrade the microcode on your p590/p595 system, I recommend waiting for the 153 version which should be out soon. (The current version is 150, Nov 2005) If you have already planned an outage for the upgrade, I would consider downloading the 153 ISO image from the server located in Boulder. open a DOS window ftp testcase-blue.boulder.ibm.com enter 'anonymous' as the id enter 'your e-mail address' as the password cd /hardware/fromibm/9119/ bin mget 01SF230_153_120.iso Be sure to check the prereq's before upgrading: -... [More]
The question I was asked: Can I have two pools in the SSP for AIX rootvg disks and data volume group disks? Answer: no Explanation: Only one pool per Shared Storage Pool. Alternative is you that could use two SSP Tiers in a single SSP! Tiers provides more than multiple pool in functions and usability. Question: Is two tiers a good idea? Answer: no Explanation: Tiers have separate LUNs for each tier. Having two tiers to split these types of LU (SSP virtual disks) use is rather pointless and will reduce performance. You might... [More]
In case, you did not notice (as its the silly summer season) AIX 7 is shipping in 19 days time. See the official AIX 7 Announcement Letter for all the details This is a whole 2 months early - well done guys.
Samba is an open source, free software suite that provides seamless file and print services between Windows® clients and UNIX®-like platforms. It can be run on a UNIX-like platform like AIX®, BSD® UNIX, Linux®, IBM® 390 and OpenVMS. Samba uses the TCP/IP protocol that is installed in the host server. When configured, this server software allows the host machine to share files and printers and make them accessible from Windows clients. The following URL provides setup instructions... [More]
I am upgrading my VIOS to 188.8.131.52 which includes SSP5 Tiers functions and LU grow functions and lots of other improvements To keep track of the nodes that still need to upgraded you can use the VIOS cluster -status -verbose command but the details fly up the screen and ate not visible without scrolling back and are gone and I really don't what to see all those massive hexadecimal internal Id's etc. So here is a quick one line script "ncluster" /usr/ios/cli/ioscli cluster -status -verbose -fmt : -field... [More]
HACMP recently announced support for the following: HACMP 5.4.1 for Linux HACMP Support Announcement for the JS22 HACMP supports the IBM 4-Port Ethernet 10/100/1000 Base-TX PCI-X Adapter HACMP announces support for P6 p520 and p550 HACMP supports IBM VIO Server V1.5 Click on the above linked text for full support details.
In the OpenPOWER IBM S812LC - First Look we had a look at the basic machine but in this blog we now have 12 disks to add and a RAID SATA adapter to drive them. I have made an update with new information at the end of this Blog in red. Here is a repeat of the first picture but highlighting the details for supporting the twelve 3.5 inch Front Disk Bays: Note: The three blue SATA cables are provided with the basic system but not connected to anything, of course, until now. Below the delivery unpacked... [More]
I use the following formula to size the minimum number of cores on replacement servers. The formula is based on "used" performance on the installed servers matching "used" performance on the replacement server. c2 = (u1)(c1)(p1) / (u2)(p2) Where c1 = # cores on the installed server p1 = "performance per core" of the installed server u1 = % utilization of the installed server c2 = # cores on the replacement server p2 = "performance per core" of the replacement server u2 = % utilization of the replacement server If consolidating multiple... [More]