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
If you collect nmon data while running Active Memory Expansion (AME), you get extra performance stats as below: MEM tab Size of the Compressed pool(MB) Size of true memory(MB) Expanded memory size(MB), Size of the Uncompressed pool(MB) MEMNEW tab Compressed Pool% PAGE tab for paging rates (pages per second) but this time very quickly in and out of the compressed memory area Compressed pool pgins - other tools like topas call this CI Compressed pool pgouts - other tools like topas this call CO Unfortunately, the last two appear in Excel columns... [More]
The following paper by Ralf Schmidt-Dannert discusses the performance impact of AIX micropartition options on a 2 tier Java/C++/Oracle application. His benchmarks show micropartitioningcan have a positive impact on application performance. His conclusionsinclude: 1. The micropartition CPU sharing improved performance over static LPARs2. SMT improved performance (default AIX setting)3. Don't over configure Virtual Processors (My recommendation is to configure at most one Virtual Processor per CPU in the free pool)... [More]
How many Shared Storage Pools in the world? In the recent IBM Edge2015 Technical University conference I had over 160 people join my sessions on SSP. This shows considerable interest on the new features and what is coming next. The release later in the year has a LARGE new feature that we have been waiting for and a bunch of smaller ones that are useful and increase usability - but I can't say more without a Non Disclosure Agreement :-) Just want you to know there is lots more on the way. The Q1 2015 new... [More]
I have tried to get permission to pass on these numbers publically but got no answer at all. As these are facts rather than opinions, I see no harm in them. So I will work on the old theory: "it is easier to ask for forgiveness than permission" ... here goes. The AIX Virtual User Group often asks a few questions as part of the registration process for the next webinar session and it generates fascinating statistics from real POWER and AIX users. Observations: The people that join the AIX Virtual User Group are well above the... [More]
March 11, 2007, marks the start of Daylight Savings Time this year. At 2 a.m. on Sunday, the time will officially "spring forward" one hour. Patches to HMC code have been available on the HMC home page: https://www14.software.ibm.com/webapp/set2/sas/f/hmc/home.html What happens if you haven't updated your HMC by the time DST begins? Will there be an impact on the managed serves? The HMC will not stop working, and neither will the managed servers. The time can be reset manually on the HMC. This will entail rebooting, but again, this has no... [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]
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]
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.
Over the Xmas break I have been busy improving nmon and this is a summary. Below is a summary with pictures: 1 New Performance Statistics GPU First for the OpenPOWER people using the Nvidia GPUs within the S822LC (Firestone) machines we have the Graphical Processor Units and a previous AIXpert Blog covered the details but below is a little reminder: These are the stats on-screen GPU MHz CPU and Memory Utilisation Temperature in C Electrical power in Watts This is also saved to the nmon output file. MHz Below we now noticed the CPU... [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]
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.
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]
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]