- VIOS prerequisites
- creating a cluster
- thin provisioning
- Live Partition Mobility
- a cheat sheet for SSP commands
AIX Down Under
Matching: lpm X
AnthonyEnglish 270000RKFN Tags:  lpm shared_storage_pools lady_gaga live_partition_mobility twitter powervm nigel_griffiths webinar aix_celebrities 6 Comments 13,816 Views
The team from IBM's Advanced Technology Support, Europe have done it again! Their free Webinar Series on Power Systems Virtualisation from IBM has another contribution from Nigel Griffiths, (a.k.a. Mr NMon). This presentation is on Shared Storage Pools from Experience - a kind of walk through of where the rubber hits the road. On the PowerVM Virtualisation Webinar Series Wiki, scroll down to Session 13: Shared Storage Pools ... from Experience.
As you probably know, Shared Storage Pools allow you to have a large single chunk of storage allocated to multiple Virtual I/O Servers and then leave you to manage how that storage is cut up for the virtual clients (the AIX logical partitions). That makes for fast provisioning of storage, which removes a common roadblock in projects. With Shared Storage Pools, you can reduce the storage provisioning time down from weeks to ... seconds!
The webinar is not a sales pitch. It's a techie's take that steps you through:
... and a whole lot more. There's a presentation which you can download. It includes very helpful diagrams and screenshots. If you have the time, download the 1 hour webinar session, to hear Mr NMon himself. And who can resist downloading the SSP commands cheat sheet? (It's colour-coded, too!)
Finally, I'd encourage you to register for the Webinar series via the PowerVM Wiki. You get an email alert each month to advise you of the upcoming topic, and you can watch the presentation live, participate in surveys and so on.
.. and a Plug for Twitter
Maybe you, like me - and many other AIXers - are of a certain age and are sceptical of the benefits of social networking, especially via Facebook and Twitter. Well, I have to say that I have found Twitter a great source of valuable, timely information on AIX. You don't have to follow every last celebrity, but I would encourage you to sign up, if only to follow a few of my favourite AIX celebrities, all of whom deserve more of a following than Lady Gaga, IMHO:
Nicolette McFadden, the most prolific AIX tweeter in Social Media land
and my Aussie compatriot,
So much for some of the celebrities in AIX twitter space!
If you're really keen, you could
follow me on Twitter, too.
AnthonyEnglish 270000RKFN Tags:  wpar live_partition_mobility virtual_optical powervm tuning aix rob_mcnelly ken_milberg vmlibrary performance resources aix7 lpm vio 10,505 Views
Among the plethora of good AIX resources coming to our browsers in the last week, a few deserve a particular mention.
First, there was the Power IT Pro Virtual Conference.
I had a chance to watch Rob McNelly's presentation.
Rob, who writes the unmissable weekly AIXchange blog, covered a lot of AIX topics, letting the viewer look over his shoulder as he strolled through the use of:
I really believe watching over someone's shoulder is almost the best way of learning. The very best way of learning is, of course, having senior management watching over your shoulder when the prod system is down and your job's on the line. Rob's engaging style doesn't give the impression that he was under that sort of pressure, but don't worry - you won't fall asleep.
There was also what would undoubtedly have been a superb presentation by Ken Milberg on AIX performance tuning. Given the fact that the organisers insisted on running this presentation at 3 o'clock in the morning (at least, that was the time in Sydney), I didn't catch it, but I plan to. The PowerITPro web seminars are online for those who registered before the event. I expect you can register now and then access them.
What? A performance!
Ken also has co-written a three part series with Martin Brown on Optimizing AIX 7 memory tuning. It covers:
VIOS - Beyond the Basics
The AIX Virtual User Group - USA had a memorable session on the Virtual I/O server - beyond the basics. Beyond the basics? I'll say. There's been a lot of interest in the VIO server, in the light of the upcoming nextGen VIO server. A good deal of the material in this 90 minute presentation addresses the new features, and explains how on earth a VIO server can service a client on a different physical server. If 90 minutes is too big a slice of your life, at least have a flick through the presentation materials.
AnthonyEnglish 270000RKFN Tags:  powerha live lpm migrate cookbook high_availability aix hacmp uptime workload_partition migration wpar outage live_partition_mobility 2 Comments 11,913 Views
High Level high[-er] availabilty options
IBM HACMP (High Availability Cluster Multiprocessing) has been available since 1991. It was renamed to IBM PowerHA and, more recently PowerHA System Mirror for AIX. While studying up on this recently, I came across some excellent comparisons between PowerHA, Live Partition Mobility and migration of Worload Partitions (WPARs). This is a high-level comparison of how the three might help with managing outages and make for higher availability, even if they aren't all PowerHA.
LPM and HA
First, Live Partition Mobility (LPM). This is the facility which allows you to migrate a running partition with its applications from one physical server to another without disrupting services. The Redbook for IBM PowerVM Live Partition Mobility explains:
.Live Partition Mobility increases global availability, but it is not a high availability solution. It requires that both source and destination systems be operational and that the partition is not in a failed state. In addition, it does not monitor operating system and application state and it is, by default, a user-initiated action.So LPM is good if the outage is planned.
"Live" for a reason
The difference between HA and LPM came home to me recently when I was watching a presentation by an IBMer on PowerHA. Shawn Bodily has worked on HACMP/PowerHA for over ten years. He was on the team that wrote the excellent PowerHA for AIX Cookbookand he presented webinars (see below) over three days in July 2009 on PowerHA (as it was then called). In the second of those days, Shawn answers a question about LPM as an alternative to PowerHA. Here is my transcript of the relevant section:
"When we talk about clustering we talk about reducing planned outages and unplanned outages. Most people associate it [HACMP] with unplanned outages but by far, most downtime today is still planned maintenance and Live Partition Mobility is great for planned maintenance if it's hardware related. If I'm upgrading a server and people can do firmware updates dynamically [i.e. concurrently] and some people choose not to. If I'm doing something like that, Live Partition Mobility is great. Even most of the maintenance is software maintenance. If you have to upgrade your application, update AIX, Live Partition Mobility does nothing for you. Here's why: the fact you're running the exact same rootvg and application on another frame."WPARs for AIX update