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Shared Ethernet Adapter (SEA) Failover with Load Balancing
Update: The developers and the manuals call this Load Sharing but most people think it is called Load Balancing. Perhaps, balancing gives the wrong impression of fine grain packet by packet balancing where we actually have higher level, cruder splitting of the work with Sharing. Below I use the word Balancing but mean Sharing. I have got a few questions recently on how to set this up as there are announcement with near zero information on setup, the configuration needed and a worked example. So here goes. For a long time now we have had SEA... [More]
Marcações: sea shared failover aix balancing power7 load powervm ethernet adapter |
10Gbit Ethernet, bad assumption and Best Practice
Below is from your Power Systems, Advanced Technical Support team in Europe (EMEA) with lots of input from many people. We find many people are over optimistic and making assumptions - which can catch them out - we learnt the hard way too. Don't Assume 1 - The same boost as last time It may be that you migrated from 2Mit to 10Mbit and saw approximately a 5 fold increase in performance. Similarly when you went from 10Mbit to 100Mbit, and from 100Mbit to 1Gbit; you saw approximately a 10 fold improvement. Don't assume that... [More]
Marcações: cables sea ive control ethernet mtu flow largesend 10gbit hea |
PowerVM has multiple internal Virtual Ethernet Switches - Info please?
This is a follow on to a previous blog on " PowerVM Virtual Ethernet Speed is often confused with VIOS, SEA IVE/HEA speed "- here is a Direct Link I regularly get asked : "I have just heard about this [PowerVM virtual switch | vSwitch | Hypervisor Ethernet Switch] is available but I can't find out any information at all, help!" They are wanting to run two (or more) virtual switches within the one Power machine to completely separate the network packets of groups of virtual machines (LPARs) so they know for sure there can... [More]
Marcações: vswitch switch hypervisor power6 power aix ethernet powervm power7 virtual |
PowerVM Virtual Ethernet Speed is often confused with VIOS, SEA IVE/HEA speed
Update in 2016: Please note this blog is from 2011 during the initial POWER7 days and technology has moved on with faster CPUs and memory in addition there has been software improvements. I am amazed how many good computer people read this and assume this blog is true to all time! Virtual Ethernet is faster now but there is also a warning here. Here is an analogy. Most vehicles can do 10 MPH (including me on a bike), most cars can do 100 MPH (including my family car) but very few vehicles can do 1000 MPH. That last times ten multiplier is... [More]
Marcações: vios machine misunderstood power7 power6 aix virtual speed ethernet powervm |
High Speed Adapters need Sensible Memory Sizes
AIX or VIOS Start-up Memory Problems I have been working with a couple of customers that have a newly setup AIX Logical Partition (LPAR) that fails to start due to not having enough memory. The common factor is that the LPAR for AIX (or VIOS) includes a good number of what I call "high speed" adapters like 10 Gbps Ethernet, or 4 Gbps or 8 Gbps Fibre Channel adapters. They tend to have multiple adapters of each type for redundancy and throughput. For example, trying to start the LPAR with 1 or 2 GB of memory but it turned out they need... [More]
Marcações: 10gb 8gb fc vios memory ethernet high firbe-channel adapters speed aix |
