This post is a list of generic points I am checking when I setup Live Partition Mobility.
Official IBM checklists
IBM provides two official check list for LPM:
Fix Level Recommendation Tool LPM
The first step is to validate if your systems and operating systems doesn’t have a known issue which could impact the LPM operation. FLRT allows you to check your environment and provides recommendations on updates or upgrades needed for LPM.
Note: validations are done only for LPM operation support.
You can have additional recommendations when checking if the system and operating systems are up to date in the FLRT system check.
RMC network communication
Dynamic partitioning needs to work properly.
RMC communication is needed between th HMC and: * source system VIO servers * destination system VIO servers * lpar to move
if you can perform DLPAR operations on vios and lpar, RMC is working well.
You can also run “lspartition -dlpar” on your HMC to check the RMC status:
lspartition -dlpar <#0> Partition:<6*8233-E8B*100EB9P, baslibre172, 10.10.10.172> Active:<1>, OS:<AIX, 7.2, 7200-00-00-0000>, DCaps:<0x2c5f>, CmdCaps:<0x1b, 0x1b>, PinnedMem:<768> <#1> Partition:<1*8286-42A*213BEBV, S824A-vios1, 10.10.10.140> Active:<1>, OS:<AIX, 6.1, 6100-04-11-1140>, DCaps:<0x14f9f>, CmdCaps:<0x1b, 0x1b>, PinnedMem:<1128> <#11> Partition:<1*8202-E4B*103286P, oldnim, 10.10.10.132> Active:<0>, OS:<, , >, DCaps:<0x0>, CmdCaps:<0x0, 0x0>, PinnedMem:<0> <#12> Partition:<5*8286-42A*213BEBV, baslibre211, 10.10.10.211> Active:<0>, OS:<Linux/SuSE, 3.0.101-63-ppc64, 11>, DCaps:<0x0>, CmdCaps:<0x0, 0x19>, PinnedMem:<0> <#15> Partition:<6*8233-E8B*06269FP, rhel72-admin, 10.10.10.142> Active:<1>, OS:<Linux/Red Hat, 3.10.0-327.el7.ppc64, 7.2>, DCaps:<0x2c7f>, CmdCaps:<0x19, 0x19>, PinnedMem:<0>
If RMC is working properly, you should see the operating system version and partition ip address.
DCaps field must not be equal to 0.
Mover Service Partition
To move a active partition, you need to define at least one vio server as Mover Service Partition on each physical frame. This vio server doesn’t need to be the one virtualizing the I/O of the partition.
Recommendation: When you have multiple vio servers, it’s a good design decision to choose the less critical or used vio server(s) to be the Mover Service Partition.
Communication can go between routed networks. If a firewall is involved, read this document : https://www-01.ibm.com/support/knowledgecenter/POWER8/p8hc3/p8hc3_vioslpmfirewall.htm
The Live Partition Mobility operation try to maximize bandwidth usage.
Asymmetric configuration should be avoided if possible.
Enable flow control end to end to improve performance in this configuration.
System memory region size
For LPM, the source and destination systems needs to use the same memory region size. A physical system reboot is needed to change it.
Partition processor compatibility mode
|Server Processor Type||Supported modes|
|Power7||Power6 Power6+ Power7|
|Power8||Power6 Power6+ Power7 Power8|
The destination system needs to support the partition current processor compatibility mode.
See IBM web site for mode definitions: processor compatibility mode definitions
Note: Partition Processor compatibility mode cannot be changed online.
No physical adapter
IBM I: No OptiConnect or HSL
IBM I: Restricted IO
No virtual optical device
You need to identify the VSCSI host adapter for your partition.
Use lsdev -type adapter and check the slot location.
List if any media is loaded in the virtual cdrom:
unloadopt -vtd vtoptX
Remove the virtual optical device:
rmvdev -vtd vtoptX
Recreate the virtual cdrom:
mkvdev -fbo -vadapter vhostX
vopt_manager is a tool I developed to manage virtual cdrom on your partitions.
You can add and remove them dynamically.
Project page: https://github.com/adejoux/vopt_manager
I will stop here for now. I will cover other points like network and disks in following posts.