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Chris Gibson's AIX and PowerVM blog.
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AIX 6.1 migration: iostat and maxuproc change to their defaults?

cggibbo 270000TMUJ | | Comments (7) | Visits (33604)

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Before migrating to AIX 6.1 you might want to check that ncargs is set to a value greater than or equal to 256 e.g. # chdev -l sys0 -a ncargs= 256   $ lsattr -El sys0 -a ncargs ncargs 256 ARG/ENV list size in 4K byte blocks True Let me elaborate. Recently we migrated our LPARs from AIX 5.3 to AIX 6.1. Our AIX 5.3 systems were migrating from 5300-07-05-0831 to AIX 6.1 at 6100-03-01-0921. During the testing of the migration process we noticed that some of the sys0 tunables were being reset to their default settings after the migration had... [More]

Using the AIX splitvg command.

cggibbo 270000TMUJ | | Comment (1) | Visits (25848)

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Just the other day, I needed to use the AIX splitvg command in order to copy some data from one system to another. I thought I’d share the experience here. The splitvg command can split a single mirror copy of a fully mirrored volume group into a separate “snapshot” volume group. From the man page: The original volume group VGname will stop using the disks that are now part of the snapshot volume group SnapVGname. Both volume groups will keep track of the writes within the volume group so that when the snapshot volume group is rejoined with the... [More]

Tags:  aix lvm

Live Partition Mobility IBM Wiki site.

cggibbo 270000TMUJ | | Visits (6648)

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Came across the following IBM Wiki site which is dedicated to all things related to Live Partition Mobility (LPM) on IBMs Power6 (and Power7) platform.   http://www.ibm.com/developerworks/wikis/display/virtualization/Live+Partition+Mobility Lot's of really interesting and useful information regarding LPM. If you are planning on implementing LPM, or even if you are already using it, I recommend you take a look at this site. Cheers. Chris
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