GPFS : mmchnode to change a GPFS node’s IP breaks the cluster ?

I had to change IPs of my 2-nodes GPFS cluster, in order to move them from a LAN network to a DMZ. So what I did, is : I changed the system’s IP address without stopping the cluster (yeah, I

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1-Liner : Get the WWNs associated with your hdisks from a list of hosts

 

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0516-082 varyonvg: Unable to access a special device file

from http://how-2-know.com/main/2013/03/27/0516-082-varyonvg-unable-to-access-a-special-device-file/   if you got the following error while you trying to vary on a volume group: just make the following steps:

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IBM Enterprise pools cheatsheet

Create an enterprise pool (license file needed) List existing pools managed by the HMC List details of Enterprise pool :  List only available proc units and memory:   List HMC which are managing Enterprise pool    List history of commands

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[VI] KSH command line tips in vi editor mode

As always, this is a post in progress, I may update it from time to time, so don’t worry if you don’t find what you need, come back later and maybe you will find it next time 🙂 I also

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almost 1-liner : recreate LV/FS from a similar host without SMITting it out

Just to be clear, I know that there are some AIX bundled commands like mkvgdata and restvg which can do much better by saving/restoring the data structure of a VG, in order to clone it, or recreate it on any

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Cannot extendvg with a previous Oracle ASM disk?

  We surely have here an old recyled ASM disk (because of the ORCLDISK word in the disk’s header). We need to clean this before using it. Links https://www.ibm.com/developerworks/community/forums/html/topic?id=77777777-0000-0000-0000-000014085478 http://www.aixmind.com/?p=555 http://www-01.ibm.com/support/docview.wss?uid=isg3T1011872 http://www.wmduszyk.com/?p=5264&langswitch_lang=en  

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1-liner: recreate a routing table from a similar host

On the source Just execute this on the source host, for the « host » routes : Just execute this on the source host, for the « net » routes :  On the target Just copy/paste the result on the target and voilà !

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HMC UPDATE/ UPGRADE, doing it remotely or locally

HMC UPGRADE –# V7R7.2 to V7R7.6, or from V7 to V8 for example. You can find network install resources right here : ftp://public.dhe.ibm.com/software/server/hmc/network/ or there: ftp://ftp.software.ibm.com/software/server/hmc/network/ …or there : http://www14.software.ibm.com/webapp/set2/sas/f/netinstall/home.html Prerequisites Backup your data !!! Cleanup first As said on

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Small NIM cheatsheet

Bundle creation A NIM installp bundle is a file that contains the names of filesets that should be installed or removed by a NIM operation. 1. installp bundle file creation, I for filesets, R for RPM : 2. installp bundle

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