I received an email this week from a colleague that worked with me on the NIM Redbook back in 2006. He was experiencing an issue with DSM and NIM. He was attempting to use the dgetmacs command to obtain the MAC address of the network adapters on an LPAR. The command was failing to return the right information.   This was the output from his attempt with dgetmacs :   # dgetmacs -n lpar1 Using an adapter type of "ent". Could not dsh to node lpar1. Attempting to use openfirmware method to collect MAC addresses. Acquiring adapter... [More]

Tags:  nim chris aix 7.1 dgetmacs dsm gibson

Just say you change the queue_depth on a hdisk with chdev –P . This updates the devices ODM information only, not its running configuration. The new value will take effect next time I reboot the system. So now I have a different queue_depth in the ODM compared to the devices current running config (in the kernel).   What if I forget that I’ve made this change to the ODM and forget to reboot the system for many months? Someone complains of an I/O performance issue....I check the queue_depths and find they appear to be set appropriately... [More]

Tags:  chris lsattr 7.1 chdev queue_depth aix odm -p kdb 6.1 gibson

Using Cluster Aware AIX with AIX 7.1 you can create a cluster of AIX nodes. This interconnected cluster of nodes can immediately provide several capabilities, such as:   ·          Clusterwide event management. ·          Communication and storage events: o    Node UP and node DOWN o    Network adapter UP and DOWN o    Network address change o    Point-of-contact UP and DOWN o    Disk UP and DOWN o    Predefined and user-defined events ·          Clusterwide storage naming service ·          Clusterwide command... [More]

Tags:  caa_private0 caa event aware ahafs cluster mkcluster aix cldisk1 7.1 lscluster

In this post I’ll demonstrate how to create a Cluster Aware AIX (CAA) cluster on AIX 7.1. I’ll create a simple two-node CAA cluster. I’ll then check the cluster status and, finally, remove the cluster.   Before I start, I make sure that both nodes have entries in /etc/hosts on both systems.   node1[/] > grep node /etc/hosts 172.29.134.169   node1 172.29.152.160   node2   node2[/] > grep node /etc/hosts 172.29.134.169   node1 172.29.152.160   node2   I verify that cluster services are not active on both nodes.   node1[/tmp/cg]... [More]

Tags:  creating mkcluster lscluster caavg_private caa cluster 7.1 chris gibson creation aware aix

Whilst working with one of my AIX customers recently I discovered a problem with NIMSH and SSL. The customer had updated their NIM master from AIX 7.1 TL4 SP1 to AIX 7.1 TL4 SP3 . After the SP update, any attempt to connect to a NIM client (over NIMSH+SSL), from the NIM master, would simply hang. For example, we tried to list the filesets on the NIM client with this command, which never returned any output.   [root@750lpar4]/ # nim -o lslpp 750lpar9   The /var/adm/ras/nimsh.log file, on the NIM client, showed that the NIMSH session... [More]

Tags:  nimsh nim sp3 hang lslpp chris ssl 7.1 aix 7100-04-03-1642 tl4 gibson iv93152 -o libssl.so

  I’ve been working with a customer recently on an issue with nimadm . They were attempting to migrate a system from AIX 5.3 to 7.1 using nimadm . The NIM client AIX level was 5.3 TL12 SP4 and the NIM master was running AIX 7.1 TL1 SP1.   lpar1 : / # oslevel -s 5300-12-04-1119   root@nim1 : / # oslevel -s 7100-01-01-1141   They were running the following nimadm command:   # nimadm -j nimadmvg -c lpar1 -s spotaix710101 -l lpp_sourceaix710101 -d hdisk1 -Y   The nimadm operation would always fail at phase 11:  ... [More]

Tags:  altinst_rootvg nimadm: client attention: cloning error returned multibos 6 unexpected init_multibos() 11 7.1 phase alt_disk_copy: nimadm on result an .1 0505-218 5.3 aix 0505-187

I remember reading this interesting document about some challenges renaming AIX devices.   http://gibsonnet.net/aix/ibm/The_Fun_of_Oracle_RAC_ASM_and_Device_Names.doc   This poor guy had to jump through some hoops to rename some disk and network devices in a clustered AIX (Oracle RAC) environment.   This comment stayed with me:   “ The easy way to get network adapters and disk names to match between systems would be to run something like   # chdev –l old_name –n new_name   Except, this command option does NOT exist. ”   Since then I’ve... [More]

Tags:  7.1 gibson aix chris rendev

After updating my NIM master to AIX 7.1 TL2 SP1 (7100-02-01-1245), I noticed a problem. Whenever I installed a new AIX partition using NIM, the resources allocated to the NIM client were not being de-allocated, even though the installation was completing successfully. Also, if I tried to run my usual ‘NIM client reset’ script (below), the resources were still allocated.   #!/usr/bin/ksh # Reset a NIM client.   if [[ "$1" = "" ]] ; then   echo Please specify a NIM client to reset e.g. aixlpar1. else   if lsnim -l $1... [More]

Tags:  not nim working tl2 issue chris_gibson 7.1 aix resources de-allocate