Devops Mojo

AIX Interview questions:  Set 1: 1. How to add route persistently in AIX? 3. Firmware upgrade - disruptive or not ? How to check that? 4. Commands to tune kernel perimeters. 5. How to make those kernel parameters permanent? 6. Diff between EtherChannel and Link aggregation. 7. VIO migration steps. 8. What is BB relocation policy and is the default value? 9. How you will perform AIX migration using an ISO image? Set 2: 1. What is meant by freezing and unfreezing in a cluster? 2. When you migrate the HACMP nodes to a new DC, what configuration changes you need to make to the HA to work? 3. How you will add a new disk to a RG? 4. How you will check the VIO servers from an LPAR? 5. How you will upgrade VIO servers? 6. To boot a NIM client from NIM master, what you need to do at the NIM master? 7. What is the difference between link aggregation and ether channel adapter? 8. What are the backup tools used in your environment? 9. How you will perform SEA failover? 10. What are all the thi...

  NIM migration with mksysb and alt_disk_mksys: On client: 1. Update alt_disk filesets to new version. 2. Unmirror rootvg and free up the disk. 3. Create mksysb image locally on NIM client and then copy it to NIM server. On NIM master: 1. Create mksysb resource from mksysb 2. Migrate mksyb to the new AIX level 3. Copy this migrated mksysb image to the NIM client. On Client: 1. Restore that migrated mksysb image to the free disk using alt disk 

Troubleshooting AIX migration ( from 6.1 to 7.1 ) I was migrating my AIX server from 6.1 to 7.1. Since, the customer had only a couple AIX servers to migrate, they wanted us to migrate using DVD ( not nimadm ).  Hands and eyes team in the data centre loaded the DVD in the drive. I have booted the server from the installation DVD and chosen migration installation mode. Everything went fine. LED panel is displaying "000" and the system came up. But after reboot, just before showing the login prompt, my system started to reboot again. Alas!! what is this? Fine. Everything happens for a reason. I booted my system from DVD again in maintenance mode. Checked the filesystem consistency. Everything looked fine! Then who is the culprit? Again I tried to boot the server, but he was going on a reboot loop. Ok, let me boot again in maintenance mode. My instinct says that the culprit should be in /etc/inittab entries.  I prepared for an encounter with the inittab. I have taken three copie...