Solved

AIX HACMP file system

Posted on 2014-11-22
2
379 Views
Last Modified: 2014-11-24
Hi,

I have a quick question regarding hacmp cluster sysetm on AIX.  We have installed VCS on AIX and it does varyoff the VG on node1 and varyon the VG on node2 and mount the file system, when we do fail over.  How does it work on HACMP ?
Does  it export the VG and import into node2 or use the same method as VCS ?
0
Comment
Question by:mokkan
2 Comments
 
LVL 68

Accepted Solution

by:
woolmilkporc earned 500 total points
ID: 40460062
Hi,

I think you're talking about PowerHA which is the new name of (former) HACMP since version 6.something?

Anyway, PowerHA uses the export/import method only when there is a difference between VG timestamps which means that the VG information held on the participating nodes is not consistent.

If consistenty is guaranteed PowerHA will just varyon the VG on the failover target, having made sure beforehand that the source node is either dead or has successfully varied off the VG.
This is verfied by means of several heartbeat communication paths (with PowerHA 7 in fact using all available interfaces automatically) , be it via network, asynchronous line, legacy disk heartbeat or the new  common SAN heartbeat feature (CAA repository disk on PowerHA 7, not on HACMP!)

VG information can/will become inconstent when VGs are not concurrent-capable and changes were made to VG or LV metadata without having taken further action like "importvg -L" ("learn").

Please note that "importvg -L" will synchronize VG information on nodes, but will not update the timestamp recorded by HACMP/PowerHA. There is a way, however, to update this timestamp manually (see "clvgdats").
0
 

Author Closing Comment

by:mokkan
ID: 40462355
thank you very much
0

Featured Post

How to run any project with ease

Manage projects of all sizes how you want. Great for personal to-do lists, project milestones, team priorities and launch plans.
- Combine task lists, docs, spreadsheets, and chat in one
- View and edit from mobile/offline
- Cut down on emails

Join & Write a Comment

Using libpcap/Jpcap to capture and send packets on Solaris version (10/11) Library used: 1.      Libpcap (http://www.tcpdump.org) Version 1.2 2.      Jpcap(http://netresearch.ics.uci.edu/kfujii/Jpcap/doc/index.html) Version 0.6 Prerequisite: 1.      GCC …
It’s 2016. Password authentication should be dead — or at least close to dying. But, unfortunately, it has not traversed Quagga stage yet. Using password authentication is like laundering hotel guest linens with a washboard — it’s Passé.
Learn several ways to interact with files and get file information from the bash shell. ls lists the contents of a directory: Using the -a flag displays hidden files: Using the -l flag formats the output in a long list: The file command gives us mor…
This demo shows you how to set up the containerized NetScaler CPX with NetScaler Management and Analytics System in a non-routable Mesos/Marathon environment for use with Micro-Services applications.

746 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now