Cluster 6.1 storage move Post: 302949019

Sponsored Content

Operating Systems AIX Cluster 6.1 storage move Post 302949019 by bakunin on Monday 6th of July 2015 05:38:34 AM

07-06-2015

Registered User

Quote:

Originally Posted by snchaudhari2

The plan that our architect implemented in summary is :
shutdown the source servers,
replicate the old luns with new luns,
remove the old luns and allocate new luns.
Bring the servers up.

The problem with this plan is:

1. the new LUNs will have different WWNs and therefore the volume group information of the system will not be consistent. Basically you will have to build the cluster resources anew.

2. You need a (complete) downtime to do this as your storage guy planned. What i described will need no downtime at all. To reconfigure all the VGs and RGs plan at least 1-2 hours (30 min to actually do it, 30-90 min in contingency) and you will not know if everything went well until you do an "extended verification and synchronisation". (Technically speaking, you will be creating new VGs, which just happen to have the same name as the old ones and you will build new ressource groups from them, which happen to have the same name as the old ones.)

I hope this helps.

bakunin

bakunin

View Public Profile for bakunin

Find all posts by bakunin

5 More Discussions You Might Find Interesting

1. Filesystems, Disks and Memory

Veritas Storage Foundation basic and Core cluster solaris 10 release 7 install

After much hitting my head to the wall with this meesages root@crasher /workzone/dvd4_sfb-sol_x64]#./installer -verbose -installonly 5.0MP3 Installation Program Copyright (c) 2008 Symantec Corporation. All rights reserved. Symantec, the Symantec...

2. UNIX for Advanced & Expert Users

Any ideas how to accomplish this storage move?

We have a datacenter in another part of the country with about a 100Mb WAN between that datacenter and the local datacenter. The remoted datacenter has about 20TB of data on roughly 75 servers that all must be moved to this datacenter with minimal downtime. Please help me come up with the best way...

3. Solaris

Sun Cluster/Storage question

Hi Bros, I am a newbie to this cluster environment...my workplace is a mess of Sun solaris server, oracle database, Cisco switch, router, MS Server, Windows PC..so and so..now my boss ask me to come out with a procedure for maintenance of storage array in our sun cluster environment..I read few...

4. Red Hat

Storage Cluster ?

Hi I want the Sync file server together (at the moment) All server to a web server What can I do to update Joomla or WordPress files even when taken together are equal Databases together are replicated What is the solutions ? Thanks

5. Linux

Move OS to storage disk

Hi We have RHEL 7.3 running from local disk and we want to move it to storage. I am unable to find any proper procedure to do this activity. Please help.

LEARN ABOUT HPUX

fcd_disable_mgmt_lun

fcd_disable_mgmt_lun(5) 					File Formats Manual					   fcd_disable_mgmt_lun(5)

NAME

       fcd_disable_mgmt_lun - select whether or not management luns are discovered in the legacy representation of mass storage devices

VALUES

   Failsafe
   Default
   Allowed values
       Enable discovery of management luns for array devices.

       Disable discovery of management luns for array devices.

   Recommended values
DESCRIPTION

       Management  luns  provide  the means to access the control ports of Fibre Channel disk arrays.  They are represented in both the legacy and
       the agile view of storage devices.  The legacy representation of a management lun is typically created under a separate	virtual  extension
       bus node.  The entry for a legacy management lun looks like this:

       On  a  system with a large number of storage devices connected, creation of management luns can result in an insufficient number of virtual
       extension buses for the legacy representation of data luns.  Since the number of extension buses on  a  system  is  limited  to	256,  luns
       requiring  virtual extension buses above 256 will be unusable through legacy device special files.  Disabling the discovery and creation of
       management luns will free up virtual extension buses for use by data luns.

       The default value for this tunable is

   Who Is Expected to Change This Tunable?
       System administrators who expect to use a large number of storage devices requiring more than 256 extension  buses  through  legacy  device
       special files.

   Restrictions on Changing
       Changes to this tunable take effect immediately.  However, existing management luns will not be removed.

   When Should the Tunable Be Turned On?
       This tunable should be turned on when the system runs out of extension buses for configuring the legacy representation of data luns.

   What Are the Side Effects of Turning the Tunable Off?
       None.

   When Should the Tunable Be Turned Off?
       When the functionality provided by the management lun is desired.

   What Are the Side Effects of Turning the Tunable On?
       Existing management luns in the legacy representation will show up in the state.

   What Other Tunables Should Be Changed at the Same Time?
       None.

WARNINGS

       All  HP-UX kernel tunable parameters are release specific.  This parameter may be removed or have its meaning changed in future releases of
       HP-UX.

       Installation of optional kernel software, from HP or other vendors, may cause changes to tunable  parameter  values.   After  installation,
       some  tunable  parameters may no longer be at the default or recommended values.  For information about the effects of installation on tun-
       able values, consult the documentation for the kernel software being installed.	For information about optional kernel  software  that  was
       factory installed on your system, see at

AUTHOR

       was developed by Hewlett-Packard Company.

SEE ALSO

       ioinit(1M), ioscan(1M), kctune(1M).

							     Tunable Kernel Parameters					   fcd_disable_mgmt_lun(5)