[Ocfs2-users] Need Expert Comments - OS Upgrade

Tue May 29 23:15:01 PDT 2012

Dear Herbert, Just to update you that I have done testing RHEL Upgrade from
5.3 to 5.8 with OCFS2 and Oracle 11GR2 between two nodes in our local lab.
It was successful. The only I need to install OCFS2 rpm with is compatible
with kernel 194 (ocfs2-2.6.18-194.el5-1.4.7-1.el5.x86_64.rpm). Rest is all
OK. This bring much confidence in me and now am going for same activity on
production server shortly.

Regards,

Yuvrajsinh Chauhan || Sr. DBA || Telecom Practice-PSG

Elitecore Technologies Pvt. Ltd.

904, Silicon Tower || Off C.G.Road

Behind Pariseema Building || Ahmedabad || INDIA

[GSM]: +91 9727746022

From: Herbert van den Bergh [mailto:herbert.van.den.bergh at oracle.com] 
Sent: 15 May 2012 20:41
To: Yuvrajsinh Chauhan
Cc: ocfs2-users at oss.oracle.com
Subject: Re: [Ocfs2-users] Need Expert Comments - OS Upgrade

If by "Check File System" in step 5 you mean fsck, you can't run fsck on one
node while the other node has the filesystem mounted.  It may return
inconsistencies, but those may just be due to the other node making changes.
If you are just going to try to mount the filesystem, then that's fine.  If
you like, you can try mounting read-only first, to avoid doing any damage.
When it mounts fine read-only, you can change it to read-write.

Thanks,
Herbert.

On 5/15/12 2:07 AM, Yuvrajsinh Chauhan wrote: 

Herbert, Am following steps (Mention in Activity Steps Block) to upgrade OS
as well as OCFS2. Do let me know if anything is missing.  Thanks in Advance.

Current Deployment Architecture

Activity Steps

Node Name

RAC-NODE1

RAC-NODE2

	Node Name

RAC-NODE1

RAC-NODE2

Current Version

RHEL5.3

RHEL5.3

	Current Version

RHEL5.3

RHEL5.3

Kernel Version

2.6.18-128.el5

2.6.18-128.el5

	Kernel Version

2.6.18-128.el5

2.6.18-128.el5

OCFS2 Version

1.4 with Compatible Kernel

1.4 with Compatible Kernel

	OCFS2 Version

1.4 with Compatible Kernel

1.4 with Compatible Kernel

Status

ONLINE

ONLINE

	Status

DB-1 DOWN

ONLINE

Shared Storage

/ORASYS, /ORADATA, /VOTINGDISK, /ORAREDO

	Shared Storage

/ORASYS, /ORADATA, /VOTINGDISK, /ORAREDO

FS Type

Formatted with OCFS2

	1

Upgrade RHEL with 5.5 or 5.8

			2

Install OCFS2 RPM with Compatible Version

			3

Reboot RAC Node1

			4

Mount Shared Partition

			5

Check File System (In cluster or not)

			6

Start-up RAC DB-1

Status

ONLINE

			Shared Storage

/ORASYS, /ORADATA, /VOTINGDISK, /ORAREDO

If all goes well, I will perform rolling update on Node-II

From: Herbert van den Bergh [mailto:herbert.van.den.bergh at oracle.com] 
Sent: 14 May 2012 23:34
To: Yuvrajsinh Chauhan
Cc: ocfs2-users at oss.oracle.com
Subject: Re: [Ocfs2-users] Need Expert Comments - OS Upgrade

There's no need to do anything to the filesystems.  Later OCFS2 versions are
backward compatible with earlier versions.  I'm not sure if there were any
new features introduced in the latest OCFS2 version for EL5, but I'm pretty
sure that all OCFS2 1.4.* versions have the same network protocol, so you
can do a rolling update (install on node 1, reboot, install on node 2,
reboot) without having to unmount the fs on all nodes first.

Thanks,
Herbert.

On 05/14/2012 10:21 AM, Yuvrajsinh Chauhan wrote: 

Thanks Herbert for your reply. 

Few concern:

.         My shared partition is formatted with OCFS2 (128). Now if I update
Linux with may be 5.5 or 5.8, no need to format all partition again right ?
Because all my production data resides in that storage.

.         One more silly question: Can I upgrade OS one by one ? I mean
first I upgrade one node and then second ?. During first node upgrade, I
un-mount all shared partition and made available only to second node. I can
do similar activity vice-versa ?

Regards,

Yuvrajsinh Chauhan || CRESTEL || Sr. DBA

Elitecore Technologies Pvt. Ltd.

904, Silicon Tower || Off C.G.Road

Behind Pariseema Building || Ahmedabad 380 006

[M]: +91 9727746022

From: Herbert van den Bergh [mailto:herbert.van.den.bergh at oracle.com] 
Sent: 14 May 2012 21:39
To: Yuvrajsinh Chauhan
Cc: ocfs2-users at oss.oracle.com
Subject: Re: [Ocfs2-users] Need Expert Comments - OS Upgrade

First of all, why bother update  to 5.5, when you can update to 5.8?  Many
bugs have been fixed since 5.5.  Do you really want to run into those?

OCFS2 and the kernel have to be upgraded at the same time.  In other words,
you have to make sure you install both the kernel and the OCFS2 module that
goes with it at the same time, then you reboot into the new kernel with the
new OCFS2 module.  The easiest thing to do is to just run yum update, and
let it update to the latest package versions, and then install the OCFS2
package for the kernel that got installed.

Thanks,
Herbert.

On 5/14/12 1:26 AM, Yuvrajsinh Chauhan wrote: 

Dear OCFS2 Experts,

I required expert comments on my below scenario.

.         Oracle RAC Database 11gR2 is running on RHEL5.3 (OS Kernel Version
is 128). Database is in Production. We have used SAN for cluster file system
and all shared partition formatted with OCFS2 Version 128. As of now, it
seems to be fine. No issues received as of now.

.         We have business requirements. Upper managements wants to Upgrade
Linux OS. (Suggested Version is RHEL 5.5).

Now I want to know How should I go for above requirements.

.         Should I upgrade OS First or should I first Install OCFS2 RPM
compatible with 5.5 Kernel ?

.         Any impact on my existing storage ?

I need expert comments because I have not done such upgrade with OCFS2. 

Regards,

Yuvrajsinh Chauhan || CRESTEL || Sr. DBA

Elitecore Technologies Pvt. Ltd.

904, Silicon Tower || Off C.G.Road

Behind Pariseema Building || Ahmedabad 380 006 || INDIA

[GSM]: +91 9727746022

_______________________________________________
Ocfs2-users mailing list
Ocfs2-users at oss.oracle.com
http://oss.oracle.com/mailman/listinfo/ocfs2-users
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://oss.oracle.com/pipermail/ocfs2-users/attachments/20120530/e51070c7/attachment-0001.html 