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musars-fI4pJ

3 Posts

3056

April 13th, 2009 07:00

LUN Reporting for shared LUNS (storagescope)

Hi,

I wonder if there is a way to report the LUNs which are shared between hosts (some are cluster some not) as unique LUNs. When i try to report LUNS according to hosts although they are same LUNS it gives different LUNS in total.

Regards,
Mustafa

Butterfly2

17 Posts

April 14th, 2009 08:00

1. Create user defined group in ECC console
2. Put the hosts that have shared luns in to this newly created group
3. Run ETL
4. Check host by group report, or host group in query builder. You will find that at the group level, luns are calculated based on unique luns.

In query builder, there are several ways you can find shared luns:
1. Host shared device
2. Device allocation

jliu2

1 Rookie

 • 

82 Posts

April 13th, 2009 08:00

I'm running into the exact same issue
any suggestions would be appreciated

musars-fI4pJ

3 Posts

April 15th, 2009 06:00

Hello SarahXu,

First of all thnx for your reply.

As you said i created a group (mustafa_test) and put the hosts (just two hosts (host1, host2) which shares luns) into that group.

Then, i went to storage scope, select "Analysis-->Reports-->Built-in/CustomReports", checked the "Hosts By Group..." report and clicked on "run report" and i just gave me nothing.

Is there something i got wrong.

My storage Scope Version is 6.0.0.0.650.

Best Regards,
Mustafa

BarryR1

16 Posts

April 15th, 2009 07:00

Hi Mustafa,
In Sarah's reply she stated to run ETL.

Without running ETL, StorageScope will not see any changes you made using ECC Console.

You can run it manually by going to StorageScope and choosing Utilities->Settings->ETL Scheduler and clicking "Run Now".

musars-fI4pJ

3 Posts

April 16th, 2009 06:00

thnx for your helps.

Mustafa.

toddn1

4 Posts

July 30th, 2009 09:00

Also, another followup. When I tested this, I put the 2 cluster nodes in my test group and ran the report. It shows allocated storage as 16TB, 8TB per node - which is double. There is only 8TB allocated. Since one node doesn't have control of the disk, that node shows as 0 byte used, so any reports I run make it look like there is 8TB of space which could be reclaimed from the cluster. Any ideas?

toddn1

4 Posts

July 30th, 2009 09:00

For microsoft clusters, is this step necessary? One would think that the host agent would know discover the cluster information automatically. Our environment has hundreds of cluster nodes, I'd hate to do this for all of them to get something that should be automatic.

AnuShivnath

41 Posts

July 30th, 2009 11:00

Which report did you run? Did you run the "Host By Group" built in query?

AnuShivnath

41 Posts

July 30th, 2009 11:00

We are working towards a solution, to report on shared storage which is cluster independent. With this solution, servers which are sharing storage will be dynamically added to a grouping structure and capacities such as Allocated,Accessible will be reported for those groups. There will not be any need for customersto create user defined groups in CC console and add cluster nodes into them, to report shared storage after this solution is implemented.

toddn1

4 Posts

August 3rd, 2009 07:00

yes, I ran the hosts by group built in report. That report shows 8TB allocated to each host, rather than a single 8TB allocation. Am I missing something? How is it supposed to work?

AnuShivnath

41 Posts

August 4th, 2009 07:00

It should display 8TB for the group that both the clustered hosts are in. We have an engineering ticket open to look at this. It may be possible that StorageScope did not have enough data to infer that these hosts are sharing the same LUNs. However once engineering finds out the root cause of this issue, I will post it.

kclark14

2 Posts

June 3rd, 2010 18:00

Is there any update to getting a simple cluster report of hosts that share devices ? It seems a table in storage scope db can be used to determine number of HBA's that have access to the device and add that to any host defined by that HBA. 

AnuShivnath

41 Posts

June 7th, 2010 10:00

In STS UB8 a new feature has been introduced called "Shared Storage" where in the application  automatically detects hosts, which are sharing  common devices.  Through the application you can then, choose to distribute the shared capacity to one host or equally amongst the hosts in a cluster.   From a array perspective you will be able to find out how much of the host allocated capacity is shared as well.    I have attached some screenshots which will give you a preview of what is being made available.    To obtain this information, it is not necessary for one to add hosts part of a cluster into a user defined group, neither is it dependent on a particular cluster software such as Veritas or MCS being available on the Host. 

Anu Shivnath

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