Host Storage Assessment report details in Veritas Operations Manager Enterprise Server 5.0

Article:HOWTO77580  |  Created: 2012-08-10  |  Updated: 2012-09-05  |  Article URL http://www.symantec.com/docs/HOWTO77580
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Host Storage Assessment report details in Veritas Operations Manager Enterprise Server 5.0

The Veritas Operations Manager Enterprise Server Host Storage Assessment report shows the overall utilization percentage for each host and how hosts use storage at each level:

  • LUN

  • Server virtualization

  • Volume manager

  • Disk group

  • Volume

  • File system

  • Database

The Host Storage Assessment report helps you identify where most of the free storage is present.

To reclaim storage, start by assessing which hosts are good candidates for reclamation. Check the level at which the most unused storage capacity exists (LUN, volume manager, disk group, file system, or database). From the Veritas Operations Manager Enterprise Server Home page, go to Sample Reports > Reclamation > Host Storage Assessment. You see the Host Storage Assessment report. There, you can include or exclude virtual hosts.

Veritas Operations Manager Enterprise Server detects storage utilization for file systems and the database products that are compatible with Veritas Operations Manager Enterprise Server. Utilization percentages are calculated differently depending on what Veritas Operations Manager Enterprise Server can detect.

Table: Utilization percentage calculations for physical hosts and virtual hosts shows how utilization percentages are calculated for physical hosts and virtual hosts.

Table: Utilization percentage calculations for physical hosts and virtual hosts

If Veritas Operations Manager Enterprise Server has

Utilization percentage is

No file system or database visibility

0

Visibility to the file system level

a/b

where:

a = Storage that file systems consume

b = Total allocated capacity

Full visibility

(a + b) / c

where:

a= Storage that file systems consume (not including the capacity that applications consume)

b = Storage that databases consume

c = Total allocated capacity

Table: Utilization percentage calculations for virtualization servers shows how utilization percentages are calculated for virtualization servers, such as ESX servers and Solaris global zones.

Table: Utilization percentage calculations for virtualization servers

If Veritas Operations Manager Enterprise Server has

Utilization percentage is

Visibility to the file system level (ESX servers)

a/b

where:

a = Storage that ESX server virtualization layers consume

b = Total allocated capacity

Visibility to the file system level (Solaris global zones)

(a + b) / c

where:

a= Storage that file systems consume, if the file systems are not exported

b = Exported storage

c = Total allocated capacity

Full visibility (Solaris global zones)

(a + b + c) / d

where:

a= Storage that file systems consume, if the file systems are not exported

b = Storage that databases consume

c = Exported storage

d = Total allocated capacity

Use the Host Storage Utilization Grouping to target hosts with low as well as high utilization. To look for the least used hosts with the highest available capacity, check the upper-left corner of the grouping. These hosts have the highest overall capacity and are the most underused (with under 30% capacity in use).

The Distribution of Hosts bar chart shows the level at which the largest number of hosts have unused capacity. Unused capacity can be at the volume manager, LUN, or file system level. This chart also breaks down the host utilization by percentage of unused space for each level.

If a level has a large number of hosts with a lot of unused space (70-100%), examine that level in more detail. To examine the level in more detail, use the host-level reclamation reports. Go to Sample Reports > Reclamation . Then, click the link for the relevant host-level reclamation report. For example, if there is a large number of hosts with over 70% unused space at the LUN level, go to Sample Reports > Reclamation > Allocated LUNs Reclamation. There you see the specific LUNs that have unused space.

The Distribution of Hosts bar chart breaks capacity into unused percentage watermarks (such as 0-30%, 30-70%, and 70-100%). Select upper and lower watermarks from the Lower Water Mark and Upper Water Mark drop-down lists to filter by that watermark range.

The Hosts table provides information about all of the hosts in your environment. Table: Hosts table explains the columns in that table.

Table: Hosts table

This column

Lists

Host

A list of the hosts in your environment.

Total Allocated

The total block storage that a host can access. For ESX servers and non-global zones, Total Allocated Capacity also includes the file storage that the host can access.

% Host Utilization

The overall storage utilization on a host. This percentage includes the total allocated storage capacity that is in use by LUNs, virtualization servers, volume managers, and databases.

% LUN Capacity Unused

The percentage of unused storage capacity on the LUNs associated with a host.

% Server Virt. Capacity Unused

The percentage of unused storage capacity on the virtualization servers.

% Volume Manager Capacity Unused

For the volume managers that are associated with a host, the percentage of unused storage capacity.

% File System Capacity Unused

For the file systems that are associated with a host, the percentage of unused storage capacity.

% Database Capacity Unused

For the databases that are associated with a host, the percentage of unused storage capacity.

You can modify the information in the Hosts table by doing any of the following:

  • Show the results for a specific host, or for all hosts by selecting an item in the Hosts drop-down list.

  • Filter the results of the host by selecting items in the Hosts with drop-down list.

See Sample report descriptions in Veritas Operations Manager Enterprise Server 5.0


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