Defining device groups and LUN service levels

Table of Contents

Overview

You use groups to group devices such as hosts, switches, arrays, and storage groups. Groups are also used to define LUNs with similar performance characteristics as a service level.

Device tagging provides a way to identify different devices by some common association, such as by a customer identifier or location. There are two ways you can create groups:

You can create sub groups, but they will not inherit the rules of the parent group.

Service levels are defined by rules that match characteristics such as array type, disk technology, disk size, and RAID protection. Discovered LUNs that match the rules for a given service level will be tagged as that service level. There are 11 predefined service levels: System, Pool Contributor, Platinum, Gold, Silver, Bronze, Custom1, Custom2, Custom3, Fast VP, and Other. The predefined service levels can edited to customize the service level definition. Nested service levels are not permitted.

Service level tagging currently supports the following technologies:

Rules are applied to each LUN in the order they are listed. The first matching service level is the one that is assigned to the LUN. If you created a new rule and you do not see your LUNs at the expected place, a rule higher up in the order of rules probably matched it.

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Creating a device group automatically using rules

Using the Dynamic Members tab, you define rules that are used to match the devices that will be included in the group.

Procedure

  1. Navigate to Centralized Management.
  2. Click Groups Management.
  3. Click Device Tagging.
  4. Click Create.
  5. In Group Name, enter a name for the group.
  6. Click the Dynamic Members tab.
    Create Device Group

    Create Device Group

  7. For each rule, select a property, an operation, and a value.
    For example, to tag all incoming raw values that have the devtype property set to host, you would create the following rule: Device name Contains host.
  8. Add as many rules as you need to the rule set.
  9. Optionally, click Click to show query.
    This enables you to copy the query to paste into other fields that accept strings. Also, you can use feature to see how queries are built in real time to help you understand the query syntax.
  10. Click Save.
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Creating a device group manually

Using the Static Members tab, you select devices manually to add to a group.

Procedure

  1. Navigate to Centralized Management.
  2. Click Groups Management.
  3. Click Device Tagging.
  4. Click Create.
  5. In Group Name, enter a name for the group.
  6. Click the Static Members tab.
    Create Device Group

    Create Device Group

  7. Use Type or Source Group to limit the list of your discovered devices.
    • Type sorts your discovered devices according to the type of device.
    • Source Group displays the devices already contained in an existing group.
  8. Select the devices you want to add to the group and click Add to group.
  9. Click Save.
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Editing a service level

You can modify and add service level rules to custom define your service level tiers.

Rules evaluate whether or not one or more properties of an incoming raw value match defined values. For example, if an incoming raw value from a collector has a component type property with a value of "LUN" and a disk technology property that ends with "flash drive" then that raw value is tagged as a Platinum service level.

Procedure

  1. Navigate to Centralized Management.
  2. Click Groups Management.
  3. Click Service Level by LUNs.
  4. Click a service level.
  5. Click Edit.
    The Edit Service Level dialog is displayed.
  6. Add or modify rules to define the service level tier.
    You can use SQL patterns instead of string comparisons to define a match.
  7. Optionally, click Click to show query.
    This enables you to copy the query to paste into other fields that accept strings. Also, you can use feature to see how queries are built in real time to help you understand the query syntax.
  8. Click Save.
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