Virtual Disk - Read Hit Req

HP.EVA.Virtual.Disk.ReadHitReq.CollectionRule (Rule)

Knowledge Base article:

Summary

Read Hit Req/s

Configuration

This counter reports the rate at which read requests are satisfied from the EVA cache memory. Data will be in the EVA read cache because of a previous cache miss or a prefetch operation generated by a sequential read data stream.

Element properties:

Target	EVA.VirtualDisk
Category	PerformanceCollection
Enabled	True
Alert Generate	False
Remotable	True

Member Modules:

ID	Module Type	TypeId	RunAs
DS	DataSource	EVA.Virtual.Disk.Performance.DataSource	Default
DM	ConditionDetection	System.Performance.DataGenericMapper	Default
WriteToDB	WriteAction	Microsoft.SystemCenter.CollectPerformanceData	Default
WriteToDW	WriteAction	Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData	Default

Source Code:

<Rule ID="HP.EVA.Virtual.Disk.ReadHitReq.CollectionRule" Enabled="true" Target="EVA.VirtualDisk" ConfirmDelivery="true" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>PerformanceCollection</Category>

  <DataSources>

    <DataSource ID="DS" TypeID="EVA.Virtual.Disk.Performance.DataSource">

      <Name>$Target/Property[Type="System!System.Entity"]/DisplayName$</Name>

    </DataSource>

  </DataSources>

  <ConditionDetection ID="DM" TypeID="Performance!System.Performance.DataGenericMapper">

    <ObjectName>HP EVA Virtual Disk</ObjectName>

    <CounterName>Read Hit Req</CounterName>

    <InstanceName>$Target/Property[Type="EVA.VirtualDisk"]/LUNName$</InstanceName>

    <Value>$Data/Property[@Name='ReadHitReq']$</Value>

  </ConditionDetection>

  <WriteActions>

    <WriteAction ID="WriteToDB" TypeID="SystemCenter!Microsoft.SystemCenter.CollectPerformanceData"/>

    <WriteAction ID="WriteToDW" TypeID="SCDW!Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData"/>

  </WriteActions>

</Rule>