Host Port - Read Latency (ms)

HP.EVA.Host.Port.ReadLatency.CollectionRule (Rule)

Knowledge Base article:

Summary

Read Latency

Configuration

Read latency is the elapsed time from when the EVA receives a read request until it returns completion of that request to the host client over the EVA host port. This time is an average of the read request latency for all virtual disks accessed through this port and includes both cache hits and misses.

Element properties:

Target	EVA.Host.Port
Category	PerformanceCollection
Enabled	True
Alert Generate	False
Remotable	True

Member Modules:

ID	Module Type	TypeId	RunAs
DS	DataSource	EVA.HostPort.PerformanseDataSource	Default
Mapper	ConditionDetection	System.Performance.DataGenericMapper	Default
WriteToDB	WriteAction	Microsoft.SystemCenter.CollectPerformanceData	Default
WriteToDW	WriteAction	Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData	Default

Source Code:

<Rule ID="HP.EVA.Host.Port.ReadLatency.CollectionRule" Enabled="true" Target="EVA.Host.Port" ConfirmDelivery="true" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>PerformanceCollection</Category>

  <DataSources>

    <DataSource ID="DS" TypeID="EVA.HostPort.PerformanseDataSource">

      <Name>$Target/Property[Type="EVA.Host.Port"]/PortName$</Name>

    </DataSource>

  </DataSources>

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

    <ObjectName>HP EVA Host Port</ObjectName>

    <CounterName>Read Latency (ms)</CounterName>

    <InstanceName>$Target/Property[Type="EVA.Host.Port"]/PortName$</InstanceName>

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

  </ConditionDetection>

  <WriteActions>

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

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

  </WriteActions>

</Rule>