EVA Tunnel Round Trip Delay

EVA.Tunnel.Round.Trip.Delay (Rule)

Knowledge Base article:

Summary

Round Trip Delay

Configuration

The Round Trip Delay counter shows the average time in milliseconds during the measurement interval for a signal (ping) to travel from source to destination and back again. It includes the intrinsic latency of the link round trip time and any queuing encountered from the workload. Thus, the Round Trip Time counter measures the link delay if there is no data flow between source and destination. If there is replication traffic on the link, then the ping can be queued behind any data transmissions already in process, thus increasing round trip delay. If the destination controller is busy, then the round trip time is extended accordingly. Round trip delay is reported for each active tunnel for both local and remote systems. A value of 10,000 is reported when the tunnel is initially opened and then is updated if successful pings are executed. A value of 10,000 is also shown for any tunnel interrupted by a link problem. Round trip delay is reported for all open tunnels, whether active or inactive.

Element properties:

Target	EVAPerformanceMonitor
Category	PerformanceCollection
Enabled	True
Alert Generate	False
Remotable	True

Member Modules:

ID	Module Type	TypeId	RunAs
DS	DataSource	Microsoft.Windows.TimedScript.PerformanceProvider	Default
WriteToDB	WriteAction	Microsoft.SystemCenter.CollectPerformanceData	Default
WriteToDW	WriteAction	Microsoft.SystemCenter.DataWarehouse.PublishPerformanceData	Default

Source Code:

<Rule ID="EVA.Tunnel.Round.Trip.Delay" Enabled="true" Target="EVAPerformanceMonitor" ConfirmDelivery="false" Remotable="true" Priority="Normal" DiscardLevel="100">

  <Category>PerformanceCollection</Category>

  <DataSources>

    <DataSource ID="DS" TypeID="MicrosoftWindowsLibrary6062780!Microsoft.Windows.TimedScript.PerformanceProvider">

      <IntervalSeconds>300</IntervalSeconds>

      <SyncTime>00:01</SyncTime>

      <ScriptName>EVAPerf_Tunnel_Round_Trip_Delay.vbs</ScriptName>

      <Arguments/>

      <ScriptBody><Script><![CDATA[

' Extract tunnel statistics

'

'

'Time,Ctlr,Tunnel Number,Host Port,Source ID,Dest. ID,Round Trip Delay (ms),Copy Retries per second,Write Retries per second,Copy In MB/s,Copy Out MB/s,Write In MB/s,Write Out MB/s,Free Copy Resources,Free Write Resources,Free Command Resources,Node

'



SetLocale("en-us")

Wscript.Sleep 15000

linenumber=0

FileName = "C:\temp\EVAPERF_drt.csv"

Set fso = CreateObject("Scripting.FileSystemObject")

Set oAPI = CreateObject("MOM.ScriptAPI")

Const ForReading = 1



If fso.FileExists(FileName) = 0 Then

	wscript.echo "File not found."

	wscript.quit

End If



Set oFile = fso.GetFile(FileName) 



Set oStream = oFile.OpenAsTextStream(ForReading, TristateUseDefault) 



Set propertyBag = oAPI.CreatePropertyBag()



Do While Not oStream.AtEndOfStream

      sRecord=oStream.ReadLine

      if linenumber <> 0 and sRecord <> "" Then

      	tmp = split(sRecord,",")

      	value = tmp(6)

		name =  tmp(16) & ":" & tmp(1) & ":" & tmp(3) & ":" & tmp(2)





    propertyBag.AddValue "Name", name

    propertyBag.AddValue "Value", value

    oAPI.AddItem(propertyBag)

    End If

    linenumber = linenumber+1

    Loop

    oStream.Close

    If name ="" Then

    Set propertyBag = oAPI.CreatePropertyBag()

    propertyBag.AddValue "Name", "No DR Groups Found"

    propertyBag.AddValue "Value", 0

    oAPI.AddItem(propertyBag)

    End if



    oAPI.ReturnItems



  ]]></Script></ScriptBody>

      <TimeoutSeconds>60</TimeoutSeconds>

      <ObjectName>HP EVA Tunnel Statistics</ObjectName>

      <CounterName>Round Trip Delay(ms)</CounterName>

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

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

    </DataSource>

  </DataSources>

  <WriteActions>

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

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

  </WriteActions>

</Rule>