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Performance analysis and monitoring for IBM SVC and Storwize

 


 



Name of the Solution:
Business Volume Qualicision
BVQ WEB Monitoring

 

 

BVQ offers a web monitoring interface based on the well know monitoring software Grafana.  The BVQ server installation includes Grafana and the BVQ plugin required for these two software to work together.

BVQ comes with a set of Grafana dashboards that allow you to monitor the cluster hardware down to the level of a particular VDisk and MDisk.


Cluster Overview with load and performance

This dashboard shows front-end volume (VDisk), back-end MDisk performance and further cluster information like CPU utilization in % for each node of the cluster,  node cache fullness and node port load.
The CPU load values and Node cache fullness show max threshold to better understand the meaning of the presented data.


Pict.: Cluster Overview dashboard shows front-end and back-end IO plus node CPU load, cache utilization and port performance.

  • Total Volume FRONT-END load

    High latency peaks typically indicate overload situations.

    The first chart shows aggregated average R&W IO rate and latency of all volumes related to the selected objects.

    • Events are displayed as vertical lines.



  • Total MDisk BACK-END load

    The second chart shows aggregated average R&W IO rate and latency of all MDisks related to the selected objects.

    • Events are displayed as vertical lines.

 

  • Total Node CPU Utilization
    The third chart shows the total utilization of Node CPUs: utilization of the most loaded CPU per interval.
    Limits: This should not reach a higher level than 90%.



 

Going deeper into the single Nodes - From an identified performance issue in the Node CPU utilization or on the Node Port Load


This dashboard shows node CPU % and Node port information. You can select to display only the data from one single node or different nodes together.



Pict.: Node Details with system CPU load and compression CPU load, plus Node port load per port and buffer credit wait results.


  • Total Node CPU system, Total Node CPU compression
    Shows CPU usage per node divided in system CPU% and compression CPU%.


  • Node port load
    shows load on a single node port - send and receiving are set appart into positive and negative directions.
    A single port can be selected from the list.


  • Node port BCW%
    shows blockages in the SAN measured by buffer credit wait%. The value should always be under 10%.


Going deeper into front-end (VDisk) and back-end (MDisk) - when a spike in performance is identified in the front-end or back-end

These two dashboards allow you to monitor and analyze load on single VDisks and MDisks.
The selection process to find the VDisk or MDisk is, first to select the cluster, then the managed disk group and finally the VDisk or MDisk out of the manage disk groups.
One can also decide to find a VDisk or MDisk using the text search tool.


Pict.: VDisks details showing IO and data rate + Latency and transfer latency.

Select one or more VDisks to display detailed performance data line by line for each selected VDisk.

  • VDisk performance IO/s and data rate MiB/s
    This is the IO R/W and data rate RW from the VDisk.



  • VDisk latency and Server transfer latency
    Shows the latency of the VDisk and the transfer latency of the Server using the VDisk.
    The transfer latency can show poor server performance or SAN FABRIC problems.

    More about transfer latency in the BVQ Library (BVQ customers only)





Pict.: Details of MDisks
showing IO and data rate and read and write latency.


Select one or more MDisks to display detailed performance data line by line for each selected MDisk.

  • MDisk performance IO/s and data rate MiB/s
    This is the IO R/W and data rate RW from the MDisk.



  • MDisk latency
    This is the latency for the MDisk.