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Introducing DRS DumpInsight

In an effort to provide a more insightful user experience and to help understand how vSphereDRS works, we recently released a fling:DRS Dump Insight.

DRS Dump Insight is a service portal where users can upload drmdump files and it provides a summary of the DRS run, with a breakup of all the possible moves along with the changes in ESX hosts resource consumption before and after DRS run.

Users can get answers to questions like:

  • Why did DRS make a certain recommendation?
  • Why is DRS not making any recommendations to balance my cluster?
  • What recommendations did DRS drop due to cost/benefit analysis?
  • Can I get all the recommendations made by DRS?

Once the drmdump file is uploaded, the portal provides a summary of all the possible vMotion choices DRS went through before coming up with the final recommendations.

The portal also enables users to do What-If analysis on their DRS clusters with options like:

  • Changing DRS Migration Threshold
  • Dropping affinity/anti-affinity rules in the cluster
  • Changing DRS advanced options

 

The post Introducing DRS DumpInsight appeared first on VMware VROOM! Blog.

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DRS Lens – A new UI dashboard for DRS

DRS Lens provides an alternative UI for a DRS enabled cluster. It gives a simple, yet powerful interface to monitor the cluster real time and provide useful analyses to the users. TheUI is comprised ofdifferent dashboards in the form of tabs for each cluster being monitored.

Cluster Balance

Dashboardshowing the variations in the cluster balance metric plotted over time with DRS runs. This shows how DRS reacts to and tries to clear cluster imbalance every time it runs.

VM Happiness

This dashboard shows VM happiness for the first time in a UI. This chart shows the summary of total VMs in the cluster that are happy and those that are unhappy based on the user defined thresholds. Users can then select individual VMs to view performance metrics related to its happiness, like CPU ready time and memory swapIn rate.

vMotions

This dashboard provides a summary of vMotions that happened in the cluster over time. For each DRS run period, there will be a breakdown of vMotions as DRS-initiated and user-initiated. This helps users see how actively DRS has been working to resolve cluster imbalance. It also helps to see if there are vMotions outside of DRS control, which may be affecting cluster balance.

Operations

This dashboard tracks different operations (tasks, in vCenter Server) that happened in the cluster, over time. Users can correlate information about tasks from this dashboard against DRS load balancing and its effects from the other dashboards.

 

Users can download DRS Lens from VMware flings website.

The post DRS Lens - A new UI dashboard for DRS appeared first on VMware VROOM! Blog.

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DRS Cluster Resource Management with Reservation and Shares

Resource management in vSphere is very robust and sophisticated. It provides settings like reservation, limits and shares (a.k.a. RLS), which can be applied on virtual machines (VMs) and resource pools. These settings can be used as knobs to isolate resources, prioritize them, or to guarantee availability of resources to VMs in a cluster. Our customers have often asked about how these settings impact availability of resources for a VM.

Recently we published a white paper based on our study, to explain how reservation and shares can impact resource availability for VMs when they are applied on VMs versus when they are applied on resource pools. In the paper, we also share some general guidelines on when and how these settings can be used.

The post DRS Cluster Resource Management with Reservation and Shares appeared first on VMware VROOM! Blog.

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