AHV中的Acropolis动态调度

  • 2021年3月13日
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  • raaji Nutanix员工
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Acropolis Dynamic Scheduling主动监控nutanix集群在一段时间内的任何计算和存储I/O竞争或热点。当ADS检测到问题时，会创建迁移计划，消除集群中的热点，并将虚拟机从一台主机迁移到另一台主机。

我们可以从Prism Element web控制台的任务仪表板监视VM迁移任务

以下是ADS的优点

  • ADS根据VM配置改进了VM的初始位置

  • Nutanix卷使用ADS来平衡外部可用的iSCSI目标的会话


默认情况下，ADS是启用的，Nutanix建议保持此功能为启用状态。

ADS监控以下功能:

  • 虚拟机CPU利用率:每个guest虚拟机CPU占用率的总和。

  • 存储CPU利用率:存储控制器(Stargate)每个虚拟机或iSCSI目标的CPU利用率。

ADS不监视内存和网络使用情况

Lazan是AHV集群中的ADS服务。AOS在集群主机中选择一个Lazan管理器和Lazan求解器，有效地管理ADS操作

Lazan每15分钟运行一次，并分析至少这段时间内的资源使用情况。AHV主机的资源利用率在15分钟内保持在>的85%。

Lazan触发迁移任务来移除热点

使广告:

如果已禁用ADS特性，需要重新启用ADS特性，请执行以下操作步骤

  • 使用SSH登录到集群中的控制虚拟机

  • 使广告:nutanix@CVM$ acli ads.update enable=true

即使禁用该功能后，对争用或热点的检查也会在后台运行，如果检测到任何异常，则会在警报仪表板。但是ADS并没有采取任何行动来解决争议。您需要手动采取补救措施，或者您可以启用该功能。

Raaji
Acropolis Dynamic Scheduling proactively monitors the nutanix cluster for any compute and storage I\/O contentions or hotspots over a period of time. If ADS detects a problem, ADS creates a migration plan that eliminates hotspots in the cluster and migrates VMs from one host to another.<\/span><\/p>

\u00a0<\/p>

We can monitor VM migration tasks from the Task dashboard of the Prism Element web console<\/span><\/p>

\u00a0<\/p>

Following are the advantages of ADS<\/span><\/p>

  • \t

    ADS improves the initial placement of the VMs depending on the VM configuration<\/span><\/p>\t<\/li>\t

  • \t

    Nutanix volumes uses ADS for balancing sessions of the externally available iSCSI targets<\/span><\/p>\t<\/li><\/ul>


    \u00a0<\/p>

    By default, ADS is enabled and Nutanix recommends to keep this feature enabled.<\/span><\/p>

    \u00a0<\/p>

    ADS monitors the following features:<\/span><\/p>

    \u00a0<\/p>

    • \t

      VM CPU Utilization: Total CPU usage of each guest VM.<\/span><\/p>\t<\/li>\t

    • \t

      Storage CPU Utilization: Storage Controller (Stargate) CPU usage per VM or iSCSI target.<\/span><\/p>\t<\/li><\/ul>

      \u00a0<\/p>

      ADS does not monitor memory and networking usage<\/span><\/p>

      \u00a0<\/p>

      Lazan is the ADS service in an AHV cluster. AOS selects a Lazan manager and Lazan solver among the hosts in the cluster to effectively manage ADS operations<\/span><\/p>

      \u00a0<\/p>

      Lazan runs every 15 minutes and analyzes the resource usage for at least that period of time. If the resource utilization of an AHV host remains >85% for the span of 15 minutes.\u00a0<\/span><\/p>

      Lazan triggers migration tasks to remove the hotspot<\/span><\/p>

      \u00a0<\/p>

      Enabling ADS:<\/strong><\/p>

      \u00a0<\/p>

      If you have disabled the ADS feature and want to enable the feature, perform the following procedure<\/span><\/p>

      \u00a0<\/p>

      • \t

        Log on to a controller VM in your cluster with SSH<\/span><\/p>\t<\/li>\t

      • \t

        Enable ADS: <\/span>nutanix@CVM$ acli ads.update enable=true<\/span><\/p>\t<\/li><\/ul>

        Even after you disable the feature, the checks for the contentions or hotspots run in the background and if any anomalies are detected, an alert is raised in the <\/span>Alerts<\/strong> dashboard. However, no action is taken by ADS to solve the contentions. You need to manually take the remedial actions or you can enable the feature.<\/span><\/p>

        \u00a0<\/p>","quoteUsername":"raaji","translations":{"Common":{"like":"Like","unlike":"Unlike"},"Forum":{"Quote":"Quote","Share":"Share"}}}">

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