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NVMe是否支持对集群模式VMDK使用Wear (写入独占所有注册者)功能

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适用场景

  • SAN
  • NVMe

问题解答

  • 不支持、 适用于集群模式VMDK的NVMe不支持耗损。
  • 它仍处于规划阶段。
  • 但是、FC和iSCSI支持此功能。
  •  对于NVMe、clustered VMDK supported 选项设置为否;对于FC、此选项设置为是。

clustered-VMDK.png

  • 与此类似、下面的ESXi命令行界面分别适用于NVMe和FC。

vsish -e get /storage/scsifw/devices/uuid.bb9xcxcxcxcxcxcxcxcxcxa38/info
is WEAR reservation supported?:0

vsish -e get /storage/scsifw/devices/naa.600xcxcxcxcxcxcxcxcxcx496f/info
is WEAR reservation supported?:1

追加信息

  • 集群模式VMDK—VMware在vSphere 7中引入了此功能。它是VMFS6数据存储库的属性、可在新数据存储库上启用。
  • 如果VMFS启用了集群模式VMDK (顺便提一下、Vvol数据存储库不具有此功能)、则表示一个VMDK可以与多个VM共享。
  • SCSI3-PR用于I/O隔离、这基本上意味着它控制多个节点对同一设备的访问。
  • SCSI3-PR具有多种不同的类型、包括磨损:
    • 专属写作(we)
    • 专属访问(EA)
    • 仅写入独占注册人(WERO)
    • 仅限独占访问注册人(EARO)
    • 以独占方式写入所有注册人(耗损)
    • 独占访问所有注册人(EaAR)
  • 什么是SCSI预留和SCSI永久性预留?
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