SMI-S Block Server Performance Subprofile ========================================= This profile provides I/O statistics for various :ref:`CIM_StorageExtent` subclasses. OpenLMI-Storage implements the Block Server Performance Subprofile with these adjustments: * Applications cannot create custom manifests, i.e. :ref:`LMI_BlockStatisticsService.AddOrModifyManifest` is not implemented. * We provide :ref:`LMI_BlockStorageStatisticalData` for *every* :ref:`CIM_StorageExtent` subclass and not only for disk drives. :ref:`LMI_BlockStorageStatisticalData.ElementType` property is always set to ``9``, i.e. ``Extent``. * There is no sampling interval. OpenLMI always reports current values when returning :ref:`LMI_BlockStorageStatisticalData` instance. .. note:: Even though properties in :ref:`LMI_BlockStorageStatisticalData` are 64-bit, they are tracked as 32-bit on systems with 32-bit kernel. They can wrap pretty quickly on modern hardware. For example, on i686 with iSCSI drive on 10Gb/s link, the KBytesRead counter can wrap in approximately 27 minutes. With 64-bit kernels, these counters are tracked in 64-bits and they wrap once in a few years. Implementation -------------- All mandatory classes and methods are implemented. Classes ^^^^^^^ Implemented SMI-S classes: * :ref:`LMI_BlockStorageStatisticalData` * :ref:`LMI_StorageElementStatisticalData` * :ref:`LMI_StorageStatisticsCollection` * :ref:`LMI_MemberOfStorageStatisticsCollection` * :ref:`LMI_HostedStorageStatisticsCollection` * :ref:`LMI_BlockStatisticsService` * :ref:`LMI_BlockStatisticsCapabilities` * :ref:`LMI_BlockStatisticsManifest` * :ref:`LMI_BlockStatisticsManifestCollection` * :ref:`LMI_MemberOfBlockStatisticsManifestCollection` * :ref:`LMI_AssociatedBlockStatisticsManifestCollection` Methods ^^^^^^^ Implemented methods: * :ref:`LMI_BlockStatisticsService.GetStatisticsCollection`