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this field. This can provide an easy measure of both I/O completion time |
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and the backlog that may be accumulating. |
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Logical Volume collector |
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************************ |
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This data collector will gather information about the attributes of logical |
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volumes present in the system. |
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Its ``kind`` in the report will be ``0`` (`Performance reporting collectors`_). |
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Its ``category`` field in the report will contain the value ``storage``. |
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The ``data`` section of the report of this collector will be a list of items, |
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each representing one logical volume and providing the following fields: |
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``uuid`` |
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The UUID of the logical volume. |
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``name`` |
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The name of the logical volume. |
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``attr`` |
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The attributes of the logical volume. |
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``major`` |
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Persistent major number or -1 if not persistent. |
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``minor`` |
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Persistent minor number or -1 if not persistent. |
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``kernel_major`` |
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Currently assigned major number or -1 if LV is not active. |
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``kernel_minor`` |
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Currently assigned minor number or -1 if LV is not active. |
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``size`` |
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Size of LV in bytes. |
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``seg_count`` |
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Number of segments in LV. |
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``tags`` |
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Tags, if any. |
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``modules`` |
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Kernel device-mapper modules required for this LV, if any. |
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``vg_uuid`` |
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Unique identifier of the volume group. |
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``vg_name`` |
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Name of the volume group. |
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``segtype`` |
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Type of LV segment. |
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``seg_start`` |
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Offset within the LVto the start of the segment in bytes. |
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``seg_start_pe`` |
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Offset within the LV to the start of the segment in physical extents. |
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``seg_size`` |
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Size of the segment in bytes. |
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``seg_tags`` |
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Tags for the segment, if any. |
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``seg_pe_ranges`` |
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Ranges of Physical Extents of underlying devices in lvs command line format. |
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``devices`` |
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Underlying devices used with starting extent numbers. |
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``instance`` |
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The name of the instance this LV is used by. |
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DRBD status |
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*********** |
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