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Measures reported by XIOVolFoldTest
In an EMC XtremIO cluster, you can define various quantities of disk space as volumes. In large environments, multiple EMC XtremIO clusters may be deployed with too many volumes. If too many volumes are available in the cluster, then, monitoring the I/O processing and the I/O load on each individual volume is difficult for the administrators. Therefore, it is necessary to group the volumes and place those volumes in a volume folder. By analyzing the I/O processing and I/O load of each volume folder, administrators can figure out the processing ability of the volumes within the volume folder. If a volume folder is experiencing minimum activity, then administrators can resize a volume and allocate the available disk space to a volume that is currently experiencing space crunch or a volume that is constantly handling high I/O rate, thereby evenly distributing the load across the volume folders. To achieve the above, administrators can use the XIOVolFoldTest test.
This test auto discovers the volume folders of the target storage array and helps administrators to figure out the volume folder that is busy processing I/O requests, detect irregularities in the distribution of I/O load across the volume folders and thus enables administrators to identify the volume folder whose I/O processing rate is the maximum and the minimum. Using this test, administrators can easily load balance the volumes and utilize the volumes more efficiently.
Outputs of the test : One set of results for each volume folder of the target EMC XtremIO being monitored
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| bandwidth |
Indicates the amount of data utilized for I/O operations per second on this volume folder. |
MB/Sec |
|
| readBandwidth |
Indicates the amount of data utilized for read I/O operations per second on this volume folder. |
MB/Sec |
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| writeBandwidth |
Indicates the amount of data utilized for write I/O operations per second on this volume folder. |
MB/Sec |
|
| iops |
Indicates the rate at which I/O operations were performed on this volume folder during the last measurement period. |
IOPS |
Compare the value of this measure across the volumes to know which volume handles the maximum number of I/O operations . |
| readIOPS |
Indicates the rate at which read operations were performed on this volume folder. |
IOPS |
|
| writeIOPS |
Indicates the rate at which write operations were performed on this volume folder. |
IOPS |
|
| reads |
Indicates the number of reads performed on this volume folder per second during the last measurement period. |
Reads/sec |
Compare the values of this measure across the volumes to know which volume folder handles the maximum number of read requests. |
| writes |
Indicates the number of writes performed on this volume folder per second during the last measurement period. |
Writes/Sec |
|
| dataReads |
Indicates the rate at which data was read from this volume folder during the last measurement period. |
MB/Sec |
|
| dataWritten |
Indicates the rate at which data was written to this volume folder during the last measurement period. |
MB/Sec |
|
| avgReadSize |
Indicates the amount of data read from this volume folder per I/O operation during the last measurement period. |
MB/Op |
Compare the values of these measures across the volume folders to identify the volume folder that is the slowest in terms of servicing read and write requests (respectively). |
| avgWriteSize |
Indicates the amount of data written to this volume folder per I/O operation during the last measurement period. |
MB/Op |
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