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Measures reported by SynNasSpacePerfTest
This test auto-discovers the disks on the target storage system and for each disk, reports the load, the I/O operations that are performed. In addition, this test also reveals the number of times read and write operations were performed on the disk. Using this test, administrators can figure out the disk that is busy processing I/O requests. This test also pinpoints to the disk that is over-utilized in terms of load.
Outputs of the test :One set of the results for each disk on the target Synology NAS storage system that is being monitored.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| IO_reads |
Indicates the rate at which data was read from this disk during the last measurement period. |
KB/sec |
Compare the value of this measure across disks to know which disk handled the maximum number of read
requests and which handled the least. If the gap between the two is very high, then it indicates serious irregularities in load-balancing across disks. |
| IO_writes |
Indicates the rate at which data was written to this disk during the last measurement period. |
KB/sec |
Compare the value of this measure across disks to know which disk handled the maximum number of write
requests and which handled the least. If the gap between the two is very high, then it indicates serious irregularities in load-balancing across disks. |
| IO_read_access |
Indicates the number of times read data was accessed from this disk per second during the last
measurement period. |
Accesses/sec |
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| IO_write_access |
Indicates the number of times write data was accessed from this disk per second during the last
measurement period. |
Accesses/sec |
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| Disk_load |
Indicates the utilization of this disk, in percentage |
Percent |
A value close to 100% for this measure is a cause for concern, as it indicates over-utilization of disk. This can seriously degrade the performance of the storage system. |
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