eG Monitoring
 

Measures reported by LHVolSnapShotTest

This test auto-discovers the snapshots on each volume of the target storage cluster and helps administrators to figure out the snapshot that is busy processing I/O requests, detect irregularities in the distribution of I/O load across the snapshots. In addition, using this test, administrators can analyze the space utilization of each snapshot and thus figure out the snapshots that are running out of space.

Outputs of the test : One set of results for each volume:snapshot combination on the target storage cluster being monitored.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Total_space Indicates the total size of this snapshot. GB  
Provisioned_space Indicates the space provisioned for this snapshot while created. GB  
Used_space Indicates the space that was already utilized on this snapshot. GB  
Free_space Indicates the space that is available for use in this snapshot. GB  
Total_space_util Indicates the percentage of space that is utilized in this snapshot. Percent A high value for this measure indicates that the snapshot is currently running out of space. Administrators can either clear unwanted data on the snapshot or add additional resources.
Allocated_space_used Indicates the percentage of space already utilized from this snapshot against the allocated space for this snapshot. Percent  
Tot_free_space_pct Indicates the percentage of space that is available for use in this volume. Percent  
Allocated_free_pct Indicates the percentage of space that is available for use from this cluster against the allocated space. Percent  
Cluster_space_used Indicates the percentage of space utilized by this snapshot on the storage cluster. Percent  
IO_reads Indicates the rate at which read I/O operations were performed on this snapshot during the last measurement period. Operations/sec  
IO_writes Indicates the rate at which write I/O operations were performed on this snapshot during the last measurement period. Operations/sec  
Data_reads Indicates the rate at which data was read from this snapshot during the last measurement period. MB/sec  
Data_writes Indicates the rate at which data was written to this snapshot during the last measurement period. MB/sec  
Pending_read_ops Indicates the rate at which read operations were pending on this snapshot during the last measurement period. Operations/sec  
Pending_write_ops Indicates the rate at which write operations were pending on this snapshot during the last measurement period. Operations/sec  
Read_latency Indicates the time taken to complete read operations on this snapshot. Millisec  
Write_latency Indicates the time taken to complete write operations on this snapshot. Millisec  
Cache_hits Indicates the rate at which cache of this snapshot was read during the last measurement period. Operations/sec