eG Monitoring
 

Measures reported by XIOIGFoldersTest

An initiator group folder comprises of multiple initiator groups. This test auto-discovers the initiator group folders of the target storage array and helps administrators to figure out the initiator group folder that is busy processing I/O requests, detect irregularities in the distribution of I/O load across the initiator group folders and thus enables administrators to initiate pre-emptive measures.

Outputs of the test : One set of results for each initiator group folder of the EMC XtremeIO being monitored

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
noOfSubFolders Indicates the number for sub-folders that were created from this initiator group folder. Number  
bandwidth Indicates the amount of data utilized for performing I/O operations per second on this initiator group folder. MB/Sec  
readBandwidth Indicates the amount of data utilized for performing read I/O operations per second on this initiator group folder. MB/Sec High values for these measures indicate high bandwidth usage by this initiator group folder. By comparing the values of these measures across the initiator group folders, you can isolate those initiator group folders that consume bandwidth excessively, and also understand which operation consumed too much of bandwidth - is it reading? or writing?
writeBandwidth Indicates the amount of data utilized for performing write I/O operations per second on this initiator group folder. MB/Sec
iops Indicates the rate at which I/O operations were performed on this initiator group folder. IOPS Compare the value of this measure across the initiator group folders to know which initiator group folder id handling the maximum number of I/O operations.
readIOPS Indicates the rate at which read operations were performed on this initiator group folder. IOPS  
writeIOPS Indicates the rate at which write operations were performed on this initiator group folder. IOPS A high value is desired for this measure. A low value for this measure may indicate a poor throughput thus resulting in a decrease in the free space of the initiator group folder and the overall performance.
reads Indicates the number of read operations performed on this initiator group folder per second during the last measurement period. Reads/sec Compare the value of this measure across initiator group folders to know which initiator group folder is handling the maximum number of read requests.
writes Indicates the number of write operations performed on this initiator group folder per second during the last measurement period. Writes/Sec Ideally, the value of this measure should be high. A steady dip in this measure value could indicate a potential writing bottleneck. By comparing the value of this measure across the initiator group folders, you can quickly identify the initiator group folder which is the slowest in processing write requests.
dataReads Indicates the rate at which data was read from this initiator group folder during the last measurement period./td> MB/Sec Compare the values of these measures across the initiator group folders to identify the slowest initiator group folder in terms of servicing read and write requests (respectively).
dataWritten Indicates the rate at which data was written to this initiator group folder during the last measurement period. MB/Sec
avgReadSize Indicates the amount of data read from this initiator group folder per I/O operation during the last measurement period. MB/Op Compare the values of these measures across the initiator group folders to identify the slowest initiator group folder in terms of servicing read and write requests (respectively).
avgWriteSize Indicates the amount of data written to this initiator group folder per I/O operation during the last measurement period. MB/Op