eG Monitoring
 

Measures reported by RbtSteelStoreStTest

SteelHeads transparently intercept and analyze all of your WAN traffic. TCP traffic is segmented, indexed, and stored as segments of data, and the references representing that data are stored on the RiOS data store within SteelHeads on both sides of your WAN. After the data has been indexed, it is compared to data already on the disk. Segments of data that have been seen before aren't transferred across the WAN again; instead a reference is sent in its place that can index arbitrarily large amounts of data, thereby massively reducing the amount of data that needs to be transmitted. One small reference can refer to megabytes of existing data that has been transferred over the WAN before. This is what Data store does in Riverbed Steelhead device!

This test auto-discovers the datastore and reports the details about the hits and misses that happened in Riverbed Steelhead device. It also alerts the administrators about the datastores that are running without space.

Outputs of the test : One set of results for the Riverbed Steelhead device is being monitored.

The measures made by this test are as follows:

Measurement Description Measurement Unit Interpretation
Total_Hits Indicates the total number of hits measured on the data store per second during last measurement period. Hits/sec A high value is desired for this measure. A very low value is a cause for concern, as it indicates that cache usage is very poor; this in turn implies that direct disk accesses, which are expensive operations, are high.
Total_Miss Indicates the total number of misses measured on the data store per second during last measurement period. Misses/sec A high value of this measure can cause perforamnce degradation of the system and increases latency, because instead of just going to disc to read the data, you first have to read the cache and see it's not there, and then read the disc to finally get the data.
Disk_Usage Indicates the percentage of disk utilized for the data store operations. Percent A value of 100% is a cause of concern, as it indicates that the disk is running out of space.