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Measures reported by CifsStatsTest
The Unified Storage Device (USD) exports data as files through two primary protocols, NFS and CIFS, which correspond to the UNIX and Windows processes.
Key features that CIFS offers are:
- File Access with integraty: CIFS supports the usual set of file operations; open, close, read, write and seek. CIFS also supports file and record lock and unlocking. CIFS allows multiple clients to access and update the same file while preventing conflicts by providing file sharing and file locking.
- Optimization for Slow Links: The CIFS protocol has been tuned to run well over slow-speed dial-up lines. The effect is improved performance for users who access the Internet using a modem.
- Security: CIFS servers support both anonymous transfers and secure, authenticated access to named files. File and directory security policies are easy to administer.
- Performance and Scalability: CIFS servers are highly integrated with the operating system, and are tuned for maximum system performance. CIFS supports all Microsoft platmforms after Windows 95. It also supports other popular operation systems such as Unix, VMS, Macintosh, IBM LAN server etc.
- Unicode File Names: File names can be in any character set, not just character sets designed for English or Western European languages.
Global File Names: Users do not have to mount remote file systems, but can refer to them directly with globally significant names, instead of ones that have only local significance.
By continuously tracking the status of the CIFS service and monitoring the read/write operations performed through the CIFS protocol, the CIFS test promptly detects and reports the non-availability of the service and provides you with a heads-up on probable latencies in the processing of I/O requests.
The measures made by this test are as follows:
| Measurement |
Description |
Measurement Unit |
Interpretation |
| Service_status |
Indicates the current status of the CIFS service. |
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The values reported by this measure and their numeric equivalents are available in the table below:
| Measure Value |
Numeric Value |
| Starting |
1 |
| Started |
2 |
| Stopping |
3 |
| Stopped |
4 |
Note:
This measure reports the Measure Values listed in the table above while indicating the status of the CIFS service. However, in the graph of this measure, the state is indicated using only the Numeric Values listed in the above table. |
| Cifs_ops |
Indicates the rate at which operations were performed by users through CIFS protocol to access this NetApp Unified Storage system. |
Ops/sec |
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| Cifs_latency |
Indicates the average time taken for performing the operations through the CIFS protocol. |
Milliseconds |
A low value is desired for this measure. |
| Cifs_read_ops |
Indicates the rate at which the read operations were performed across all LUNs of this storage system through the CIFS protocol. |
Ops/sec |
Very high values for these measures are indicative of the existence of road-blocks to rapid reading/writing by the storage device.
By observing the variations in these measures over time, you can understand whether the latencies are sporadic or consistent. Consistent delays in reading/writing could indicate that there are persistent bottlenecks (if any) in the storage device to speedy I/O processing. |
| cifs_write_ops |
Indicates the rate at which the write operations were performed on the LUNs of this storage system through the CIFS protocol. |
Ops/sec |
| Read_latency |
Indicates the average time taken to perform read operations across all LUNs through the CIFS protocol. |
Milliseconds |
| Write_latency |
Indicates the average time taken to perform write operations across all LUNs through the protocol. |
Milliseconds |
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