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Qos show front_concur
Function
The Qos show front_concur command is used to view information about front-end concurrency control of the current storage system.
Example
View existing cache partitions and concurrency usage of each priority in the current storage system.
admin:/diagnose>Qos show front_concur
Maximum system concur : 1024
Refused system concur : 0
Max single LUN concur : 2048
Frontconcur io in : 0
Frontconcur io back : 0
Current left IO in queues : 0
Priority weight : 0 40 0 32 25 0 0 0
Cache partition(0) information:
Current max total concur : 1024
Current total concur (include waiting io): 0
Current left IO number in this queue : 0
Current total concur (actual num) : 46
priority maxConcur concurUsed NotSatisfyCnt AllIo LeftIo maxUsedConcur maxWaitIONum adjustNumber defaultMaxConcur
--------- --------- --------- --------- --------- --------- --------- --------- --------- ---------
0 1 0 0 0 0 0 0 723 1
1 12 0 0 0 0 0 0 723 422
2 1 0 0 0 0 0 0 723 1
3 13 0 0 0 0 0 0 723 337
4 16 0 0 0 0 0 0 723 263
5 1 0 0 0 0 0 0 723 1
6 1 0 0 0 0 0 0 723 1
7 1 0 0 0 0 0 0 723 1
System Response
The following table describes the parameter meanings.
Parameter |
Meaning |
|---|---|
| maximum system concur | Maximum system concurrencies. |
| Refused system concur | Number of concurrencies that exceed the maximum system concurrencies and are refused. |
| max single LUN concur | Maximum concurrencies of a single LUN. |
| Frontconcur io in | Number of I/Os received by front-end concurrencies. |
| Frontconcur io back | Number of returned I/Os received by frontend concurrencies. |
| priority weight | Weight of front-end concurrency priority. |
| Current max total concur | Maximum concurrencies of cache partition N. |
| current total concur (include waiting io) | Current concurrencies of cache partition N. |
| Current left IO number in all priority queues | Number of I/Os in all priority queues. |
| Current left IO number in this queue | Number of I/Os in this priority queue. |
| Current total concur (actual num) | Total number of current concurrencies. |
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