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Advanced O&M Command Reference

OceanStor 5000, 5000F, 6000, and 6000F V5 Series V500R007

This document is applicable to OceanStor 5110 V5, 5110F V5, 5300 V5, 5500 V5, 5600 V5, 5800 V5, 6800 V5, 5300F V5, 5500F V5, 5600F V5, 5800F V5, and 6800F V5. Based on the CLI, this document describes how to use various commands classified by functionsand how to set the CLI and manage the storage system through these commands.
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change cache dsgbase_concur

change cache dsgbase_concur


The change cache dsgbase_concur command is used to set a base concurrency for cache global object destaging.


change cache dsgbase_concur cache_layer=? concur_type=? reqnum=? pagenum=?





cache_layer =?

Cache layer.

The value can be "volume_cache" or "stripe_cache", where:

  • "volume_cache": layer-1 cache or volume cache.
  • "stripe_cache": layer-2 cache or stripe cache.


Concurrency type.

  • When "cache_layer" is set to "volume_cache", the value of "concur_type" can be "thick_lun", "thin_lun", or "all".
  • When "cache_layer" is set to "stripe_cache", the value of "concur_type" can be "SSD", "HDD", or "all".


Number of concurrent REQs.

The value ranges from 1 to 8192.

The value indicates the number of concurrent cache flushing REQs.


Number of concurrent pages.

The value ranges from 1 to 262,1440.

The value indicates the number of concurrent cache flushing pages.


Developer view

Usage Guidelines

Set the base number of concurrent REQs and pages for layer-1 or layer-2 cache global objects.


Set the base REQ and page concurrencies of stripe cache global HDD destaging to "512" and "25536", respectively.

developer:/>change cache dsgbase_concur cache_layer=stripe_cache concur_type=all reqnum=512 pagenum=25536 
WARNING: You are about to modify the REQ and page concurrencies, which are basic destage concurrency of cache global objects. This operation may affect system performance. 
Suggestion: Before performing this operation, confirm that the REQ and page concurrencies need to be modified. 
Have you read warning message carefully?(y/n)y 

Are you sure you really want to perform the operation?(y/n)y 
Command executed successfully.

System Response


Updated: 2019-07-11

Document ID: EDOC1000181619

Views: 637179

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