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Advanced O&M Command Reference

OceanStor 18000 V3 Series V300R006

This document is applicable to OceanStor 18500 V3 and 18800 V3. 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. The document that you browse online matches the latest C version of the product. Click Download to download documents of other C versions.
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show space global_config

show space global_config


The show space global_config command is used to query global configurations of space.


show space global_config { field=? | show_type=? }






Configuration type.

The value can be "global_cfg_bonus_cache_num", "global_cfg_switch_lun_num", or "global_cfg_display_controller_enable", where:

  • "global_cfg_bonus_cache_num": bonus cache.
  • "global_cfg_switch_lun_num": number of concurrent LUN controller modifications.
  • "global_cfg_display_controller_enable": switch of displaying information about a LUN's working controller and owning controller.


Display type.

The value is "all", which is used to query all of the global variables.


Developer view

Usage Guidelines



  • Query global variables.
    developer:/>show space global_config 
      Name                         Value 
      ---------------------------  ----- 
    Space Global Bonus Cache Num  20000 
    Space Global Switch LUN Num 20
  • Query all of the global variables.
    developer:/>show space global_config show_type=all 
    Bonus Cache Num         : 20000     
    Switch LUN Num          : 100       
    Thin Alloc Min Capacity(Sector) : 41943040  
    Thin Alloc Max Capacity(Sector) : 104857600 
    Display Controller Enable : Off 
    Defrag Action      : Start 
    Defrag All LUN : Yes 
    Defrag Start Time : 20:00 
    Defrag Duration : 00:30 
    Defrag Threshold(Sector) : 419430400 
    Defrag Grain Num : 16 
    Access Snapshot Enable: Yes 
    Alternate Data Streams Enable: No 
    Pool Overcommit Alarm Enable: No 
    Unmap Overload Control High Water Level: 70 
    Unmap Overload Control Low Water Level: 30 
    Maximum Unmap Delay Time(ms): 500 
    Unmap Overload Control Switch: Off 
    Data Preread Enable: No 
    Maximum Preread Number: 250 
    Dir Size Mode Enable: No 
    Fill Zero Switch: Off 
    Check Slow LUN Switch: On 
    Check Slow File System Switch: On 
    Async Delete Optimization Enable: No 
    WORM Scan File System Number            : 16       
    WORM Scan File Number                   : 100     
    Space Exhaustion Protection Enable      : No 
    I/O Timeout Failover Enable             : No 
    Max Async Delete Task Number            : 16

System Response

The following table describes the parameter meanings.




Name of a configuration item.


Configured value.

Thin Alloc Min Capacity(Sector)

Minimum value for the thin LUN space allocation policy (sector).

Thin Alloc Max Capacity(Sector)

Maximum value for the thin LUN space allocation policy (sector).

Display Controller Enable

Switch of displaying a LUN's working controller and owning controller.

Defrag Action

Thin LUN space defrag action.

Defrag All LUN

Whether to defrag all thin LUNs.

Defrag Start Time

Start time of thin LUN space defrag.

Defrag Duration

Duration of thin LUN space defrag.

Defrag Threshold(Sector)

Threshold of thin LUN space defrag (sector).

Defrag Grain Num

Number of defragged grains in each thin LUN space defragment.

Access Snapshot Enable

Whether the function that any directory can access snapshots is supported.

Alternate Data Streams Enable

Whether the alternate data streams function is supported.

Pool Overcommit Alarm Enable

Whether an alarm is generated when the total subscribed capacity of file systems in a storage pool exceeds the storage pool capacity.

Unmap Overload Control High Water Level

High water level of LUN possession.

Unmap Overload Control Low Water Level

Low water level of LUN possession.

Maximum Unmap Delay Time

Maximum delay of the unmap command.

Unmap Overload Control Switch

Switch for the unmap command overload control.

Dir Size Mode Enable

Control switch of the directory attribute.

Data Preread Enable

Whether the file system preread function is supported.

Maximum Preread Number

Maximum number of concurrent preread tasks in all file systems.

Fill Zero Switch

Switch for filling the page with zero when CRC or BST errors occur in reading I/Os.

Check Slow LUN Switch

Switch of detecting LUNs that have long processing latency.

Check Slow File System Switch

Switch of detecting file systems that have long processing latency.

Async Delete Optimization Enable

Switch of optimizing the asynchronous deletion function.

Switch LUN Num

Number of concurrent LUN controller modifications.

Bonus Cache Num

Bonus cache.

WORM Scan File System Number

Number of WORM file systems concurrently scanned in the background.

WORM Scan File Number

Number of files scanned by a single WORM file system.

Space Exhaustion Protection Enable

Switch of space exhaustion protection for file systems.

I/O Timeout Failover Enable

Failover switch for the I/O timeout.

Max Async Delete Task Num

Maximum number of asynchronous deletion tasks.

Updated: 2019-03-30

Document ID: EDOC1000138389

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