Dell PowerFlex v3.6.x CLI Reference Guide

Syntax

scli --set_vtree_migration_policy (((--protection_domain_id <ID> | --protection_domain_name <NAME>) --storage_pool_name <NAME>) |--storage_pool_id <ID>) --policy {optimize_migration | limit_concurrent_io | favor_application_io | dynamic_bandwidth_throttling} (Options) 
  [--i_am_sure] 

Note about V-Tree migration throttling

During V-Tree migration, the source V-Tree is copied to two destination copies. This means that for each device in the source Storage Pool there are X MB/sec of reads, while in the destination Storage Pool there are 2X MB/sec of writes. If you set the bandwidth_limit to X MB/sec, it will remain that at the source, while it will increase to 2X MB/sec at the destination.

Parameters

--protection_domain_id <ID>

Protection Domain ID

--protection_domain_name <NAME>

Protection Domain name

--storage_pool_name <NAME>

Storage Pool name

--storage_pool_id <ID>

Storage Pool ID

--policy <POLICY>

Policy to use for I/O priority of V-Tree migration. Can be one of the following:

limit_concurrent_io

Limit the number of allowed concurrent V-Tree migration I/Os to the value defined for concurrent_io_limit.

favor_application_io

(Default) Limit the number of allowed concurrent V-Tree migration I/Os to the values defined for concurrent_io_limit and bandwidth_limit, regardless of user I/Os.

Options

Choose one or several:

--concurrent_io_limit <LIMIT>

The maximum number of concurrent V-Tree migration I/Os per device. Valid range: 1-20.

--bandwidth_limit <BANDWIDTH>

The maximum bandwidth of V-Tree migration I/Os, in KB/s, per device. The valid range is 1024-25600 (25 MB). This property will take effect only if the policy is set to favor_application_io.

--i_am_sure

Skip the safety questions for command execution. (For example: “This could damage the stored data. Are you sure?”)