Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

There are several methods to activate SRDF/A DSE:

• Set the SRDF/A group parameter rdfa_dse_autostart to ENABLE.

  SRDF/A DSE becomes active when the SRDF/A session is activated.

• Modify the SRDF/A DSE status for a device group, composite group, or file when the SRDF link status is Read Write,

  This activates or deactivates SRDF/A DSE for groups on both the R1 and R2 sides.

  NOTE:

  The SRDF links must be in asynchronous mode and SRDF/A must be active for activate or deactivate actions to succeed.

  Use the following commands to modify the device group, composite group, or file:

  symrdf [-g DgName | -cg CgName | -f FileName]

  activate | deactivate -rdfa_dse

• Modify the SRDF/A DSE status using RA group operations when the SRDF link status is Read Write.

  Use the following commands to modify the group:

  symrdf -sid SID -rdfg GrpNum 
        [-v][-noprompt] 
        [-i Interval] 
        [-c Count]
  
  activate   -rdfa_dse  [-both_sides]
  deactivate  -rdfa_dse [-both_sides]
  

  The -both_sides option activates/deactivates SRDF/A DSE for groups on both the source and target sides. Otherwise, the activate/deactivate is only performed on the source side.

• Set the group mode to sync or acp when SRDF/A DSE is active for an SRDF group.

  This method does not require deactivating SRDF/A DSE.

  Deactivating SRDF/A in a group automatically deactivates SRDF/A DSE for that group.

Restrictions

Restrictions on activating SRDF/A DSE with dynamic cache partitioning include:

• All devices in the SRDF/A session must be in the same DCP.
• The rdfa_dse_threshold must be set, and must be lower than the rdfa_cache_percentage setting.
• The SRDF group must have at least one associated DSE pool with SAVE devices enabled.

Use the following syntax to activate SRDF/A DSE when dynamic cache partitioning is enabled:

symrdf type activate -rdfa_dse

Valid values for type are -dg, -cg, -file, or -rdfg.