Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

SRDF/A configuration parameters include array-wide parameters, and group level settings.

Dell Solutions Enabler Array Controls and Management CLI User Guide shows how to set the following SRDF/A array-wide parameters:

• SRDF/A cache usage - The percentage of write pending slots available to SRDF/A. Raising the value increases how much cache SRDF/A can use. Lowering the value reserves additional cache for non-SRDF/A cache usage.
• Maximum host throttle time - When the write pending limit is reached, delays writes from the host until a cache slot becomes free.

Syntax

To set the SRDF/A group-level attributes on an SRDF group:

symrdf -sid SymmID -rdfg GrpNum [-v] [-symforce]
     [-noprompt] [-i Interval] [-c Count]

.............

set rdfa
	[-cycle_time 1 - 60]                                      
	[-priority 1 - 64]                           
	[-transmit_idle {on|off}]
	[-both_sides]

Options

-cycle_time (-cyc)

Sets the minimum time to wait before attempting an SRDF/A cycle switch. This option is not allowed for VASA RDF groups.

Valid values are 1 through 60 seconds.

The default value for Enginuity 5876 and later is 15 seconds.

-priority (-pri)

Sets which SRDF/A sessions are dropped if the cache becomes full.

Valid values are 1 (highest priority, last to be dropped) through 64 (lowest priority).

The default value is 33.

-transmit_idle (-tra)

Allows the SRDF/A session to wait (not drop) when the link cannot transmit data. This option is not allowed for VASA RDF groups.

Valid state values are on and off.

The default value is on.

-both_sides

Applies the SRDF/A attributes to both the source and target sides of an SRDF/A session.

If -both_sides is not specified, attributes are applied only to the source side.

Examples

To set the minimum cycle time for both sides of SRDF/A group 160:

symrdf -sid 134 -rdfg 160 set rdfa -cycle_time 32 -both_sides

To set the session priority for both sides of SRDF/A group 160:

symrdf -sid 134 -rdfg 160 set rdfa -priority 55 -both_sides

To set the cycle time and session priority for only the source side of SRDF/A group 12:

symrdf -sid 134 -rdfg 12 set rdfa -cycle_time 32 -priority 20

An RDF Set 'Attributes' operation execution is in progress for RDF group 12. 
Please wait...
    SRDF/A Set Min Cycle Time(1134,012)..........................Started.
    SRDF/A Set Min Cycle Time (1134,012).........................Done.
    SRDF/A Set Priority (1134,012)...............................Started.
    SRDF/A Set Priority (1134,012)..........................,,,,,Done.
The RDF Set 'Attributes' operation successfully executed for RDF group 12.