Dell EMC Solutions Enabler 9.2 SRDF Family CLI User Guide

Syntax

Use the symrdf set rdfa_pace command to set the SRDF/A write pacing attributes for an SRDF group.

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

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

	set rdfa_pace
		  [-dp_autostart {on | off}] 
		  [-wp_autostart {on | off}]
		  [-delay 1 - 1000000] 
		  [-threshold 1 - 99]>
		  [-both_sides]

Options

-dp_autostart (-dp_aut)

Whether SRDF/A device-level pacing is automatically enabled or disabled when an SRDF/A session is activated or deactivated for an SRDF group.

Valid state values are on or off.

Default is off.

-wp_autostart (-wp_aut)

Whether the SRDF/A group-level pacing feature is automatically enabled or disabled when an SRDF/A session is activated for an SRDF group.

Valid state values are on or off.

Default is off.

-delay (-del)

Sets the maximum host I/O delay, in microseconds, that the SRDF/A write pacing can cause.

Valid values are 1 through 1000000 microseconds.

Default is 50000 microseconds.

-threshold (-thr)

Sets the minimum percentage of the array write-pending cache at which the array begins pacing host write I/Os for an SRDF group.

Valid values are between 1 and 99.

Default is 60.

-both_sides

Sets the SRDF/A write pacing attributes on both the source and target sides of an SRDF/A session. Otherwise, these attributes are only set on the source side.

NOTE:

If you plan on swapping the personalities of the R1 and R2 devices, configure the same SRDF/A write pacing values on both sides.

Examples

symrdf -sid 134 -rdfg 12 set rdfa_pace -delay 1000 -threshold 55 -wp_autostart on

To display two entries for each attribute being applied; one for the source side and one for the target side, use the -both_sides, option:

symrdf -sid 432 -rdfg 75 set rdfa_pace -delay 500 -threshold 10 -wp_autostart on -dp_autostart on -both_sides