HP Serviceguard Continentalcluster manual 293

019C	0018	R1:5	RW	RW	RW	S..	0	0	RW	WD	Synchronized
019D	0019	R1:5	RW	RW	RW	S..	0	0	RW	WD	Synchronized

2.Create an RDF1 type device group. For example, the group name AsynDG.

On R1 side:

#symdg create AsynDG -type RDF1

On R2 side:

#symdg create AsynDG -type RDF2

3.All devices from the RDF (RA) group configuration are added to the device group for SRDF/Asynchronous operation. For example, if the RDF group displayed in the symrdf list display is group number 5, then all devices in this RDF group must be managed together within one device group for SRDF/Asynchronous operation.

#symld -g AsynDG addall -rdfg 5

4.Repeat the steps 1-3 on each host that need to run Serviceguard packages.

5.Query the device group to display the R1-to-R2 setup and the state of the SRDF/Asynchronous device pairs.

#symld -g AsynDG query -rdfa

Sample output from the command:

Source	(R1)	View			Target		(R2) View		MODES
--------------------------------						------------------------ -----					------------
		ST			LI		ST
Standard		A			N		A
Logical		T	R1 Inv	R2 Inv	K		T	R1 Inv	R2 Inv		RDF Pair
Device	Dev	E	Tracks	Tracks	S	Dev	E	Tracks	Tracks MDAC		STATE
--------------------------------					--	------------------------ -----					------------
DEV001	0196	RW	0	0	RW	0012	WD	0	0	S...	Synchronized
DEV002	0197	RW	0	0	RW	0013	WD	0	0	S...	Synchronized
DEV003	0198	RW	0	0	RW	0014	WD	0	0	S...	Synchronized
DEV004	0199	RW	0	0	RW	0015	WD	0	0	S...	Synchronized
DEV005	019A	RW	0	0	RW	0016	WD	0	0	S...	Synchronized
DEV006	019B	RW	0	0	RW	0017	WD	0	0	S...	Synchronized
DEV007	019C	RW	0	0	RW	0018	WD	0	0	S...	Synchronized
DEV008	019D	RW		0	0 RW 0019 WD				0	0 S	... Synchronized

6.Set the device group to Asynchronous mode:

#symrdf -g AsynDG set mode async

7.Consistency protection must be enabled to ensure the data consistency on R2 side for the SRDF/Asynchronous devices in the device group.

#symrdf -g AsynDG enable

8.If the SRDF pairs are not in a Consistent state at this point, initiate an establish command to synchronize the data on the R2 side from the R1 side. The device state will be SyncInProg until the Consistent status is reached.

#symrdf -g AsynDG establish

Sample output after the RDF pairs have been established:

Source	(R1)	View		Target (R2) View				MODES
----------------------				---------------------- -----
		ST			LI		ST
Standard		A			N		A
Logical		T	R1 Inv	R2 Inv	K	T R1 Inv R2 Inv RDF Pair
Device	Dev	E	Tracks	Tracks	S Dev E		Tracks Tracks MDAC STATE
------------- -- ------------------------ ----- ------------
DEV001	0196	RW	0	0	RW	0012	WD	0	0	A..X	Consistent
DEV002	0197	RW	0	0	RW	0013	WD	0	0	A..X	Consistent
DEV003	0198	RW	0	0	RW	0014	WD	0	0	A..X	Consistent
DEV004	0199	RW	0	0	RW	0015	WD	0	0	A..X	Consistent
DEV005	019A	RW	0	0	RW	0016	WD	0	0	A..X	Consistent
DEV006	019B	RW	0	0	RW	0017	WD	0	0	A..X	Consistent

Configuring Metrocluster with EMC SRDF using SRDF/Asynchronous 293