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3 Posts
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623
January 30th, 2018 02:00
RDF Create with file shows wrong order of Luns in rdf query command
When issuing a "RDF create -g xxx -f filename...." it starts the rdf relationshop. Doing a "RDF query" - Command afterwards the order of LUNs doesn' fit to the contents of that file.
Deleting the RDF connection and a "RDF query" the order is correct:
File order:
DEV001 00A23 001F6
DEV002 00A24 001F7
DEV003 00A25 001F8
DEV004 00A26 001F9
DEV005 00986 0062F
DEV006 0098A 00633
DEV007 00B1A 00637
DEV008 00B1E 0063B
DEV009 00B23 0063F
DEV010 00B27 00643
Order after a "RDF create...":
"symrdf -g CIN query"
Device Group (DG) Name : CIN
DG's Type : RDF1
DG's Symmetrix ID : 000292604887 (Microcode Version: 5876)
Remote Symmetrix ID : 000292604888 (Microcode Version: 5876)
RDF (RA) Group Number : 1 (00)
Source (R1) View Target (R2) View MODE
--------------------------------- ------------------------ ---- ------------
ST LI ST
Standard A N A
Logical Sym T R1 Inv R2 Inv K Sym T R1 Inv R2 Inv RDF Pair
Device Dev E Tracks Tracks S Dev E Tracks Tracks MACE STATE
--------------------------------- -- ------------------------ ---- ------------
DEV001 00986 RW 0 350374 RW 0062F WD 0 0 S... SyncInProg
DEV002 0098A RW 0 341484 RW 00633 WD 0 0 S... SyncInProg
DEV003 00A23 RW 0 6622 RW 001F6 WD 0 0 S... SyncInProg
DEV004 00A24 RW 0 32615 RW 001F7 WD 0 0 S... SyncInProg
DEV005 00A25 RW 0 17739 RW 001F8 WD 0 0 S... SyncInProg
DEV006 00A26 RW 0 34311 RW 001F9 WD 0 0 S... SyncInProg
DEV007 00B1A RW 0 333022 RW 00637 WD 0 0 S... SyncInProg
DEV008 00B1E RW 0 296063 RW 0063B WD 0 0 S... SyncInProg
DEV009 00B23 RW 0 366975 RW 0063F WD 0 0 S... SyncInProg
DEV010 00B27 RW 0 337492 RW 00643 WD 0 0 S... SyncInProg
Forcing the RDF connection and again RDF query :
"symdg delete CIN -force"
"symrdf -g CIN query"
Device Group (DG) Name : CIN
DG's Type : RDF1
DG's Symmetrix ID : 000292604887 (Microcode Version: 5876)
Remote Symmetrix ID : 000292604888 (Microcode Version: 5876)
RDF (RA) Group Number : 1 (00)
Source (R1) View Target (R2) View MODE
--------------------------------- ------------------------ ---- ------------
ST LI ST
Standard A N A
Logical Sym T R1 Inv R2 Inv K Sym T R1 Inv R2 Inv RDF Pair
Device Dev E Tracks Tracks S Dev E Tracks Tracks MACE STATE
--------------------------------- -- ------------------------ ---- ------------
DEV001 00A23 RW 0 0 RW 001F6 WD 0 0 S... Synchronized
DEV002 00A24 RW 0 0 RW 001F7 WD 0 0 S... Synchronized
DEV003 00A25 RW 0 0 RW 001F8 WD 0 0 S... Synchronized
DEV004 00A26 RW 0 0 RW 001F9 WD 0 0 S... Synchronized
DEV005 00986 RW 0 0 RW 0062F WD 0 0 S... Synchronized
DEV006 0098A RW 0 0 RW 00633 WD 0 0 S... Synchronized
DEV007 00B1A RW 0 0 RW 00637 WD 0 0 S... Synchronized
DEV008 00B1E RW 0 0 RW 0063B WD 0 0 S... Synchronized
DEV009 00B23 RW 0 0 RW 0063F WD 0 0 S... Synchronized
DEV010 00B27 RW 0 0 RW 00643 WD 0 0 S... Synchronized
Is there something wrong in our configuration ?
Because 4 different HP-UX will use these LUNs a different order of the LUN adresses will cause a mixture on the Conti Cluster, i.e:
Server 1 DEV001 shows adress 00986 / Server 2 DEV001 is 00A23 but these two server are part of a cluster.
Alfons
P7EXKX
3 Posts
1
January 30th, 2018 07:00
We did a test on a test - system and found the solution for this request:
To define the SRDF relationship we issued a "symrdf createpair - f without the "-g" for group.
This will create the RDF definition based on the file content without assigning it to a group
Afterwards we must create a group for the devices using "symdg create ..." and add the devices with "symdg add devices ....
This will start the RDF connection with the devices in the order listed in the file used for creating the group
PedalHarder
3 Apprentice
•
465 Posts
0
January 30th, 2018 16:00
The logical device name in the device group "DEVxxx" is not the LUN number that is presented to the host. It is just a label assigned to the device in the DG. In other words the scope of the logical device name is limited to Device group operations.
If your clusters are doing device group operations, you can consider using GNS device groups. With a GNS device group the DG instance lives on the array and all of the cluster nodes will see the same DG and therefore the Device logical name to Symmetrix device relationship will be the same.