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63 Posts
0
2114
October 10th, 2012 00:00
Steps for cascade SRDF
Hi Folks ,
I am ware of the Cascade SRDF conceptually but i just want to note down how it will be implemeted step by step. I tried lot to search into powerlink PDF's which will help me to note down the commands but i am unlucky.
Can some one help with commands and validate my below steps.
Please feel free to add if i am missing anything.
Example :
Site A --> Site B --> Site C ( Assuming all site having dynamic SRDF bit enabled )
Step 1 : Setup SRDF between devices on Site A and Site B - Its very easy using "createpair command "
Step 2 : Make R2 device on Site B as R21 - Not sure how to do this , also not sure if we need to do this manually using commands.
Step 3: Setup SRDF between devices on Site B and Site C - Should be easy using "createpair command " only if the Site B device is in R21 state.
Thanks in Advance.
Regards
OnlySandy
sauravrohilla
859 Posts
0
October 10th, 2012 22:00
Hi Sandy,
I can help you in setting up the cascaded srdf.
E.g:
Step 1: create a text file with <025 035>
symrdf -sid siteA -rdfg 10 createpair -f -type r1
Step 2: create another text file <035 045>
symrdf -sid siteB -rdfg 20 createpair -f -type r1 -rdf_mode acp_disk
After running createpair at Site B, the device 035 will be converted to a R21 device.
Hope this helps..
regards,
Saurabh
OnlySandy
63 Posts
0
October 10th, 2012 23:00
Oh thants pretty straight forward. I thought we need to convert device to R21 but that not required.
Gr8 help thanks Saurabh.
Just a query is there any requirments to be satisfied before doing step2 . I am aware that second replication cant be in Sync mode . Any other limitations
sauravrohilla
859 Posts
1
October 10th, 2012 23:00
Hi,
As you already know the second leg cant be in sync mode and by default createpair command puts the pair in sync mode thats why I have added the -rdf_mode acp_disk option to put the second pairing in acp_mode while creating.
The first pair establish might ask you to provide -force option. need to check on that.
regards,
Saurabh