Hi there,
i have to configure a stretch metrocluster, but i do not find much litterature about it... I read many things about cDOT, and few things about metrocluster.
I'm used to configure 7-mode 20xx/22xx/25xx for NFS with ESX only.
My setup :
- 2 rooms, each with one FAS8020 (one controller, second is empty, e0e and e0f only network interface, 1 addon card with 4xSAS and 1 addon card with 2 optical ports for cluster interconnect) and one DS2246.
- SAS/optical are used to connect (see attached file, given by Netapp)
- a big optical cable (48 wires!) with patch panel to connect all of that directly (<100m)
- 2xHP 2530 switches (GbE) per rooms for management and data network
About what i read, here is what i understood (but i'm not sure !) :
-1- i should first plug and link all
-2- then use "netapp systemsetup" to configure each node
-3- mirror system and data partitions (i do not know how : system oncommand GUI ?)
-4- then use CLI to activate metrocluster
-5- for system i should not use root partitionning but use dedicated disks (because i'll have to mirror system and data partitions)
There is also some remaining questions :
-1- into systemsetup should i consider this as a "single node" or "two-node switchless" installation ?
-2- why is there an addon card with two optical ports i could have used e0a and e0b (with SFP) as usual for cluster interconnect, no ?
-3- about network what should i do ? I imagine something like that, can you correct me :
* node 1 : LIF1 on e0e to datastore 1, LIF2 on e0f to datastore 2 ; each LIF failing on the other
* node 2 : same thing
-> but there i do not know if LIF should only fail on the same node or also on the other (there are options to change the behaviour). I guess reply is "other" because if il loose one room...
-> also, datastore 1 & 2 are mirrored between nodes then how to handle that from ESX perspective ?
I guess i should not access same datastore from different node ?
I thing something like : to access datastore 1, i use LIF1 on node 1, and datastore 2 from LIF2 on node 2 ? Then depending if ESX are on room 1 or 2 they will go accross all the metrocluster, but this should perform well... is there a best way ?
-4- can i use only 2 disks for system ?
-5- can i use raid_dp with no spare (i read raid 4 with spare is not usable anymore) to avoid wasting space
Please give me your thought about that, i hope this won't be that i totaly misunderstood how a strech metrocluster works 
Also if you have links to read, no problem, i'll take it !
Many thanks in advance !