iSCSI: multiple targets vs. single target

[LACOVID]

Hey there,

is there any best practice for iSCSI based storage in ESXi 6.7 regarding multiple vs single targets?

My Question is short and easy but didn't found anything useful... Should I prefere multiple targets with one target for each logical volume - which should be better i guess - or should I use one single iSCSI Target and attach all logical volumes to this target?

Best wishes!

[daphnissov]

Best Practices For Running VMware vSphere On iSCSI | VMware

[NathanosBlightc]

Please read this post by scott lowe, I think it gives you enough reason for that.

[NicolasAlauzet]

What is the storage that you are using? Best practices on targets may be different for different vendors.

Good thing also to remember is that there are additional configurations or best practices that can help to achieve best performance and configuration with your iscsi storage (mtu, multipath, and so on)

[LACOVID]

I use two hosts and one Supermicro Server as storage system with open-e v7 for management. There are only SSD on this storage system.

iSCSI target tuning on open-e side to match the vmware iSCSI settings is also done.

I know the "Best Practices Guideline" and setup wasn't a issue at all. I already set up Jumbo Frames, Multipathing with two vmkernels and two subnets, Round Robin with IOPS=1 and ofc 10GB ethernet between host and storage.

I'm just not sure what's the way to go since there are 3 Options in my Oppinion:

1) one LUN - one target: creare multiple datastorages inside vSphere on this LUN

2) multiple LUNs according to the needed datastorage no. and connect all of them with one iSCSI target

3) multiple LUNs according to the needed datastorage no. and one iSCSI target for each LUN