v8 additional nodes

[barrysmoke]

Can someone from starwind elaborate on the expansion scheme for v8?
obviously, you wouldn't want to replicate your storage past 3 nodes, you would want each additional node you add to increase your storage capacity, as well as performance.
will there be like a raid5 for nodes?

[anton (staff)]

It works exactly like VMware VSAN does - you select up to two partners with your current LUN and it (LUN) gets replicated between them.
So at the end of the day you can have as many nodes as you want but you'd add with a maximum 3-way replica between LUNs (we'll add majority
dataless voting node and 4-way replica with post-V8 release).

Forget about RAID5. Doing synchronization to fetch and update the whole parity stripe over network is so slow it's basically unusable...

Can someone from starwind elaborate on the expansion scheme for v8?
obviously, you wouldn't want to replicate your storage past 3 nodes, you would want each additional node you add to increase your storage capacity, as well as performance.
will there be like a raid5 for nodes?

[barrysmoke]

when I say raid5, I just meant something like raid5 at the network level. like hp/lefthand, basically raid5 for sans.
21tb san - node1
21tb san - node2
21tb san - node3

I'd like to have a 42 tb usable, and be able to lose a node.
add a 4th, and have 63tb usable...etc.

I didn't mean parity at the network level, I know from your other threads on raid5, you don't like it for performance, but it really is the best use of disk space, and redundancy.

[Max (staff)]

The write penalty you get with RAID-5 becomes cadaverous when you do random writes.
Yes, it's good for space, but it's prone to slow down to the point of becoming useless if a drive failure occurs.

[barrysmoke]

again, trying to reflect the need for something similar on the network/san level, but not actual raid5

[anton (staff)]

Can you tell why used data distribution model doesn't work for you?

again, trying to reflect the need for something similar on the network/san level, but not actual raid5