Hello,
a customer buyed a new MSA2060 with 12x3,98TB SSD Drives and want to use a MSA-DP+ Pool for hosting his virtual machines.
He calculated two SSDs for stipe zones, but unfortunately forgot to consider the two additional SSDs for distributed spare capacity and so he ended up with 31,84TB useable space. (47,76TB - 4x3,98 = 31,81TB).
He needs to move 30TB on VM's to the new storage, would this be an massive performance impact?
I'am asking because from my experience the SSD performance slows down after reaching a certain amount of allocation (In this case 94% of 31,81TB), but i dont know how much impact this would have in an Full Flash Array with 12 SSDs with DP+.
Of course, another option would be to expand the pool with two additional 3,98TB SSDs. Therefore 39,8TB would be available and so only 75% utilisation. But would this make a difference from a performance perspective?
Perhaps someone had tested this scenario and got a answer,
Thanks in advance and best regards,
Fred