I am trying to decide between xenserver and esxi.
My configuration is :
1. R815/128GB/32 cores: Xen 6.0 / multipath / vdisk on RAID controller 0 : RAID 5 / 5 disk
2. R815/128GB/32 cores: ESXi4.1 / round robin-multipath 4 path Active I/O vdisk on RAID controller 1 : RAID 5 / 5 disk
3. MD3220i with 12 10K 600 GB. 4 subnets as per Dell's datasheet.
4. Dell 5224 swtiches fully used 8X3
5. iometer running 32K block / 64 io depth / 5 min run 67/33 read/write on win2k8r2/12gb/8cpu
NO Jumbo frames
When I first enabled RR on esxi, I was thrilled to see 4 active I/O paths. I thought this would beat Xen out of the water. I was so wrong!!
See attached Iometer running the same test on both VM's.
Xen: ~4000 iops / ~140Mbps
ESXi: ~1400 iops / ~40 Mbps
Has anyone tried out such an experiment? This seems like a huge difference. What am I missing?
Thanks
Nihar