Been thinking about oversubscription and port usage. I suspect most SANs are seriously underutilising their available bandwidth. Oversubscription is therefore a good thing – but it will be dependent on being able to use that oversubscription. Cisco switches (gen2) allow oversubscription at the port group level. On a 48-port card this is per group of 12 ports but there are restrictions – try putting more than two 4Gb/s ports at dedicated in a port group and you’ll have to start turning other ports off! Restricting per port group is not enough. McDATA restrict by 32 port blade – fine, but the blades run at 2Gb/s unrestricted anyway. Brocade – not restricted – am I paying for bandwidth I don’t need? Give me lots of ports and a reasonable amount of bandwidth for my money – and let me share it everywhere.
Why does EMC not support ECC on VMware? OK, I guess the Repository and Server components may cause a problem, but the stores – surely they can. What is going on with EMC and acquisitions? I can’t believe it can integrate all of the software from the companies recently purchased – come on, at least ECC on VMware please – they’re both your products.
