We use CA Arcserve R15 with VDDK, we have an IBM DS series SAN, the backup proxy is an x3650 IBM server with a single fibre connection to the san switches. My problem is that the transport mode used is inconsistent. As an example I backed up the same server 10 times which ran in advanced transport mode, over the SAN at about 5.2gb/min.
Than suddenly it would only use NDB getting about 400mb/min no matter what I did. Than it started going over the SAN again but with advanced transport mode disabled, getting about 1.2gb/min. I'm trying to get my testing sorted out so I can put this in production but I'm not having much luck.
Than when i multiplex the job the first server goes over the SAN, whichever gets going first, than all the remaining servers go over the network - each time.
Any help or direction would be appreciated - the esx hosts are 4.1, arcserve R15 proxy on W2k8 and vddk 1.2 writing to LTO4.
Matt