Re: Lies and Urban Myths
My previous employer had 2 data centres 25 miles apart. I built active/passive clusters with data mirrored at both sites using Veritas Cluster Server. DWDM between sites providing SAN and WAN bandwidth so we could replicate and heartbeat.
DR testing was a a simple matter of failing over the cluster. We could run from either site and swapped between the 2 on a regular basis to prove DR worked. This was over 10 years ago. The same infrastructure also allowed us to run backups from the passive and active site giving you instant on-site and off-site backups
The solutions these days seem to frown on a high cost but highly resilient solution like this. Sadly this applies to the systems replacing the ones I put in. Nowhere near as resilient and no chance of running from either site to prove DR.