On 12/12/11 6:43 AM, Digimer wrote: > I handle this by setting up two servers running DRBD in active/active > with a simple two-node red hat cluster managing a floating IP address. > The storage network link uses a simple Active/Passive (mode=1) bond with > either link go to separate switches. DRBD with synchronous writes? doesn't that slow things down considerably? if its asychronous, recently written data will be lost on a failure. proper storage appliances implement a shared cache between the master and standby storage controllers so that if the master fails, the standby has all data, including cached writes. as far as I know, there's no way to easily implement this with open source, its part of the secret sauce of proper redundant storage. without this, its not safe to run a transactional database server on your storage -- john r pierce N 37, W 122 santa cruz ca mid-left coast