Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
My customer has been using remotely backup for years with 3-node setup but without DRBD Proxy AND DRBD>8.3.2 its usage was restricted. Recently it introduced both and remote replication became possible and it works greatly with effective 10Mbps line and avarage round trip time (measured by ping) 0.8ms. > The subject says it all, is DRBD replication possible > between two nodes at different geographical locations ? If your WAN line has very good quality (broad bandwidth and low latency --- round trip delay) AND storage size is not so large AND protocol A is adequate, no DRBD Proxy would be required. DRBD Proxy can compress packet contents and it offers large buffer. If your storage size is large (my customer's case: 1TB) when connection is made first phase of DRBD (exchanging bitmap) took more than few minutes and during this phase all disk write is suspended with DRBD < 8.3.2. Using use-rle option (DRBD>=8.3.2) it shortened to less second! Best Regards, Motoharu Kubo