On Aug 12 2007 09:39, david@xxxxxxx wrote: > > now, I am not an expert on either option, but three are a couple things that I > would question about the DRDB+MD option > > 1. when the remote machine is down, how does MD deal with it for reads and > writes? I suppose it kicks the drive and you'd have to re-add it by hand unless done by a cronjob. > 2. MD over local drive will alternate reads between mirrors (or so I've been > told), doing so over the network is wrong. Certainly. In which case you set "write_mostly" (or even write_only, not sure of its name) on the raid component that is nbd. > 3. when writing, will MD wait for the network I/O to get the data saved on the > backup before returning from the syscall? or can it sync the data out lazily Can't answer this one - ask Neil :) Jan -- - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
