Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Fri, Feb 13, 2009 at 10:55:50AM +0100, Julien Reveillet wrote: > I want the replication as synchronous as possible but as we're doing with a wan > network... > I know about the mysql replication which is true and is what we need but, we > need to pay a very expensive licence to the developper for this so i wanted to > find another cheaper solution. As i have no more choices, i will probably do > with it. you have to pay for a built-in feature of a GPL'd data base server? I'm sure I am missing something here. > - Will protocol C cause many heavy lags on my production server ? > (i guess yes but...) > > > the replication link is 2 megabit/second, > which is roughly 200 kByte per second. > and the latency is what? 200 msec? > well, DRBD cannot magically improve those numbers. > I don't think that would be feasibly for a cluster file system. > and not at all for a data base on top of a cluster file system. > > > I do not expect Drbd to be Harry Houdini... ;-) but i thought it can work if > protocol A was useable with both primary nodes. no. it is not. it won't. and it's not even DRBD per se, that will make it unusable, but the idea of using a cluster file system via a WAN link. -- : Lars Ellenberg : LINBIT | Your Way to High Availability : DRBD/HA support and consulting http://www.linbit.com DRBD® and LINBIT® are registered trademarks of LINBIT, Austria. __ please don't Cc me, but send to list -- I'm subscribed