Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Thu, Jun 26, 2014 at 09:12:40AM -0400, Allen Chen wrote: > >When replying, please edit your Subject line so it is more specific > >than "Re: Contents of drbd-user digest..." Learn To Quote ^^^ > >This is host based mirroring. > >md raid1 is meant to do that. > >Why not use it? > > > >Oh, so you want it async... > >Did you know about mdadm "write-mostly" and "write-behind"? > > > >It's not that DRBD cannot do it. > >It's just that I think it is the wrong tool for the job. > >So please explain to me why you think otherwise. > > > > Lars > > > Hi Lars, > > Here is my explanation to use DRBD instead of md raid1: > for md raid1, if one member is physically removed from the machine, > and after you reconnect the same disk to md raid1, MD will re-sync > everything to it. It takes much more time. meet mdadm --grow --bitmap internal -- : 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