Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On Tuesday 23 March 2010 22:57:39 Christian Iversen wrote: > Well, there's that. But the *primary* can't change anything either! Data > would change while the filesystem expects it not to. Even if you somehow > disable all caching (which you can't do without changing the kernel), > you would STILL get serious data corruption errors, because of the many > possible race conditions. > > > It's not wise, but it's not impossible, either. > > It is impossible, though. Unless NEITHER node ever change the data. And > in that case, you might as well just copy it out once and for all. If one really wants to read on the secondary there's an easy way: put DRBD on top of LVM and create a snapshot and mount that ro. Works just as one would expect including the absolutely obvious side effects of working with a snapshot like having to recreate it to get updated data. And even the sysadmin two generations from now will immediately understand this. Regards, Stefan