Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Todd Denniston wrote: > > Nate Carlson wrote: > > <SNIP> > > Just leave 128mb available on each disk? > > > _in_ each _partition_ used by drbd, or _as_ a separate _partition_ for each > drbd partition. > > I plan that when I update ours, I will add a separate hard disk to the > system which will be just used for drbd metadata partitions, so I don't have > to worry about did I tell 0.6 config the correct amount smaller, or remember > to up the size in the drbd config when I go to 0.7. > Question: In the systems that have been having trouble getting the speed they want out of 0.7, has anyone tried putting the metadata on a separate physical disk (not in the same RAID either)? Reason: Although I have not read the code, I suspect that a write in 0.7 (as seen by the lower level device with ext3 on top of drbd) might go something like: seek & write to filesystem location seek & write to filesystem journal location (this might happen first) seek & write to drbd metadata location and I expect the metadata will require a big seek, even on a RAID. -- Todd Denniston Crane Division, Naval Surface Warfare Center (NSWC Crane) Harnessing the Power of Technology for the Warfighter