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, Jul 24, 2008 at 10:12:47AM +0100, Lee Christie wrote:
> > > DRBD 8.0.x, 8.2.6:
> > > 32bit kernel:
> > > 4 TB hard limit per device
> > > you can have several of them, but you probably run into some
> > > other limit pretty fast.
> > > 64bit kernel:
> > > 4 TB "supported".
> > > (unsupported theoretically) 16 TB hard limit per device,
> >
> > I just tried that myself out of curiosity.
> > it works up to "only" 8 TB per device on 64bit kernel.
> > anything bigger will oops sooner or later.
> >
> > again: maximum 8 TB per device -- or crash is imminent.
> >
> > therefore we will restrict drbd-8.2.7 (8.0.13)
> > to refuse anything bigger than that.
>
> I might be naive here but surely with a 64bit kernel it should be
> possible to go over 8TB and if you cannot then there must be a bug
> somewhere ?
no, not a bug. but a
"shortcoming of the current implementation."
as I said:
> we plan to increase the limit on DRBD+ up to 128 TB (or even
> "arbitrary") per device "soonish".
> once that is done, the current DRBD+ code will be migrated,
> which would make 16 TB per device supported in 64bit "plain"
> DRBD 8.2.y, where y is several steps larger than 6.
this remains true, however.
--
: Lars Ellenberg http://www.linbit.com :
: DRBD/HA support and consulting sales at linbit.com :
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