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 4:34 PM, Lars Ellenberg <lars.ellenberg at linbit.com> wrote: > On Tue, Jul 22, 2008 at 12:01:48PM +0200, Lars Ellenberg wrote: >> On Tue, Jul 22, 2008 at 05:03:23PM +0800, Patrick Coleman wrote: >> > Hi, >> > >> > I've googled around for a while, and I can't find anything definitive >> > for or against - what is the maximum volume size supported by DRBD? >> > >> > I'm running an 11TB DRBD 8.2.6 volume between two nodes, connected by >> > 10GE. I've hit some odd issues (OOPSes, continually resyncing data) >> > and I'd like to eliminate the volume size as a cause of the issue. >> >> >> 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. Cool. Just to clarify - the 8TB limit is global or per resource? That is, can I safely have two 6TB devices (assuming I have sufficient memory to handle the bitmaps)? Cheers, Patrick -- http://www.labyrinthdata.net.au - WA Backup, Web and VPS Hosting