Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
/ 2005-09-16 03:29:25 -0400 \ David Bernick: > > >this limit is _per device_ > >so if you want to have 23 TB, you need to configure 6 drbd devices. > >you should use some 64bit arch, of course. > > > >you may be interessted in the "enterprise version" of drbd. > >contact office at linbit. > > > > > i have a 64-bit machine with 16GB of ram, so RAM is not really an issue. > > I understand this is a hardcoded limit, but as this is opensource, if > it's just a matter of changing one line, i'm fine with that. My main > question is: if i change the line that sets 128MB as the maximum size > for metadata, can I use larger devices (12TB or so). there are some other counter values for various things. these may or may not be 32bit integers (well, on your box probably 64bit, so it may not be an issue). if one of them wraps, you are screwed. which ones, and where exactly in the code, and on which storage size I currently just do not know. try it -- I guess on a 64bit arch it may just work. again, this is not tested. my gut feeling is that it will probably break on 32bit archs, and that it may work up to 16TB on 64bit archs. the later limit is just a "feeling", too -- I'd have to carefully read the relevant pieces of code again to be more specific; and first identify which pieces are relevant, of course :-) if it does not work ... oops :-/ -- : Lars Ellenberg Tel +43-1-8178292-0 : : LINBIT Information Technologies GmbH Fax +43-1-8178292-82 : : Schoenbrunner Str. 244, A-1120 Vienna/Europe http://www.linbit.com : __ please use the "List-Reply" function of your email client.