home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.unix.admin
- Path: sparky!uunet!timbuk.cray.com!walter.cray.com!bard.uk.cray.com!cd
- From: cd@bard.uk.cray.com (Chris Dickson)
- Subject: Re: FDDI, 20+GB unix file partitions, Remote NFS mount IBM to Sun, etc.
- Message-ID: <1993Jan21.121428.6925@walter.cray.com>
- Lines: 34
- Nntp-Posting-Host: bard.uk.cray.com
- Organization: Cray Research (UK) Ltd
- References: <1993Jan17.000702.5794@Princeton.EDU> <1993Jan19.233642.18807@siemens.com>
- Date: 21 Jan 93 12:14:27 CST
-
- In article <1993Jan19.233642.18807@siemens.com>, aad@siemens.com (Anthony Datri) writes:
- |> >(1) Is there any way to increase the size of a file partition from 2GB (to
- |> >20 - 50 GB, for example) in Unix OS?
- |>
- |> On a typical machine, the filesystem calls (eg., fseek) take signed 32-bit
- |> arguments -- hence the limit. To deal with bigger files/filesystems, you
- |> need system calls that take bigger types as arguments. If you change the
- |> existing calls, you'll break existing binaries and probably lots of source,
- |> too. One way of doing this is to have a || set of calls that handle
- |> 64-bit offsets -- fseek64, say. Of course, this means that utilities have
- |> to be modified to work. This description is incomplete and probably
- |> inaccurate. If you ask on comp.sys.convex I'm sure you'll get a better
- |> descripton of how they did it.
- |>
- Large files/filesystems are no problem if your server has a 64-bit architecture
- anyway. I'm not sure whether they are implemented on all 64-bit machines, though
- (they are on ours, you would have to check for RS6000 , alpha etc ).
-
- I must admit that a Sun fseek > 2Gb into a file on an NFS mounted Cray
- filesystem would not work - this is limited by the size of the original argument.
- I can't see any way round this without adding/changing code on the client side.
-
-
- |> >(6) Are there any products/vendors out there who make high speed unix
- |> >file servers of 500GB and more (per server)?
- |>
-
- Cray make unix file servers which can access up to 2Tb of disk + more or less
- unlimited 'dmf migrated' data which is offline but still accessible using normal
- unix system calls ( over NFS or whatever ). Speed would normally be network-
- limited for any kind of network except HIPPI.
-
-
-
-