Re: [ogfs-users]>2TB filesystems

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On Monday 22 December 2003 09:33 pm, Franco Broi wrote:
> On Tue, 2003-12-23 at 10:48, Brian Jackson wrote:
> > On Monday 22 December 2003 08:01 pm, Franco Broi wrote:
> > > On Tue, 2003-12-23 at 09:26, Franco Broi wrote:
> > > > I thought I'd sussed it when I realised I hasn't activated the ldb
> > > > option before building the kernel, but it still didn't seem to make
> > > > any difference. I'm going to try a vanilla 2.4.23 kernel with the lbd
> > > > patch just in case there was a good reason why no patch is available
> > > > for 2.4.22.
> > >
> > > With 2.4.23 I've managed to create a 4TB SW RAID 0 partition, but
> > > there's no dm or ogfs patches available for this kernel...
> >
> > use the 2.4.22 ogfs patch, and the 2.4.23-pre7 device mapper patch, they
> > should apply cleanly, or if you're really interested, I can let you see a
> > preview of 2.4.23-ogfs1 ;)
>
> Sorry to be so dense, but where can I find the 2.4.23-pre7 dm patch? I
> don't see it in the device-mapper.1.00.07/patches directory.

My fault, I meant to put a pointer to the patches in the last email.

http://people.sistina.com/~thornber/patches/2.4-stable/2.4.23-pre7/

--Brian Jackson

>
> > --Brian Jackson
> >
> > > > Here is my dilemma. I've got some big but slow IDE RAID systems (>4TB
> > > > each). My Adaptec SCSI cards can't see devices > 2TB so I've made a
> > > > bunch of 2TB RAID partitions. I now want to stripe across 2 or more
> > > > RAIDS to get some speed and to present large as possible filesystems
> > > > for users.
> > > >
> > > > If I stripe on the storage server I then have the problem of getting
> > > > the devices visible to the clients. I'm currently using 1Gig Ethernet
> > > > but our main network is 2Gig Myrinet (soon to be 10 Gig Infiniband).
> > > > I'm pretty sure I would have problems exporting a large block device
> > > > using HyperSCSI or NBD, so I figured I could do the striping on the
> > > > client, this also give me the option to stripe across multiple
> > > > storage servers (if I want to). BTW, HyperSCSI doesn't work over
> > > > Myrinet... and I don't want to use iSCSI because of the TCP/IP
> > > > issues. Anything using sockets would probably be OK as most
> > > > networking solutions have some underlying protocol which can make
> > > > them go fast - like sockets direct.
> > > >
> > > > Using 2.6 would probably be my best bet, but there's no ogfs, Myrinet
> > > > or HyperSCSI for 2.6 (yet), etc, etc.
> > > >
> > > > I don't mind looking at EVMS, but all I really want is some way to do
> > > > striping, and to label the devices.
> > > >
> > > > What do you think?
> > > >
> > > > A quick comparison of software RAID vs LVM striping show pretty
> > > > similar performance. I guess if they are both using dm, they would
> > > > have to be.
> >
> > <snip>


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