Software to allow multi-disk filesystem

Software to allow multi-disk filesystem

Post by Rumi Duba » Thu, 23 Jan 1992 02:58:32



Hi,
  I am looking for software (public domain, research, commercial)
that will allow UNIX file system to span across multiple disks.
This is essential with respect to the large amount of seismic data
needed in our application.
  Any pointers, suggestions on where I can obtain it will be
appreciated.
  Thanx
Rumi Dubash


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Software to allow multi-disk filesystem

Post by Brian Cas » Thu, 23 Jan 1992 08:37:25



>Hi,
>  I am looking for software (public domain, research, commercial)
>that will allow UNIX file system to span across multiple disks.
>This is essential with respect to the large amount of seismic data
>needed in our application.
>  Any pointers, suggestions on where I can obtain it will be
>appreciated.
>  Thanx
>Rumi Dubash


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>**************************************************************************

>USMail: 5858 Westheimer #800
>        Houston, Tx 77057

Certain versions of UNIX (notably AIX 3 on IBM RS6000's and Convex UNIX)
allow multiple disk filesystems, although they cannot exceed the 2Gb UNIX
filesystem size limit.

 
 
 

Software to allow multi-disk filesystem

Post by Kathy Sk » Fri, 24 Jan 1992 00:41:48


|> Hi,
|>   I am looking for software (public domain, research, commercial)
|> that will allow UNIX file system to span across multiple disks.
|> This is essential with respect to the large amount of seismic data
|> needed in our application.
|>   Any pointers, suggestions on where I can obtain it will be
|> appreciated.

EP/IX, Control Data's enhanced Unix, which runs on the Control Data
4000 product line.  On EP/IX, file systems and disk partitions can
exceed the standard Unix(r) limitation of 2 gigabytes.  The virtual
disk extensions that have been made in EP/IX make it possible for the
file systems/partitions to approach 1 terrabyte in size.   Individual
files are still limited to 2 GB in size. The file system utilities like
fsck, dump and resore will accomodate the large file systems.

Of course, the standard disclaimer applies.
----------------------------------------------------------------------

  Advanced Systems Product Support     | phone:   612-482-2923
  Control Data Corporation             | fax:     612-482-4203

 
 
 

Software to allow multi-disk filesystem

Post by Terry Lyo » Fri, 24 Jan 1992 05:40:17




>>Hi,
>>  I am looking for software (public domain, research, commercial)
>>that will allow UNIX file system to span across multiple disks.
>>This is essential with respect to the large amount of seismic data
>>needed in our application.
>Certain versions of UNIX (notably AIX 3 on IBM RS6000's and Convex UNIX)
>allow multiple disk filesystems, although they cannot exceed the 2Gb UNIX
>filesystem size limit.

        Hmmm try Data General's stuff ... visited there 4
months ago one of there systems has : RAM LIMIT = 700meg
        and a DISK LIMIT ~= 2terra
        made just for large data projects eg:satalite data
        terry

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Software to allow multi-disk filesystem

Post by Dave Shav » Fri, 24 Jan 1992 14:32:20



>Certain versions of UNIX (notably AIX 3 on IBM RS6000's and Convex UNIX)
>allow multiple disk filesystems, although they cannot exceed the 2Gb UNIX
>filesystem size limit.

While it is true we've supported disk striping for a long time, we now also
support large files as well as large file systems up to one terabyte in
size.  (Large file support first appears in ConvexOS 10.0) For details see,
"An Implementation of Large Files for BSD UNIX" written by myself, E.
Schnoebelen, and G. Bier in the Winter '92 USENIX proceedings.  (Or snag me
at the conference during the next few days.  ;-)

/\  Dave Shaver
\\  CONVEX Computer Corporation, Richardson, TX

 
 
 

Software to allow multi-disk filesystem

Post by Ruth Miln » Sat, 25 Jan 1992 08:13:37





>>>Hi,
>>>  I am looking for software (public domain, research, commercial)
>>>that will allow UNIX file system to span across multiple disks.
>>Certain versions of UNIX (notably AIX 3 on IBM RS6000's and Convex UNIX)
>>allow multiple disk filesystems, although they cannot exceed the 2Gb UNIX
>>filesystem size limit.

>        Hmmm try Data General's stuff ... DISK LIMIT ~= 2terra [sic]

This is fine if the data is only going to be used locally. ConvexOS 10.0 will
support filesystems over 2GB, and Sun has a product which does that as well.
(I forget what it's called; it was briefly mentioned during a panel at SUG
last month. It does a form of striping. Call your salesperson for details.)

However, if you need to export it across NFS, you're stuck with 2GB anyway.
NFS can't address beyond that point.
--
Ruth Milner                          NRAO/VLA                  Socorro NM

 
 
 

Software to allow multi-disk filesystem

Post by Bob Goudre » Sun, 26 Jan 1992 02:23:16





>>>Certain versions of UNIX (notably AIX 3 on IBM RS6000's and Convex UNIX)
>>>allow multiple disk filesystems, although they cannot exceed the 2Gb UNIX
>>>filesystem size limit.

>>        Hmmm try Data General's stuff ... DISK LIMIT ~= 2terra [sic]

>This is fine if the data is only going to be used locally. ConvexOS 10.0 will
>support filesystems over 2GB, and Sun has a product which does that as well.
>(I forget what it's called; it was briefly mentioned during a panel at SUG
>last month. It does a form of striping. Call your salesperson for details.)

>However, if you need to export it across NFS, you're stuck with 2GB anyway.
>NFS can't address beyond that point.

You're confusing file system size with file size.  Yes, it's true
that NFS semantics only support *file* sizes up to 2 GB.  But there is
nothing in DG/UX to prevent you from creating a logical disk much larger
than that (you can allocate up to 32 separate disk pieces, each of which
can be on a different physical disk if you choose; and you can stripe
them for added performance), making a file system on that logical disk,
and then exporting that file system for NFS clients to mount.  The
theoretical DG/UX file system size limit is indeed 2 terabytes (4
giga-blocks), although the current practical limit is only 128 GB, since
the highest capacity physical disks we currently offer (which are
actually RAID arrays) are 4 GB.

----------------------------------------------------------------------
Bob Goudreau                    Data General Corporation

+1 919 248 6231                 Research Triangle Park, NC  27709, USA

 
 
 

Software to allow multi-disk filesystem

Post by Andrew Knuts » Sun, 26 Jan 1992 08:41:47



>  I am looking for software (public domain, research, commercial)
>that will allow UNIX file system to span across multiple disks.
>This is essential with respect to the large amount of seismic data
>needed in our application.

        Veritas ((408)727-1222) makes a layered product with provides
striping, mirroring, hot reconfiguration and other nice stuff for several
UNIXes, including SCO.  I have not used the product though.

Andrew
--
--------

Santa Cruz Operation      (408) 425-7222 x7538

 
 
 

1. Multi-disk filesystem

Try DiskSuite. It allows you to create logical volumns with multiple physical
volumns.

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