I´m installing a sybase database for the first time.

I have to use raw partitions, but i have no experience with them. I created
the filesystems and them, edit the /etc/sysconfig/rawdevices
ex;
/dev/raw/raw1 /dev/cciss/c0d0p2
when i type the command : raw -qa, i get this output:
/dev/raw/raw1: bound to major 104, minor 2

Is this working?

i have no idea....

best regards

JacK

On Mon, 03 Nov 2003 18:05:37 +0000, John Smith wrote:

That looks about right. Have you tried accessing the raw device from
Sybase (i.e. running disk init against that device?)

Michael
--
Michael Peppler Data Migrations, Inc.
mpeppler (AT) peppler (DOT) org http://www.mbay.net/~mpeppler
Sybase T-SQL/OpenClient/OpenServer/C/Perl developer available for short or
long term contract positions - http://www.mbay.net/~mpeppler/resume.html

Hi,
Also have a look at:

http://info.sybase.com/resolution/de...umber=10877814

Additionally I'd probably do a services rawdevices restart after
making anychanges to the rawdevices file

Kind Regards

Stuart
"Michael Peppler" <mpeppler (AT) peppler (DOT) org> wrote

Are there any advantages to using smaller raw devices over large ones? If I
only have two physical disks, is there any value to using smaller raw
partitions, but more of them, over creating just two raw partitions -- one for
each disk?

On Fri, 02 Jul 2004 10:11:48 -0400, Thomas Gagne wrote:

The usual argument is that there is an advantage to have a larger number
of spindles so that you can spread out the IO over multiple physical
devices. I don't *think* that multiple devices on the same physical disk
is likely to bring any real performance advantages as the IO will still be
performed by a single physical unit.

Michael
--
Michael Peppler Data Migrations, Inc.
mpeppler (AT) peppler (DOT) org http://www.peppler.org/
Sybase T-SQL/OpenClient/OpenServer/C/Perl developer available for short or
long term contract positions - http://www.peppler.org/resume.html

Michael Peppler wrote:

One advantage is that the cylinders in the center of
the platter have a lower average seek time than the
cylinders on the inside & outside edges. I don't know
about Linux, but on AIX you can create physical
partitions with control over where they go on the
platter. You can then create Sybase disk devices to
correspond to these physical partitions, and segments
to correspond to the Sybase devices. You can therefore
put high-I/O tables on segments that are on devices that
are on faster parts of the disk.


Larry Coon
University of California

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