original question:
we are discussing how to realize a backup computer center. All our production
server are now clustered with ASE using FWD SCSI.
Do you have experiences with SCSI extenders (SCSI to fiber) to increase the
distance between the hosts in this environment?
Could one then simply move one member of the cluster to a different location
2000m away?
How is the timing/bandwidth of such devices?
Does it affect ASE?
+++++++++++++++++++++++++++
Thanks to
rpoblete_at_gmd.com.pe
Jef_at_bhe.com
No supported solutions seems to be available for ASE at the moment and the
general opinion is that scsi over fiber is not stable enough to run a cluster.
According to Digital, even with the new StorageWorks fiber products (HSG80,
...) support for ASE is not in sight.
However, we had contact with the Digital Competence Center at SAP and they have
a "small" solution ready to run and supported:
1. Use a Standby Database at the remote location and ship all archived redologs
to that database. Do frequent recoveries of that database with the redologs.
2. With no. 1, you could loose the online redolog, the redolog that is in the
process of being archived and the log that is shipped to the remote location.
To eliminate that risc they propose to mirror the archive and log filesystems
via fiber.
Please contact me if you are interested in details.
Thanks,
Peter
Peter Braack
Unix System Administrator
Degussa AG, Frankfurt, Germany
Peter.Braack_at_degussa.de
Received on Thu Jul 23 1998 - 13:24:05 NZST