Many thanx to Nelson Caparroso, Al Hopper, Chris Conner, and Doug Otto. There are no consensus, it depends on the application's throughput requirements with OLTP generally having much lower requirements than something like data-warehousing. Industry recommendations vary between 3 and 8 hosts per FA. Chris recommends Orca and the SE toolkit for monitoring throughput. Nelson mentions that you generally saturate your CHIPS before your backend ACPs, and that you should monitor these with GraphTrak PC, as well as that he has got a single E3800 driving 4 FAs at 320MB/sec by using DMP. My original posting follows. _Johan -----Original Message----- From: jhartzen@csc.com [mailto:jhartzen@csc.com] Sent: Friday, January 11, 2002 3:54 AM To: sunmanagers@sunmanagers.org Subject: How many UNIX systems per HDS port via SAN? Hi again gurus, How many ports do you use on your HDS system, connected to a SAN with multiple Sun systems wanting to access different LUNs target/loop IDs on the HDS? From the statistics I see, the fibre-chanel will easily handle about 6 to 7 UNIX systems' worth of disk throughput on a single 1000mbps link. I'm using Veritas DMP to get aggregated bandwidth across multiple paths. The "systems" are primarily E10K domains, with a small number of E3500/E4500 systems targeted for future connection to the SAN. I'm using JNI HBAs and a collection of Brocade Silkworm and Inrange Directors make up the SAN. Thanx, _Johan _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Tue Jan 22 17:57:39 2002
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