A bunch of good responses. A couple actually had some simple test results for large file copies (which happens to be our application). Original question at end. Thanks to: Kevin Buterbaugh Tim Chipman Paul Galjan Dennis Martens Wanke Matthias Adam Levin Multiple considerations in the answers: The hardware in the two are almost identical in most respects. The A1000, of course, has a hardware RAID controller. However, the D1000 has two separate SCSI controllers. Assume both RAID 5: Reads: should be comparable Writes: the A1000 is more than twice as fast as the D1000 However, if both SCSI channels are connected through a dual channel SCSI controller on the server, then the D1000 could be faster on reads, although it would depend on the read pattern. A single large file would be the same, but multiple reads across both controllers would obviously be faster. With the dual channel SCSI, we could configure two RAID 0 and mirror them. That would be fast, would protect the data, but would have less storage capacity. In either case, if the file transfers are going to/from PC workstations, then the network is likely to be the bottleneck, so speed differences between the two become almost irrelevent. Newer devices (e.g. T3) are significantly better, with more up-to-date RAID controllers and Fiber Channel Drives; but, obviously, cost a lot more. For some applications and budgets that would be worth looking at, but with our limited budget and the potential for the network being the bottleneck, it wouldn't pay off. --------------- Chris Hoogendyk -- O__ ---- Network Specialist & Unix Systems Administrator c/ /'_ --- Library Information Systems & Technology Services (*) \(*) -- W.E.B. Du Bois Library ~~~~~~~~~~ - University of Massachusetts, Amherst <choogend@library.umass.edu> --------------- -------- Original Message -------- Subject: performance diff betw A1000 & D1000 Date: Wed, 13 Nov 2002 17:15:31 -0500 From: Chris Hoogendyk <choogend@library.umass.edu> Reply-To: choogend@library.umass.edu Organization: UMass Library To: Sun Managers <sunmanagers@sunmanagers.org> If we are talking about a non-critical storage need with limited use but large size and for which i/o performance is not a huge deal .... What would you expect to see as a difference in performance between the A1000 and the D1000 configured maxed out with 12 36GB drives? The specific application would be file sharing to a PC desktop via samba to store scanned archival images. Is the A1000 going to be twice as fast? one and a half times as fast? 25% faster? ... In either case, it would be attached to an E250. --------------- Chris Hoogendyk -- O__ ---- Network Specialist & Unix Systems Administrator c/ /'_ --- Library Information Systems & Technology Services (*) \(*) -- W.E.B. Du Bois Library ~~~~~~~~~~ - University of Massachusetts, Amherst <choogend@library.umass.edu> --------------- _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Thu Nov 14 15:52:05 2002
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