SUMMARY: NFS Sharing: Directories vs. Filesystems First, I'd like to thank the following list members for their time and effort in replying, and their insight and advice: Gregory Shaw Kevin Buterbaugh JV David Foster Anthony Talltree Bevan Broun Jeff van Eek Darren Dunham Tim Villa Wes Garland Sonny Baillargeon Chad Johnson As I suspected, these are/were questions to which there is no single (or easy) answer. There are advantages and disadvantages to all solutions, and what works in one place may not work in another. In other words, "Your mileage may vary." The general consensus is that SVM soft partition fragmentation is potentially detrimental to I/O performance. That degradation in performance can be somewhat mitigated by a hardware RAID device since it [presumably] will spread the load between spindles, minimizing head-thrashing on a single disk. As far as sharing directories vs. sharing filesystems is concerned, I discovered that I was incorrect in assuming that sharing directories was a result of poor design and/or implementation. It seems it's a pretty common occurrence, and there are some advantages to sharing at that level. My implementation: We had a last-minute change in requirements that caused us to modify our original plan. I created a single 447GB sub-mirror using each cluster RAID device (i.e. /dev/did/rdsk/d?s0) and mirrored it at that level. >From there, I created two soft partitions; one is 300GB for our NFS/Samba data, the second is 100GB for Clearcase VOBs. The remaining 47GB is available for growth of the VOBs partition. I had originally intended to make this a very comprehensive summary, but I don't have enough time to devote to it, and I apologize for that. I do hope, however, that someone can make use of the information. Gary Chambers // ------------------------------------- // MIT Lincoln Laboratory / 781-981-0957 // Lexington, Massachusetts // Nothing fancy and nothing Microsoft // ------------------------------------- _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagersReceived on Thu Jan 22 11:04:30 2004
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