Hello I am looking for advice or suggestions on specking the MDS and OSS for a new file system I am building. The IO patterns as have been explained to me are jobs that either create a big mpeg file or thousands of about 100kb frames for video. This could grow to hundreds of thousands of 100k files. I have specked 2 MDS for a cluster 8x300GB SAS 15k drives for the MDT in a raid 10(I used raid 10 because they were going to have small files and I was trying to mitigate the MDT becoming a bottleneck with many small files) 2x300GB SAS 15k drives for the MGS in a raid 1 1xHostpare 32gb 800mhz ram 3.0 or 2.5 dual quad core procs 4 OSS servers 16GB 667mhz ram 2.5 ghz dual quad core procs 6x1TB SATA 3 7.2k disks 5TB OST in a raid 5 (possibly running software raid) expandable to 2 5TB OSTs Per OSS 1xHotspare Since this is the first Lustre file system I am building. I noticed the sizing page: http://manual.lustre.org/manual/LustreManual16_HTML/SystemLimits.html#50548887_46859 The document mentions only dual core procs in regards to the MDS. The document also mentions a much lower amount of system RAM required for the OST. Am I wasting resources here by over specking these boxes or is it a good idea to over spec a bit? Am I on the right track as far as specking for the IO pattern that will be placed on the file system? Thanks Sebastian