On 15/05/14 11:36, Tyler Wilson wrote: > Hey All, > > I am setting up a new storage cluster that absolutely must have the best > read/write sequential speed @ 128k and the highest IOps at 4k read/write > as possible. > > My current specs for each storage node are currently; > CPU: 2x E5-2670V2 > Motherboard: SM X9DRD-EF > OSD Disks: 20-30 Samsung 840 1TB > OSD Journal(s): 1-2 Micron RealSSD P320h > Network: 4x 10gb, Bridged > Memory: 32-96GB depending on need > > Does anyone see any potential bottlenecks in the above specs? What kind > of improvements or configurations can we make on the OSD config side? We > are looking to run this with 2 replication. > > Thanks for your guys assistance with this. On thing that comes to mind is write endurance for the Samsung drives: Samsung 840 Pro: (http://www.samsung.com/us/pdf/memory-storage/840PRO_25_SATA_III_Spec.pdf) For enterprise applications, 5 years limited warranty assumes a maximum average workload of 40GB/day (calculated based on host writes and on the industry standard of 3-month data retention). Workloads in excess of 40GB/day are not covered under warrant Compare with Intel DC3700 (http://www.intel.com/content/dam/www/public/us/en/documents/product-specifications/ssd-dc-s3700-spec.pdf) 10 drive writes per day for 5 years I'm not trying to be an Intel sales guy here, but I'd be wary of using the Samsung 840 for a (busy) server based workload - 40G of data churn per day is not a great deal. Regards Mark
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