My first post to the list. I want to store 20M of bounded FIFO queues (each queue has at most 50 items, 1KB each). Distribution: 80% of updates at 20% of queues.
Insertion rate: at most 5K per second, random; 50M per day. Reading rate: at most 10K per second, each read reads all 50 items. Once inserted items are not updated. Oldest at each queue is discarded so that queue length <= 50. How much hardware I might need? From my calculations I need at least 1000 HDDs assuming that seek time is at 7ms (high end). And that is unreal number. For this type of load (small random reads/writes) SSD seems to be a perfect match. I'm looking at the following configuration: 5 of OCZ 512GB Vertex 4 drives at 5 64GB RAM boxes. Riak cluster with N=3. I'm going for cheaper drives because I assume that Riak will allow me to replace a node if one of disks suddenly dies. How crazy is this configuration? -- Best regards, Paul Peregud +48602112091
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