We are starting designing a cluster and come up with the following optimal configuration . Please suggest if there is any scope for improvement or save some budget if it is over optimized.
- 100 fields - 1 MB per field(including inverted index) - 125 MB( to be safer side) per document Total - 4M documents corresponds to 500 GB - 25GB per shard - 20 shards - total 40 shards including ( r = 1) - we had seen somewhere a shard size of 25GB works well in most of the scenarios.
- Also it seems heap max 32 GB per each shard RAM) ( jvm uses compressed pointers ) works well - which translates to 64 GB (rest 50% for FS cache) .So , considering 256 GB RAM - this translates 2 shards per machine (128GB) - this translates 20 Data nodes per cluster(2 shards per each data node ) , 3 master nodes (HA ) , 1 coordinating node
Please add your recommendations