# `TiDB/TiKV` can be Optimized for Cloud
+ `TiDB` keeps the `I/O` throughput and volume queue length under control
  + Optimized storage engine for `Raft` logs
    + Reduced `20%~30%` total write `I/O` throughput 
  + Rate limiter for background jobs
  + Rate limiter for write `I/O`
  + Slow node eviction
+ Support using separate disk volumes for `Raft` log and data

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