The case for Direct I/O - why it matters for high performance storage

Hello everyone, Recently I published on GitHub HedgeDB , my high-perf and persisted Key-Value store. Internally, it uses Direct I/O ( O_DIRECT ) almost everywhere. In this article I explain the reasons behind this choice, also motivated from some fun experiments I had with fio that you can find in the article. and some consideration about the page cache. submitted by /u/IlPresidente995 [link] [留言]