| | 1 | = 測試 hdfs - fuse = |
| | 2 | |
| | 3 | * 已知問題(讀與寫的效能都比原生dfsclient低) |
| | 4 | |
| | 5 | 1. if you alias ls to ls --color=auto and try listing a directory with lots (over thousands) of files, expect it to be slow and at 10s of thousands, expect it to be very very slow. This is because --color=auto causes ls to stat every file in the directory. Since fuse-dfs does not cache attribute entries when doing a readdir, this is very slow. see HADOOP-3797 |
| | 6 | |
| | 7 | 2. Writes are approximately 33% slower than the DFSClient. TBD how to optimize this. see: HADOOP-3805 - try using -obig_writes if on a >2.6.26 kernel, should perform much better since bigger writes implies less context switching. |
| | 8 | |
| | 9 | 3. Reads are ~20-30% slower even with the read buffering. |
| | 10 | |
