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- Timestamp:
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Jul 27, 2010, 9:40:50 PM (15 years ago)
- Author:
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jazz
- Comment:
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| 7 | 7 | * [benchmark] [http://wiki.github.com/brianfrankcooper/YCSB/ Yahoo! Cloud Serving Benchmark (YCSB)] - [http://research.yahoo.com/node/3202 論文: Benchmarking Cloud Serving Systems with YCSB] |
| 8 | 8 | * Yahoo 寫的效能測試軟體,YCSB 1.2 版支援 HBase, Cassandra, MongoDB |
| 9 | | * 從[ 投影片]得到的結論注意到幾件事情: |
| 10 | | * HBase 寫入快,但讀取會稍微慢一點。(寫入記憶體,查詢時重建紀錄) |
| 11 | | |
| | 9 | * 從[http://www.brianfrankcooper.net/pubs/ycsb-socc-talk.ppt 論文簡報投影片]得到的[http://www.brianfrankcooper.net/pubs/ycsb-v4.pdf 結論]注意到幾件事情: |
| | 10 | * 若資料庫特性是一半讀一半寫,MySQL 大約在 7500 operations/sec 時會到達效能極限。若資料庫特性是 95% 讀 5% 寫,就沒看到明顯效能極限。 |
| | 11 | * HBase 寫入飛快,但讀取會稍微慢一點,而且讀取的效率不太線性。(寫入記憶體所以超快,但成本也比較高,查詢時重建紀錄) 加機器時,不會有明顯的效能差異 (跟 HDFS 一樣,要跑 balancer 才會搬資料)。 - Low Update Latency, Higher Read Latency |
| | 12 | * Cassandra 寫入稍微慢一點,讀取則比 HBase 快,特別是資料庫特性是 95% 讀取時比 HBase 快。 |
| 12 | 13 | |
| 13 | 14 | == Embedded : Security == |