morningman opened a new issue #512: Change BDBJE's duration policy to SYNC
URL: https://github.com/apache/incubator-doris/issues/512
 
 
   Currently, the duration policy of meta data writing in BDBJE is 
WRITE_NO_SYNC, which may lose if system crashed. So we want to change the 
policy to SYNC. Here are some test:
   
   Key: Long
   Value: 200 bytes
   3 node(1 Master, 2 Replicas, SIMPLE_MAJORITY)
   1 write thread
   
   1. Local SATA, Master(SYNC), Replica(SYNC)
   qps: 1632, latency: 0.61ms
   
   2. Local SATA, Master(WRITE_NO_SYNC), Replica(WRITE_NO_SYNC)
   qps: 6868, latency: 0.14ms
   
   3. NVME, Master(SYNC), Replica(SYNC)
   qps: 7140, latency: 0.14ms
   
   4. NVME, Master(WRITE_NO_SYNC), Replica(WRITE_NO_SYNC)
   qps: 7140, latency: 0.14ms
   
   5. SSD Cloud disk, Master(SYNC)
   qps: 440, latency: 2.2ms
   
   
   
   

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