Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Threaded View
HDFS, mail # user - DFSOutputStream.sync() method latency time


Copy link to this message
-
DFSOutputStream.sync() method latency time
lei liu 2013-03-28, 08:15
When client  write data, if there are three replicates,  the sync method
latency time formula should be:
sync method  latency time = first datanode receive data time + sencond
datanode receive data  time +  third datanode receive data time.

if the three datanode receive data time all are 2 millisecond, so the sync
method  latency time should is 6 millisecond,  but according to our our
monitor, the the sync method  latency time is 2 millisecond.
How to calculate sync method  latency time?
Thanks,

LiuLei