logging to disk latency problem

[rndmania]

I use winston for logging access log of web server to file

if TPS of webserver lower than 3500 TPS, logging well without latency
but, TPS higher than about 3500 TPS,
logging latency increased and log is jumbled
for example,
2014-07-30T14:26:02.496Z - info:
2014-07-30T14:27:01.573Z - info:
2014-07-30T14:26:02.497Z - info:
2014-07-30T14:27:01.573Z - info:
2014-07-30T14:26:02.497Z - info:
2014-07-30T14:27:01.573Z - info:

so, i try logging synchronously using fs.AppendFIleSync()
then logging well over the 10k TPS

how to logging without jumble, latency using winston on high concurrency environment

Env : AWS EC2 (c3.2xlarge)
Node : 0.10.5
winstone : 0.7.3

[indexzero]

Duplicate of #288.