Thank you very much!! I will try to do that to sync the supervisors in
my cluster.
On 03/05/2015 12:55 PM, Guillermo López Leal wrote:
网易邮箱
El 5/3/2015, a las 18:45, hjh <[email protected]
<mailto:[email protected]>> escribió:
Hi, I need to know exact time delay in storm. For example, I have a
topology like SpoutA->BoltB>BoltC. First I collect the time when
SpoutA emit the tuple, and then in BoltB and BoltC, each will collect
the time when the new tuple arrives and when the tuple is emitted to
the next tuple. In this way, I can get t-SpoutA-Emit,
t-BoltB-NewTuple, t-BoltB-Emit, t-BoltC-NewTuple and t-BoltC-Emit.
Then the process delay and the transmit delay can be calculated. How
ever when I use this method to get the delays, some delays are
negative. For example t-BoltC-NewTuple minus t-BoltB-Emit may be
negative. I use System.currentTimeMillis() to record time. Can
anybody help to figure out why this happens?
Hi there,
We have experienced this on EC2, where we are seeing increasing
processing time over the time in a linear increase. Just use NTP to
sync all your supervisors, and you will be mostly fine (we do have a
cron job each hour).
Cheers,
Guillermo
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