??????????Async I/O??exactly-once

Tue, 03 Sep 2019 21:59:22 -0700 

??????????????????io?????????????????????? 
??????????????????????????????????????????at least once??????????The 
asynchronous I/O operator offers full exactly-once fault tolerance guarantees. 
It stores the records for in-flight asynchronous requests in checkpoints and 
restores/re-triggers the requests when recovering from a failure.

????????iPhone


------------------ ???????? ------------------
??????: Dino Zhang <[email protected]&gt;
????????: 2019??9??4?? 09:20
??????: user-zh <[email protected]&gt;
????: ??????????Async I/O??exactly-once



hi star,

exactly-once??flink??????????????end-to-end
exactly????????????????????????????TwoPhaseCommitSinkFunction????????????????

On Wed, Sep 4, 2019 at 8:20 AM star <[email protected]&gt; wrote:

&gt; 
??????????????????????????????????????????????failover??????????????????????????????????????????????????????????????????????????????????????????????????????????at
&gt; least-once??????
&gt; ????ck1:??????a b 
c????????????????????????ck2????????d??e??f??????ck1??????checkpoint??a 
??b??????????c??????.
&gt;
&gt;
&gt; 
ck2????????e????????????cancel??????c??d??????????????????????????????????????????????????ck1??????c??d????????????????????????
&gt;
&gt;
&gt; ????
&gt;
&gt; ????????iPhone



-- 
Regards,
DinoZhang

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