Hi Henry,
> 1. I have heard a idempotent way but I do not know how to implement it,
would you please enlighten me about it by a example?
It's a property of the result data. For example, you can overwrite old
values with new ones using a primary key.
> 2. If dirty data are *added* but not updated
Hi Hequn,
Thanks a lot for your response. I have a few questions about this
topic. Would you please help me about it?
1. I have heard a idempotent way but I do not know how to implement it,
would you please enlighten me about it by a example?
2. If dirty data are added but
Hi Henry,
Yes, exactly once using atomic way is heavy for mysql. However, you don't
have to buffer data if you choose option 2. You can simply overwrite old
records with new ones if result data is idempotent and this way can also
achieve exactly once.
There is a document about End-to-End Exactly-O
Hi
I am reading the book “Introduction to Apache Flink”, and in the book
there mentions two ways to achieve sink exactly once:
1. The first way is to buffer all output at the sink and commit this
atomically when the sink receives a checkpoint record.
2. The second way is
