Re: How the ack sent back to upstream of a pipeline when write data to HDFS

[Charles Lamb]

On 3/13/2015 7:55 AM, xiaohe lan wrote:
Hi experts,
When HDFS client sends a packet of data to a DN in the pipeline, the packet
will then be sent to the next DN in the pipeline. What confuses me is when
the ack from a DN in the pipeline will be sent back ? In which order ? It
is sent from the last to first or in other ways ?

Thanks,
Xiaohe
Hi Xiaohe,

Take a look at figure 3.2 in 
https://issues.apache.org/jira/secure/attachment/12445209/appendDesign3.pdf.

IHTH.

Charles