question Re: Can hdfs appendToFile from different node to same file at the same time ? in Archives of Support Questions (Read Only)

Can hdfs appendToFile from different node to same file at the same time ?

jason_huewk — Mon, 15 Aug 2016 17:11:33 GMT

Hi,

May i know hdfs able to append to file using appendToFile from different node to same file at the same time using HDFS latest version ?

Thanks for any guide / advice.

Best Regards,

Jason

Re: Can hdfs appendToFile from different node to same file at the same time ?

emaxwell — Mon, 15 Aug 2016 20:43:07 GMT

@Jason Hue

HDFS only allows one write or append to a file at a time. Allowing concurrent writes would mean that the order of bytes in the file would be random. Even if the two appends write to different blocks, how would you determine which block comes first in the file? It's a difficult problem to solve that has not been done in HDFS.