Thread: Two types of writes in HDFS

Please explain what are the two types of ‘writes’ in HDFS?

Originally Posted by rohan

Please explain what are the two types of ‘writes’ in HDFS?

The two types of writes are:

There are mainly two types of writes in HDFS: posted and non-posted write.

1) Posted Write is when we write it and forget about it, without worrying about the acknowledgement. It is similar to our traditional Indian post.

2) In a Non-posted Write, we wait for the acknowledgement. It is similar to the today’s courier services. Naturally, non-posted write is more expensive than the posted write. It is much more expensive, though both writes are asynchronous.