Access File through multiple threads

Question

I want to access a large file (file size may vary from 30 MB to 1 GB) through 10 threads and then process each line in the file and write them to another file through 10 threads

Answer 1

One of the possible ways will be to create a single thread that will read input file and put read lines into a blocking queue. Several threads will wait for data from this queue, process the data.

Another possible solution may be to separate file into chunks and assign each chunk to a separate thread.

To avoid blocking you can use asynchronous IO. You may also take a look at Proactor pattern from Pattern-Oriented Software Architecture Volume 2