I want to write a big file, but the file is from 1000 blocks, also the blocks are from network. so I think better not doing that in a sequential manner like:

• first read all blocks or wait until block ready to write like 0,1,2,3,4,…wait 5 to come

I want to do like this:

• preallocate 1000Mb file
• spawn 1000 processes to get the blocks
• if block 51 ready then write 51 to 51*1MB offset
• do this until write all.

Question:

• does Elixir support pre allocate?
• can I write to same file at diff offset simultaneously without locking issue?