After my earlier experiments with B2, I had an extremely interesting call with Backblaze about B2 features and performance.
Firstly, they have recently added a caching layer to speed up serving repeatedly requested files. This reduces the delay as the file is reassembled from Reed-Solomon slices. They also suggested that I do some new tests, as they thought I should be seeing faster speeds, even for first-access.
I've been implementing a Go client library for the Backblaze B2 cloud storage service: go-backblaze. It works extremely well, but is a bit slow to get files back.
Update 12th December: I've spoken to Backblaze, who have been working to improve performance. I have performed some new tests and written them up.
I've implemented a parallel download feature which you can use to download several files at the same time - this doesn't seem to affect the speed of individual downlaods very much, so I assume that the downloads are limited for one of two reasons
Downloading 5 copies of the same file in parallel doesn't seem to affect the download speed, nor do 5 sequential downloads. Whatever you do, each download seems to run at about 200KiB/sec.
