Can I make a pipe save data to disk instead of blocking until the reader can continue?

Are there any established tools where the pipe spills to disk rather than blocking the upstream process? As an example, in a traditional pipeline A | B, we get the following behavior when B does not read from stdin: - A emits output until stdout fills up - Then A is blocked until B reads from stdin I'd like the following behavior instead: - A emits output until its stdout buffer fills up - Further output from A is written to an on-disk cache file, so A is not blocked - When B ingests data from stdin, new data from the on-disk cache file is read (FIFO) into the buffer Is there any existing tool that accomplishes this? Thank you!