Add multi-threaded writing to GDS writes#9372

Merged

rapids-bot[bot] merged 8 commits intorapidsai:branch-21.12from devavret:gds-write-improvements

Oct 8, 2021

+230-92

Commits on Oct 1, 2021

Same strategy for multithreading as reader
devavret
committed

Commits on Oct 5, 2021

Commits on Oct 6, 2021

Review changes
devavret
committed

Commits on Oct 7, 2021

Commits on Oct 8, 2021

explicit capture of gds functions and file handle
devavret
committed