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5b550e94a6
File streaming only releases the file descriptors of a tablet being streamed in the very streaming end. Which means that if the streaming tablet has compaction on largest tier finished after streaming started, there will be always ~2x space amplification for that single tablet. Since there can be up to 4 tablets being migrated away, it can add up to a significant amount, since nodes are pushed to a substantial usage of available space (~90%). We want to optimize this by dropping reference to a sstable after it was fully streamed. This way, we reduce the chances of hitting 2x space amplification for a given tablet. Signed-off-by: Raphael S. Carvalho <raphaelsc@scylladb.com> Closes scylladb/scylladb#28505