extsort_rsw

• Allocates (RAM-2)/2 as read buffers (RB)
• Each thread allocates write buffer (WB) of size RB/num_threads
• Sort of supports more concurrency.

extsort_rsw_2

• Allocates 20 Gib as RB.

• Allocates 1GB WB per thread.

• Single thread loops RB/WB times to finsih writing for that RB read.

• Can't have more threads as more WB can't be created.

• A metric to identify the interference of read and write.

• A metric to measure memory and cpu usage. Wasted cores and unused free mem.

extsort_rsw_3

• Why seperate key and value. Send sort objects directly to sort() method.