Summary:
I have implemented a FreeList version that supports fragmented blob chunks. Each block gets allocated and freed in FIFO order. Since the idea for the blocks to be big, we will not take a big hit of non-sequential IO. Free list is also faster, taking only O(k) size in both free and allocate instead of O(N) as before.
See more info on the task: https://our.intern.facebook.com/intern/tasks/?t=2990558
Also, I'm taking Slice instead of const char * and size in Put function.
Test Plan: unittests
Reviewers: haobo, kailiu, dhruba, emayanke
Reviewed By: dhruba
CC: leveldb
Differential Revision: https://reviews.facebook.net/D13569
30f1b97a06