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1. get information from information_collector
2. build tree
3. call server to do move

4 options:

1. template
2. class implements operator() and inherit a base class
3. void(*fn)()
4. functor

What should the feature do:
1. add mvcc for kv or fs
2. support unblocking read interface with timestamp
3. write multiple version data for write interface

1. looks for whether the lock is in my thread(cached by myself)
2. if true: return true
3. else: send acquire with a new thread and return false

in move:
while true
if try lock one fail: than release all, sleep 1s, continue
else if all locked true : break

1. 如果最后一个字节不是\n，那么加上\n
2. 打印出 [timestamp]: (文件名: 行号) 打印的东西。
3. 可以支持printf， %x，%d这种东西
4. 支持打印等级
5. 这个宏的名字叫CTG_WARN

for example: CTG_WARN(WARN, "error is %d", 15)
=>
[19:20:35]: (qc.cc: 30) error is 15\n

• add regist new kv
• add adjust
• add move

This issue is not an emergency

1. functions return status
2. ret code need check
3. unnecessary code need be removed
4. memory leak should be removed

move(vector, src, dst)

1. fuse client , weifeng
   • file system hook, weifeng
   • library architecture, weifeng
2. yfs client
   • lock client，tl
     • cache ，tl
   • extent client , weifeng
     • cache , weifeng
   • master client，tl
     • cache, tl
   • global timestamp client, qc
3. master
   • master server, tl
   • lock server，tl
     • cache，tl
   • prefix tree，tl
     • multi branch tree, tl
     • auto adjust cursor, tl
     • cost evaluation, tl
   • global timestamp server, qc
   • info collector , weifeng
4. server
   • extent server , weifeng
   • move, weifeng
5. storage
   • wal, qc
   • mvcc, weifeng
   • lsm
     • memtable, qc
     • sstable, qc
6. utility
   • RPC, weifeng
     • RPC frame architecture, weifeng
       • RPC packet, weifeng
       • RPC manager, weifeng
       • marsh override, weifeng
       • error handler, weifeng
     • at most once & at least once semantics, weifeng
   • thread pool, tl
   • log library, weifeng
   • waiter library, qc
7. test
   • fault injection, all
   • modulity unittest, all
8. benchmark, all

复现方法，跑两次test-dir