试用Facebook的WDT

1. 概述

前几天facebook开源了WDT项目，项目的地址为：可以看为一个嵌入式的库或者命令行工具，其目的是在尽量减少资源（CPU/内存等）消耗的情况下，利用多个TCP路径提高两个系统之间传送文件的效率。本文主要是体验一下该项目，在Ubuntu14.04上安装并进行测试。这里有个条件可能需要在gcc的版本，在Centos6.3/6.5上的gcc版本为4.4，在编译的过程中可能会出现错误，这里使用的gcc-4.9.0，但是没有在gcc-4.8.0上进行编译，不太确定是否可用。

2. 安装

1.       第一步先是在ubuntu14.04上安装gcc /g++版本。

sudo add-apt-repository ppa:ubuntu-toolchain-r/test

sudo apt-get update

sudo apt-get install g++-4.9             

通过命令g++ -v可以看到安装的g++版本号

g++ -v

gcc version 4.9.2 (Ubuntu 4.9.2-0ubuntu1~14.04)

2.        下面的命令保证可以在编译Cmake时，找到

sudo apt-get install build-essential

在ubuntu上必须先安装build-essential否则，在cmake下执行bootstrap的话，会出现下面的错误。

./bootstrap --prefix=/usr --parallel=16

---------------------------------------------

CMake 3.2.3, Copyright 2000-2015 Kitware, Inc.

---------------------------------------------

Error when bootstrapping CMake:

Cannot find appropriate C compiler on this system.

Please specify one using environment variable CC.

See cmake_bootstrap.log for compilers attempted.

 

---------------------------------------------

Log of errors: /home/ubuntu/cmake-3.2.3/Bootstrap.cmk/cmake_bootstrap.log

3.       wget tar xvfz cmake-3.2.3.tar.gz

cd cmake-3.2.3

./bootstrap --prefix=/usr --parallel=16 && make -j && sudo make install

4.       sudo apt-get install libgoogle-glog-dev libboost-system-dev \

libdouble-conversion-dev

5.       sudo apt-get install git subversion.

6.       git clone cd double-conversion; cmake . ; make -j && sudo make install

7.       git clone mkdir gflags/build

cd gflags/build

cmake -D GFLAGS_NAMESPACE=google -D BUILD_SHARED_LIBS=on ..

make -j && sudo make install

8.       git clone 9.       svn checkout glog

./configure --with-gflags=/usr/local

10.   git clone cmake /home/ubuntu/wdt/ -DBUILD_TESTING=on

make -j

make test

sudo make install

3.  验证测试

在接收端执行下面的命令：sudo wdt -directory /home/ubuntu/test/

ubuntu@10-8-7-191:~/test$ sudo wdt -directory /home/ubuntu/test/

I0802 12:26:45.662655 31270 wdtCmdLine.cpp:130] Running WDT 1.15.1507290 p 15

I0802 12:26:45.662818 31270 WdtBase.cpp:304] Generated a transfer id 1616988683

I0802 12:26:45.662849 31270 WdtBase.cpp:272] using wdt protocol version 15

I0802 12:26:45.663175 31270 Receiver.cpp:151] Registered 8 sockets

I0802 12:26:45.663211 31270 Receiver.cpp:163] Transfer id 1616988683

I0802 12:26:45.663229 31270 wdtCmdLine.cpp:161] Starting receiver with connection url

wdt://10-8-7-191?ports=22356,22357,22358,22359,22360,22361,22362,22363&protocol=15&id=1616988683

I0802 12:26:45.663298 31270 wdtCmdLine.cpp:82] Setting up abort 0 seconds.

I0802 12:26:45.663318 31270 Receiver.cpp:404] Starting (receiving) server on ports [ 22356 22357 22358 22359 22360 22361 22362 22363 ] Target dir : /home/ubuntu/test/

I0802 12:26:45.663354 31270 FileCreator.cpp:215] dir already exists /

I0802 12:26:45.663379 31270 FileCreator.cpp:215] dir already exists /home/

I0802 12:26:45.663391 31270 FileCreator.cpp:215] dir already exists /home/ubuntu/

I0802 12:26:45.663419 31270 FileCreator.cpp:215] dir already exists /home/ubuntu/test/

I0802 12:26:45.663478 31270 WdtBase.cpp:292] Throttling not enabled

I0802 12:26:45.664497 31279 Receiver.cpp:361] Progress reporter updating every 20 ms

I0802 12:26:55.560704 31272 Receiver.cpp:504] New transfer started 1

[================================================>] 99% 162.8 5.6 Mbytes/s  I0802 12:26:56.284689 31274 Receiver.cpp:463] Received done for all threads. Transfer session 1 finished

I0802 12:26:56.285032 31274 Receiver.cpp:1268] Thread[3, port: 22359]  got ack for DONE. Transfer finished

I0802 12:26:56.285162 31278 Receiver.cpp:1268] Thread[7, port: 22363]  got ack for DONE. Transfer finished

I0802 12:26:56.285157 31275 Receiver.cpp:1268] Thread[4, port: 22360]  got ack for DONE. Transfer finished

I0802 12:26:56.285118 31277 Receiver.cpp:1268] Thread[6, port: 22362]  got ack for DONE. Transfer finished

I0802 12:26:56.285444 31272 Receiver.cpp:1268] Thread[1, port: 22357]  got ack for DONE. Transfer finished

I0802 12:26:56.285712 31276 Receiver.cpp:1268] Thread[5, port: 22361]  got ack for DONE. Transfer finished

I0802 12:26:56.285836 31271 Receiver.cpp:1268] Thread[0, port: 22356]  got ack for DONE. Transfer finished

I0802 12:26:56.285913 31273 Receiver.cpp:1268] Thread[2, port: 22358]  got ack for DONE. Transfer finished

W0802 12:26:56.286119 31273 Receiver.cpp:1386] Last thread finished. Duration of the transfer 0.725431

[=================================================] 100% 159.5 Mbytes/s         

W0802 12:26:56.286365 31270 Receiver.cpp:268] WDT receiver's transfer has been finished

I0802 12:26:56.286382 31270 Receiver.cpp:269] Transfer status = OK. Number of blocks transferred = 632. Data Mbytes = 115.742. Header kBytes = 13.8848 (0.0117151% overhead). Total bytes = 121378462. Wasted bytes due to failure = 0 (0% overhead).

在发送端执行下面的命令wdt -directory /usr/bin -destination 10.8.7.191 -transfer_id 1616988683，在传输完成后，最下面是统计信息。

wdt -directory /usr/bin -destination 10.8.7.191 -transfer_id 1616988683

I0802 12:26:55.557087  5427 wdtCmdLine.cpp:130] Running WDT 1.15.1507290 p 15

I0802 12:26:55.557574  5427 WdtBase.cpp:272] using wdt protocol version 15

I0802 12:26:55.557641  5427 wdtCmdLine.cpp:200] Starting sender with details wdt://10.8.7.191?ports=22356,22357,22358,22359,22360,22361,22362,22363&protocol=15&dir=/usr/bin&id=1616988683

I0802 12:26:55.557668  5427 wdtCmdLine.cpp:82] Setting up abort 0 seconds.

I0802 12:26:55.557696  5427 Sender.cpp:357] Client (sending) to 10.8.7.191, Using ports [ 22356 22357 22358 22359 22360 22361 22362 22363 ]

I0802 12:26:55.557796  5427 WdtBase.cpp:292] Throttling not enabled

I0802 12:26:55.557886  5428 DirectorySourceQueue.cpp:139] Exploring root dir /usr/bin/ include_pattern :  exclude_pattern :  prune_dir_pattern :

I0802 12:26:55.560621  5429 Sender.cpp:489] Connection took 1 attempt(s) and 0.00210126 seconds. port 22356

I0802 12:26:55.560621  5430 Sender.cpp:489] Connection took 1 attempt(s) and 0.00209491 seconds. port 22357

I0802 12:26:55.561148  5431 Sender.cpp:489] Connection took 1 attempt(s) and 0.000271586 seconds. port 22358

I0802 12:26:55.561575  5432 Sender.cpp:489] Connection took 1 attempt(s) and 0.000139581 seconds. port 22359

I0802 12:26:55.561785  5433 Sender.cpp:489] Connection took 1 attempt(s) and 0.000302113 seconds. port 22360

I0802 12:26:55.570382  5437 Sender.cpp:1277] Progress reporter tracking every 20 ms

I0802 12:26:55.570552  5436 Sender.cpp:489] Connection took 1 attempt(s) and 0.00024346 seconds. port 22363

I0802 12:26:55.571169  5435 Sender.cpp:489] Connection took 1 attempt(s) and 0.00111626 seconds. port 22362

I0802 12:26:55.573040  5428 DirectorySourceQueue.cpp:294] Number of files explored: 632, errors: false

I0802 12:26:55.574348  5434 Sender.cpp:489] Connection took 1 attempt(s) and 0.00426591 seconds. port 22361

[================================================>] 99% 160.6 171.7 Mbytes/s  I0802 12:26:56.285174  5432 Sender.cpp:1106] Port 22359 done. Transfer status = OK. Number of blocks transferred = 51. Data Mbytes = 15.3743. Header kBytes = 1.82031 (0.0115624% overhead). Total bytes = 16123023. Wasted bytes due to failure = 0 (0% overhead). Total throughput = 21.2451 Mbytes/sec

I0802 12:26:56.285308  5433 Sender.cpp:1106] Port 22360 done. Transfer status = OK. Number of blocks transferred = 37. Data Mbytes = 9.76006. Header kBytes = 1.39941 (0.0140021% overhead). Total bytes = 10235597. Wasted bytes due to failure = 0 (0% overhead). Total throughput = 13.4855 Mbytes/sec

I0802 12:26:56.285414  5436 Sender.cpp:1106] Port 22363 done. Transfer status = OK. Number of blocks transferred = 131. Data Mbytes = 16.1024. Header kBytes = 4.19922 (0.025467% overhead). Total bytes = 16888874. Wasted bytes due to failure = 0 (0% overhead). Total throughput = 22.5229 Mbytes/sec

I0802 12:26:56.285537  5435 Sender.cpp:1106] Port 22362 done. Transfer status = OK. Number of blocks transferred = 52. Data Mbytes = 12.5765. Header kBytes = 1.80859 (0.0140436% overhead). Total bytes = 13189316. Wasted bytes due to failure = 0 (0% overhead). Total throughput = 17.5835 Mbytes/sec

I0802 12:26:56.285713  5429 Sender.cpp:1106] Port 22356 done. Transfer status = OK. Number of blocks transferred = 61. Data Mbytes = 16.361. Header kBytes = 2.10254 (0.0125498% overhead). Total bytes = 17157861. Wasted bytes due to failure = 0 (0% overhead). Total throughput = 22.5007 Mbytes/sec

I0802 12:26:56.285908  5434 Sender.cpp:1106] Port 22361 done. Transfer status = OK. Number of blocks transferred = 78. Data Mbytes = 14.3567. Header kBytes = 2.74512 (0.0186727% overhead). Total bytes = 15056863. Wasted bytes due to failure = 0 (0% overhead). Total throughput = 20.0654 Mbytes/sec

I0802 12:26:56.285987  5430 Sender.cpp:1106] Port 22357 done. Transfer status = OK. Number of blocks transferred = 78. Data Mbytes = 17.14. Header kBytes = 2.52637 (0.0143941% overhead). Total bytes = 17975215. Wasted bytes due to failure = 0 (0% overhead). Total throughput = 23.5733 Mbytes/sec

I0802 12:26:56.286065  5431 Sender.cpp:1106] Port 22358 done. Transfer status = OK. Number of blocks transferred = 144. Data Mbytes = 14.071. Header kBytes = 4.63965 (0.0322004% overhead). Total bytes = 14759246. Wasted bytes due to failure = 0 (0% overhead). Total throughput = 19.4189 Mbytes/sec

I0802 12:26:56.286252  5431 Sender.cpp:1075] Last thread finished 0.728525

[=================================================] 100% 158.9 Mbytes/s         

I0802 12:26:56.286648  5427 Sender.cpp:330] Total sender time = 0.728582 seconds (0.0155556 dirTime). Transfer summary : Transfer status = OK. Number of files transferred = 632. Data Mbytes = 115.742. Header kBytes = 21.2412 (0.0179221% overhead). Total bytes = 121385995. Wasted bytes due to failure = 0 (0% overhead).

Total sender throughput = 158.885 Mbytes/sec (162.351 Mbytes/sec pure transf rate)

3.1      使用wcp.sh

Wdt提供了一个类似于scp的脚本，该脚本使用wdt进行模拟scp的功能，下面是使用wcp.sh进行数据包的传输的过程。

./wcp.sh -n /data/bigfile  ubuntu@10.8.7.191:/data

Copying bigfile (/data/bigfile) to 10.8.7.191 (using ubuntu@10.8.7.191 in /data)

Starting destination side server

Starting at Sun Aug  2 13:56:28 CST 2015 (1438494988043)

1438494988.047310974

[                                                 ] 0% 0.0 0.0 Mbytes/s  wdt://10-8-7-191?ports=22356,22357,22358,22359,22360,22361,22362,22363&protocol=15&id=7825

[=================================================] 100% 86.8 Mbytes/s

Complete!

 

real  1m55.222s

user 0m2.858s

sys   0m10.572s

Sun Aug  2 13:58:23 CST 2015

Dst checksum

Succesfull transfer

All done client side! cleanup...

Overall transfer @ 86 Mbytes/sec (115228 ms for 10485760000 uncompressed)

Source checksum:

26f56024ac39cdc54b228820107f040d  /data/bigfile

         使用scp的进行测试的话。

scp /data/bigfile ubuntu@10.8.7.191:/data

bigfile                                                                                             100%   10GB  87.7MB/s   01:54

4．总结

 通过上面的测试，在copy /usr/bin目录下的文件时，速度确认很快，但是在使用scp和wcp传输一个较大的文件时，并没有体现出其很大的优势，也许是我测试的方法有问题，后续有机会再研究测试，也希望可以得到实践者的指导。
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