Docker在ubuntu主机上的性能比OSX主机更差+ + [英] Docker performance on ubuntu host 2x+ worse than OSX host
问题描述
Ubuntu主机
15.04在i7 3820（四位3.6）和三星850 pro SSD 512gb SATA 6
$ docker info
容器：2
图片：101
存储驱动程序：overlay
备份文件系统：extfs
执行驱动程序：native-0.2
日志驱动程序：json-file
内核版本：3.19.0-28-generic
操作系统：Ubuntu 15.04
CPU：8
总内存：15.61 GiB
名称：camacho
ID：ZOYN：QGDO：UGMJ：TDDM：WEEM：ZEHJ：4OKB：V5WR：RGCL ：NOKG：F5W5：SDEL
警告：无交换限制支持
OSX主机
i7（Quad 2.7）上的10.10.5和Apple SSD 512gb SD512E SATA 6（2+岁）
$ docker info
容器：3
图像：185
存储驱动程序：aufs
根目录：/ mnt / sda1 / var / lib / docker / aufs
备份文件系统：extfs
Dirs：191
Dirperm1支持：true
执行驱动程序：native-0.2
日志驱动程序： json-file
内核版本：4.0.9-boot2docker
操作系统：Boot2Docker 1.8.1（TCL 6.3）; master：7f12e95 - Thu Aug 13 03:24:56 UTC 2015
CPU：8
总内存：3.858 GiB
名称：dinghy
ID：PNNP：PI3E：CRUK：27RI ：IPHW：HROF：NQA2：XKV6：VGCZ：WT7B：BZ7R：USWD
调试模式（服务器）：true
文件描述符：21
Goroutines：54
系统时间：2015 -09-24T19：16：01.715069994Z
事件侦听器：1
初始化SHA1：
初始路径：/ usr / local / bin / docker
Docker根目录：/ mnt / sda1 / var / lib / docker
标签：
provider = virtualbox
/ h3>
- 在OSX上运行2x +速度的dockerized rspec
- sysbench io结果在Ubuntu上非常糟糕
- dockerized iozone结果如预期（ubuntu稍快）
- 硬件检查完成，ubuntu主机在SATA 6电缆和端口上
iozone结果
docker run -it threadx / docker- ubuntu-iozone
$ iozone -R -l 5 -u 5 -r 4k -s 100m -F / home / f1 / home / f2 / home / f3 / ho我/ f4 / home / f5 | tee -a /tmp/iozone_results.txt&
摘要
我正在测试我们的测试过程，因为我们需要稳定性和并发性。我们已经做了大量工作来限制测试时间，而且两倍的增长是一个可怕的倒退。
Sysbench显示ubuntu主机的性能比OSX差4倍，我对此不了解。 dd 和 iozone 测试显示ubuntu主机按预期执行。
问题
为什么我的rspec性能在ubuntu主机上有更快的资源？我应该在哪里调查？是sysbench io测试一个指标还是一个异常？在dockerized ubuntu中，性能不佳的原因是什么？
区别在于PCIe vs SATA 6接口。最新一代的Macbook Pro PCIe更快。
Ok, let's start over after a bunch of investigation. Here is what we know:
Ubuntu host
15.04 on i7 3820 (quad 3.6) and Samsung 850 pro SSD 512gb SATA 6
$ docker info
Containers: 2
Images: 101
Storage Driver: overlay
Backing Filesystem: extfs
Execution Driver: native-0.2
Logging Driver: json-file
Kernel Version: 3.19.0-28-generic
Operating System: Ubuntu 15.04
CPUs: 8
Total Memory: 15.61 GiB
Name: camacho
ID: ZOYN:QGDO:UGMJ:TDDM:WEEM:ZEHJ:4OKB:V5WR:RGCL:NOKG:F5W5:SDEL
WARNING: No swap limit support
OSX host
10.10.5 on i7 (quad 2.7) and Apple SSD 512gb SD512E SATA 6 (2+ years old)
$ docker info
Containers: 3
Images: 185
Storage Driver: aufs
Root Dir: /mnt/sda1/var/lib/docker/aufs
Backing Filesystem: extfs
Dirs: 191
Dirperm1 Supported: true
Execution Driver: native-0.2
Logging Driver: json-file
Kernel Version: 4.0.9-boot2docker
Operating System: Boot2Docker 1.8.1 (TCL 6.3); master : 7f12e95 - Thu Aug 13 03:24:56 UTC 2015
CPUs: 8
Total Memory: 3.858 GiB
Name: dinghy
ID: PNNP:PI3E:CRUK:27RI:IPHW:HROF:NQA2:XKV6:VGCZ:WT7B:BZ7R:USWD
Debug mode (server): true
File Descriptors: 21
Goroutines: 54
System Time: 2015-09-24T19:16:01.715069994Z
EventsListeners: 1
Init SHA1:
Init Path: /usr/local/bin/docker
Docker Root Dir: /mnt/sda1/var/lib/docker
Labels:
provider=virtualbox
Observations
- dockerized rspec running 2x+ faster on OSX
- sysbench io results are terrible on Ubuntu
- dockerized iozone results are as expected (ubuntu slightly faster)
- hardware check complete, ubuntu host is on a SATA 6 cable and port
iozone results
docker run -it threadx/docker-ubuntu-iozone
$ iozone -R -l 5 -u 5 -r 4k -s 100m -F /home/f1 /home/f2 /home/f3 /home/f4 /home/f5 | tee -a /tmp/iozone_results.txt &
Summary
I'm dockerizing our test process because we need stability and concurrency. We've done a bunch of work to limit test times, and a 2x increase in times is a terrible step backwards.
Sysbench shows the ubuntu host performing 4x worse than OSX, and I have no understanding of that. dd and iozone tests show the ubuntu host to be performing as expected.
Question
Why is my rspec performance worse on the ubuntu host which has faster resources? Where should I investigate? Is sysbench io test an indicator or an anomaly? What are sources of bad performance in dockerized ubuntu?
The difference is PCIe vs SATA 6 interfaces. The latest generation of Macbook Pro PCIe is even faster.
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