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Digital Ocean VPS评测
官网： Digital Ocean
界面清新，图标按钮很大，蓝绿色彩搭配，很舒服的官网设计。
5$一月起步，SSD硬盘，但是实测速度一般。LA的网络到中国还不错。
采用按时计费的方式，注意，并不是关闭VPS就不收费了，而是释放母机资源后不收费。以下是客服说明：
Hello,
You will still be charged for the virtual server even if its in an off state, because the hypervisor continues to reserve your share of CPU, RAM and disk, as well as the IP for your virtual server.
If you would like to discontinue using a virtual server but save it for later use, we recommend taking a snapshot of the server and then destroying it.
When you are ready to use it again, you can create a new virtual server from that snapshot, and the only difference you would notice is an IP change.
Please let us know if you have any additional questions.
Thank you. Etel
现在购买添加信用卡使用
promo code: SSDBEAR10 赠送10$ 记得要首先添加信用卡，PayPal支付后再添加信用卡就没有输入promocode的输入框了。具体评测有空放出。敬请期待。
欢迎使用我的Referal：Referal
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使用 kindle dxg 作为第二显示器
背景
Amazon都放弃dxg了，新产品没有跟上来，软件版本也是很久没有动静。毕竟是商业公司，dxg注定是小众的产品，太笨重，反应太慢是避不开的问题。但是用来看A4的PDF还是不错的。将其作为第二显示器也算是一物多用，略减遗憾。
以下测试环境为 windows 7 64bit，需要的软件主要是：TightVNC，Putty 。
步骤
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越狱，usbnetwork等是准备工作，可以参考我的前一篇文章：kindle dxg添加中文支持及更改字体。
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PC端：安装TightVNC
配置方面主要注意的是：Windows的防火墙设置，关闭或者设置例外。取消TightVNC的认证密码；在extra标签下设置为dxg准备的分辨率：1200x824，此处设置的端口号为最终连接的端口号。 -
Kindle端：安装kindlevncviewer 将下载的附件压缩包内的kindlevncviewer子文件夹解压到kindle的根目录，也就是
/mnt/us目录。这里需要注意的是要将此目录下的两个共享库文件复制到系统库文件下/lib，分别是libjpeg.so.8和libvncclient.so.0。按道理来说应该会先搜索当前目录，但是我在运行的时候会提示找不到共享库文件，所以复制到系统库文件下。这样操作之后是OK的。 -
在kindle上执行如下命令：
./kindlevncviewer -config ./config.lua 192.168.2.1:5901不出意外的话就OK了。但是出意外的情况会有很多，你可以根据mobileread论坛上的讨论获得线索，或者直接看github上的代码。相关资料后附。
5.NOTE: 如果出现这样的错误：
com.lab126.powerd failed to set value for property prevent ScreenSaver一般来说是你的VNC Server出问题了，请检查防火墙，端口，认证等设置，主要是TightVNC Server的配置。
另外，参考
[4]是另外一种方式，通过浏览器渲染，有兴趣的也可以看一看，个人觉得有点蛋疼。其他问题欢迎留言讨论。:)
附张折腾成功的照片
参考
[1] mobileread thread
[2] Github Source Code
[3] http://blog.csdn.net/sjtuyunlei/article/details/7671608
[4] http://www.mobileread.com/forums/showthread.php?t=148581
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SmartVPS香港节点入门套餐VPS测试
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测试VPS信息
可选OS : CentOS, debian, ubuntu
内存 : 512M（保证） ~ 1G（最大）
硬盘 : 20G
流量限制 : 无
IP地址 : IPv4 x 1 + IPv6 x 1
升级:此套餐暂无选项
root权限 : 有
SSH console : 有
管理界面 : 有
速度
本地环境：北京教育网
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IPV4 ping 78ms
ping resultC:\Users>ping 36.54.x.x Pinging 36.54.x.x with 32 bytes of data: Reply from 36.54.x.x: bytes=32 time=76ms TTL=47 Reply from 36.54.x.x: bytes=32 time=111ms TTL=47 Reply from 36.54.x.x: bytes=32 time=56ms TTL=47 Reply from 36.54.x.x: bytes=32 time=69ms TTL=47 Ping statistics for 36.54.x.x: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 56ms, Maximum = 111ms, Average = 78ms -
IPV6 ping 158ms
ping resultC:\Users>ping 2405:3700:400:203:2:1:0:3 Pinging 2405:3700:400:203:2:1:0:3 with 32 bytes of data: Reply from 2405:3700:400:203:2:1:0:3: time=305ms Reply from 2405:3700:400:203:2:1:0:3: time=110ms Reply from 2405:3700:400:203:2:1:0:3: time=113ms Reply from 2405:3700:400:203:2:1:0:3: time=107ms Ping statistics for 2405:3700:400:203:2:1:0:3: Packets: Sent = 4, Received = 4, Lost = 0 (0% loss), Approximate round trip times in milli-seconds: Minimum = 107ms, Maximum = 305ms, Average = 158ms - 全局ping测试
如下图
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下载速度
美国
VPS下载外部文件% wget http://cachefly.cachefly.net/100mb.test --2013-03-23 11:06:44-- http://cachefly.cachefly.net/100mb.test Resolving cachefly.cachefly.net... 204.93.150.151 Connecting to cachefly.cachefly.net|204.93.150.151|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 104857600 (100M) [application/octet-stream] Saving to: `100mb.test' 24% [========> ] 25,200,695 991K/s eta 80s 本地下载VPS上文件 chrome下载 500+kb/s 阿里云 下载VPS文件 HTTP request sent, awaiting response... 200 OK Length: 104857600 (100M) [text/plain] Saving to: `100M.img' 4% [===> ] 4,994,512 324K/s eta 6m 11s
硬盘读写速度
测试硬盘 51.4M/s
% dd if=/dev/zero of=test bs=64k count=4k oflag=dsync 4096+0 records in 4096+0 records out 268435456 bytes (268 MB) copied, 5.22514 s, 51.4 MB/s
CPU、内存基本信息
CPU
% cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 45 model name : Intel(R) Xeon(R) CPU E5-2430L 0 @ 2.00GHz stepping : 7 cpu MHz : 798.852 cache size : 15360 KB physical id : 0 siblings : 1 core id : 0 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu de tsc msr pae cx8 apic sep cmov pat clflush acpi mmx fxsr sse sse2 ss ht syscall nx lm constant_tsc ida arat pni ssse3 cx16 sse4_1 sse4_2 popcnt lahf_lm bogomips : 5031.29 clflush size : 64 cache_alignment : 64 address sizes : 46 bits physical, 48 bits virtual power management:内存
% free -m total used free shared buffers cached Mem: 1024 312 711 0 0 0 -/+ buffers/cache: 312 711 Swap: 0 0 0
unixbench测试
result
BYTE UNIX Benchmarks (Version 5.1.2) System: hkg-vps-srv008: GNU/Linux OS: GNU/Linux -- 2.6.18-194.3.1.el5.028stab069.6xen -- #1 SMP Wed May 26 18:35:38 MSD 2010 Machine: i686 (unknown) Language: en_US.utf8 (charmap="ANSI_X3.4-1968", collate="ANSI_X3.4-1968") CPU 0: Intel(R) Xeon(R) CPU E5-2430L 0 @ 2.00GHz (5031.3 bogomips) Hyper-Threading, x86-64, MMX, Physical Address Ext, SYSENTER/SYSEXIT, SYSCALL/SYSRET 19:13:07 up 4 days, 5:56, 1 user, load average: 0.54, 0.17, 0.05; runlevel 2
Benchmark Run: Tue Mar 26 2013 19:13:07 - 19:44:19 1 CPU in system; running 1 parallel copy of tests Dhrystone 2 using register variables 3591458.9 lps (10.0 s, 7 samples) Double-Precision Whetstone 1216.1 MWIPS (10.9 s, 7 samples) Execl Throughput 317.0 lps (29.9 s, 2 samples) File Copy 1024 bufsize 2000 maxblocks 50510.6 KBps (30.0 s, 2 samples) File Copy 256 bufsize 500 maxblocks 13009.0 KBps (30.0 s, 2 samples) File Copy 4096 bufsize 8000 maxblocks 164252.2 KBps (30.0 s, 2 samples) Pipe Throughput 82899.4 lps (10.0 s, 7 samples) Pipe-based Context Switching 21736.0 lps (10.0 s, 7 samples) Process Creation 803.2 lps (30.0 s, 2 samples) Shell Scripts (1 concurrent) 657.8 lpm (60.1 s, 2 samples) Shell Scripts (8 concurrent) 87.0 lpm (60.4 s, 2 samples) System Call Overhead 69815.3 lps (10.0 s, 7 samples) System Benchmarks Index Values BASELINE RESULT INDEX Dhrystone 2 using register variables 116700.0 3591458.9 307.8 Double-Precision Whetstone 55.0 1216.1 221.1 Execl Throughput 43.0 317.0 73.7 File Copy 1024 bufsize 2000 maxblocks 3960.0 50510.6 127.6 File Copy 256 bufsize 500 maxblocks 1655.0 13009.0 78.6 File Copy 4096 bufsize 8000 maxblocks 5800.0 164252.2 283.2 Pipe Throughput 12440.0 82899.4 66.6 Pipe-based Context Switching 4000.0 21736.0 54.3 Process Creation 126.0 803.2 63.7 Shell Scripts (1 concurrent) 42.4 657.8 155.1 Shell Scripts (8 concurrent) 6.0 87.0 145.0 System Call Overhead 15000.0 69815.3 46.5 ======== System Benchmarks Index Score 110.8
总结
带宽一般，硬盘读写OK，速度可以接受，ssh操作基本流畅，值得购买。另外说个插曲，周末的时候貌似服务器被人折腾了一下，导致一段时间无法登陆。
后记
初次评测，基本只是列出参数，并未斗胆评价什么，欢迎各位拍砖或讨论或点评。