VPS推荐网ChangeIP提供的VPS主机主要特色就是大部分方案不限流量，部分节点提供20Gbps DDOS防护，目前洛杉矶和丹佛对国内线路进行了优化。近期ChangeIP提供了一枚5折优惠码，使用之后还是具有一定的性价比。在这里分享一下洛杉矶节点VPS主机的一些基本信息吧。
优惠码：FLAT50OFF 终身优惠，活动有效期不详；
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系统信息、带宽、I/O测试
CPU model : QEMU Virtual CPU version (cpu64-rhel6)
Number of cores : 1
CPU frequency : 2599.998 MHz
Total size of Disk : 30.0 GB (0.8 GB Used)
Total amount of Mem : 996 MB (172 MB Used)
Total amount of Swap : 511 MB (0 MB Used)
System uptime : 0 days, 0 hour 10 min
Load average : 0.67, 0.52, 0.20
OS : CentOS 6.5
Arch : x86_64 (64 Bit)
Kernel : 2.6.32-431.1.2.0.1.el6.x86_64
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I/O speed(1st run) : 47.5 MB/s
I/O speed(2nd run) : 87.9 MB/s
I/O speed(3rd run) : 62.5 MB/s
Average I/O speed : 66.0 MB/s
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Node Name IPv4 address Download Speed
CacheFly 205.234.175.175 7.35MB/s
Linode, Tokyo, JP 106.187.96.148 2.83MB/s
Linode, Singapore, SG 139.162.23.4 2.60MB/s
Linode, London, UK 176.58.107.39 2.08MB/s
Linode, Frankfurt, DE 139.162.130.8 3.27MB/s
Linode, Fremont, CA 50.116.14.9 6.47MB/s
Softlayer, Dallas, TX 173.192.68.18 4.07MB/s
Softlayer, Seattle, WA 67.228.112.250 5.31MB/s
Softlayer, Frankfurt, DE 159.122.69.4 2.44MB/s
Softlayer, Singapore, SG 119.81.28.170 2.67MB/s
Softlayer, HongKong, CN 119.81.130.170 1.78MB/s
硬盘 I/O 性能测试
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, 164.636 s, 1.6 MB/s
UnixBench跑分
Benchmark Run: Tue Aug 15 2017 19:26:28 - 20:12:50
1 CPU in system; running 1 parallel copy of tests
Dhrystone 2 using register variables 23779977.1 lps (10.0 s, 7 samples)
Double-Precision Whetstone 2899.2 MWIPS (10.1 s, 7 samples)
Execl Throughput 2990.7 lps (29.6 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks 566098.0 KBps (30.1 s, 2 samples)
File Copy 256 bufsize 500 maxblocks 170200.3 KBps (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks 1408704.9 KBps (30.0 s, 2 samples)
Pipe Throughput 1186396.7 lps (10.0 s, 7 samples)
Pipe-based Context Switching 241598.4 lps (10.0 s, 7 samples)
Process Creation 10690.2 lps (30.0 s, 2 samples)
Shell Scripts (1 concurrent) 3753.9 lpm (60.0 s, 2 samples)
Shell Scripts (8 concurrent) 491.6 lpm (60.1 s, 2 samples)
System Call Overhead 1807537.2 lps (10.0 s, 7 samples)
System Benchmarks Index Values BASELINE RESULT INDEX
Dhrystone 2 using register variables 116700.0 23779977.1 2037.7
Double-Precision Whetstone 55.0 2899.2 527.1
Execl Throughput 43.0 2990.7 695.5
File Copy 1024 bufsize 2000 maxblocks 3960.0 566098.0 1429.5
File Copy 256 bufsize 500 maxblocks 1655.0 170200.3 1028.4
File Copy 4096 bufsize 8000 maxblocks 5800.0 1408704.9 2428.8
Pipe Throughput 12440.0 1186396.7 953.7
Pipe-based Context Switching 4000.0 241598.4 604.0
Process Creation 126.0 10690.2 848.4
Shell Scripts (1 concurrent) 42.4 3753.9 885.3
Shell Scripts (8 concurrent) 6.0 491.6 819.4
System Call Overhead 15000.0 1807537.2 1205.0
========
System Benchmarks Index Score 1011.0
总结
整体上性能一般般，特别是IO真心的不高，不过一分钱、一分货；这样的性能对于一般的网站建设还是够用了，不过流量或者数据过多估计得要搬家哦，嘿嘿。
说明：与Rectified为同一家公司，所以还是存在一定的历史。