Jan 012014
 

Happy New Year. I am in the habit of writing retrospect of the last year and prospect of this year on the first day of a new year. The most impressive thing in 2013 was the spread of social media networks. As I am not sociable, I had shunned them while MySpace and later Facebook were in fashion, until one day I thought of using them as notification service instead of email newsletters. Once I tried using them, I soon realized their usefulness. I wish I had started earlier.

1 : Participation in social media networks

I started to utilize social media networks such as Twitter, Facebook and Google+ in 2012. In 2013 I searched for other popular social media networks. Then I got the following list of the eight most active social networks that are used both in USA and Japan. This is the ranking of the number of active users (millions) with the Alexa ranking

Social Media Active Users Alexa Rank
Facebook 1190M No. 2
YouTube 1000M No. 3
Google+ 540M No. 1
LinkedIn 259M No. 16
Twitter 232M No. 12
Instagram 150M No. 40
Tumblr 100M No. 32
Pinterest 70M No. 30

YouTube is a special social media networks for movies and Instagram and Pinterest for images. So, I decided to register with LinkeIn and Tumblr newly. I also made Google+ pages. You can use them to follow me. Click the link to see what kind of posts are distributed.

As of January 1, 2014. The number of followers is 137 (Twitter), 107 (Facebook) and 41 (Google+). This is small compared to 4690 subscribers of my email newsletter, but I hope it will grow from now on.

2 : Improvement in Server

The hosting server industry is moving towards solid state drives (SSD). As SSDs have no moving mechanical components unlike traditional electromechanical magnetic disks, they are typically more resistant to physical shock, run silently, have lower access time, and less latency. So, SSD VPS is ideal for database driven websites or read/write intensive applications with higher than normal disk I/O like mine. I chose an SSD Virtual Server Hosting last year and I hope you can enjoy better site experience.

The following are the result of benchmarks tests performed on the new server. The new hosting service seems better than the past one. The first one is the result of UnixBench.

Benchmark Run: Wed Jan 01 2014 19:53:39 - 20:21:57
2 CPUs in system; running 1 parallel copy of tests

Dhrystone 2 using register variables       26606072.1 lps   (10.0 s, 7 samples)
Double-Precision Whetstone                     2669.3 MWIPS (9.9 s, 7 samples)
Execl Throughput                               3016.2 lps   (29.7 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks        811142.3 KBps  (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks          231297.5 KBps  (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks       1082517.3 KBps  (30.0 s, 2 samples)
Pipe Throughput                             1909745.6 lps   (10.0 s, 7 samples)
Pipe-based Context Switching                  24148.4 lps   (10.0 s, 7 samples)
Process Creation                               7251.7 lps   (30.0 s, 2 samples)
Shell Scripts (1 concurrent)                   5165.5 lpm   (60.0 s, 2 samples)
Shell Scripts (8 concurrent)                   1212.2 lpm   (60.0 s, 2 samples)
System Call Overhead                        3281264.5 lps   (10.0 s, 7 samples)

System Benchmarks Index Values               BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0   26606072.1   2279.9
Double-Precision Whetstone                       55.0       2669.3    485.3
Execl Throughput                                 43.0       3016.2    701.4
File Copy 1024 bufsize 2000 maxblocks          3960.0     811142.3   2048.3
File Copy 256 bufsize 500 maxblocks            1655.0     231297.5   1397.6
File Copy 4096 bufsize 8000 maxblocks          5800.0    1082517.3   1866.4
Pipe Throughput                               12440.0    1909745.6   1535.2
Pipe-based Context Switching                   4000.0      24148.4     60.4
Process Creation                                126.0       7251.7    575.5
Shell Scripts (1 concurrent)                     42.4       5165.5   1218.3
Shell Scripts (8 concurrent)                      6.0       1212.2   2020.3
System Call Overhead                          15000.0    3281264.5   2187.5
                                                                   ========
System Benchmarks Index Score                                        1014.7

------------------------------------------------------------------------
Benchmark Run: Wed Jan 01 2014 20:21:57 - 20:50:18
2 CPUs in system; running 2 parallel copies of tests

Dhrystone 2 using register variables       52806919.3 lps   (10.0 s, 7 samples)
Double-Precision Whetstone                     5343.1 MWIPS (9.9 s, 7 samples)
Execl Throughput                               7813.2 lps   (29.9 s, 2 samples)
File Copy 1024 bufsize 2000 maxblocks        936294.3 KBps  (30.0 s, 2 samples)
File Copy 256 bufsize 500 maxblocks          265501.3 KBps  (30.0 s, 2 samples)
File Copy 4096 bufsize 8000 maxblocks       1822609.8 KBps  (30.0 s, 2 samples)
Pipe Throughput                             3753192.0 lps   (10.0 s, 7 samples)
Pipe-based Context Switching                 547856.2 lps   (10.0 s, 7 samples)
Process Creation                              22316.2 lps   (30.0 s, 2 samples)
Shell Scripts (1 concurrent)                   9477.0 lpm   (60.0 s, 2 samples)
Shell Scripts (8 concurrent)                   1273.5 lpm   (60.0 s, 2 samples)
System Call Overhead                        4545233.2 lps   (10.0 s, 7 samples)

System Benchmarks Index Values               BASELINE       RESULT    INDEX
Dhrystone 2 using register variables         116700.0   52806919.3   4525.0
Double-Precision Whetstone                       55.0       5343.1    971.5
Execl Throughput                                 43.0       7813.2   1817.0
File Copy 1024 bufsize 2000 maxblocks          3960.0     936294.3   2364.4
File Copy 256 bufsize 500 maxblocks            1655.0     265501.3   1604.2
File Copy 4096 bufsize 8000 maxblocks          5800.0    1822609.8   3142.4
Pipe Throughput                               12440.0    3753192.0   3017.0
Pipe-based Context Switching                   4000.0     547856.2   1369.6
Process Creation                                126.0      22316.2   1771.1
Shell Scripts (1 concurrent)                     42.4       9477.0   2235.1
Shell Scripts (8 concurrent)                      6.0       1273.5   2122.4
System Call Overhead                          15000.0    4545233.2   3030.2
                                                                   ========
System Benchmarks Index Score                                        2154.7

The next one is the result of ApacheBench.

Server Software:        nginx/1.0.15
Server Hostname:        www.systemicsblog.com
Server Port:            80

Document Path:          /ja/2013/heat_engine/
Document Length:        135325 bytes

Concurrency Level:      5
Time taken for tests:   0.046 seconds
Complete requests:      100
Failed requests:        0
Write errors:           0
Total transferred:      13568489 bytes
HTML transferred:       13532500 bytes
Requests per second:    2174.34 [#/sec] (mean)
Time per request:       2.300 [ms] (mean)
Time per request:       0.460 [ms] (mean, across all concurrent requests)
Transfer rate:          288110.23 [Kbytes/sec] received

Connection Times (ms)
              min  mean[+/-sd] median   max
Connect:        0    0   0.1      0       1
Processing:     1    2   1.3      2       8
Waiting:        0    2   1.4      2       8
Total:          1    2   1.3      2       8

Percentage of the requests served within a certain time (ms)
  50%      2
  66%      2
  75%      2
  80%      2
  90%      2
  95%      8
  98%      8
  99%      8
 100%      8 (longest request)

3: Prospect of 2014

The number of articles this year was only 6. I wonder why I happen to publish just 6 articles every year. While I want to avoid posting a short article of low quality, I would like to post an article per month. Otherwise this site could not be called “blog”.

The main theme of articles in 2013 was the philosophical and historical study in mathematics, science and technology. This is also the main theme of articles in 2014, but I will focus on more fundamental and central theory of systems.

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