[Paper note] Monitoring and analyzing big traffic data of a large-scale cellular network with Hadoop

Monitoring and Analyzing Big Traffic Data of a Large-Scale Cellular Network with Hadoop from Alice Chan

http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6863129

Network traffic monitoring and analysis is of theoretical and practical significance for optimizing network resource and improving user experience. However, existing solutions, which usually rely on a high-performance server with large storage capacity, are not scalable for detailed analysis of a large volume of traffic data. In this article, we present a traffic monitoring and analysis system for large-scale networks based on Hadoop, an open-source distributed computing platform for big data processing on commodity hardware. This system has been deployed in the core network of a large cellular network and extensively evaluated. The results demonstrate that the system can efficiently processes 4.2 Tbytes of traffic data from 123 Gb/s links with high performance and low cost every day.

網路流量監控和分析

現在的solution主要都依賴於有著大儲存容量的high-performance server，都沒有可擴展為大量的業務數據的詳細分析。這篇文章提出一個流量監控分析系統基於hadoop，一個開源的分散式計算平台for大數據處理的大型網路。

該系統已經被部署在大型蜂窩網絡的核心網絡和廣泛評價。的結果表明，該系統可以有效地處理4.2 TB的業務數據，從具有高的性能價格比每天123 Gb / s。

明天過後

今天出門的路上，看到拜票車

首先吸引我目光的是一台舊機車

上面有著跟我媽媽差不多年紀的婦女

大聲喊著拜託支持OOO

陸續穿插幾台汽機車

接著是一台十分不起眼的小卡車，載著候選人

我不知道他是誰，屬於哪個黨

不過他看起來很普通，很和善

他周圍的人也是如此

接著是一台亮眼的BENZ

下一台是二十幾年的舊TOYOTA

這樣的對比十分有趣

前後拜票隊伍總共不到十台車

想到了那位大聲求票的婦女

為了支持的候選人，願意付出這樣的行動

我覺得很感動

下午四點多到了台北車站

無論是高鐵或是台鐵都是大爆滿

我們奔波，因為我知道你需要我的一票

無論明天的結果如何

希望各位候選人好好珍惜支持自己的民眾

[胖胖主廚] 整個番茄飯

1. 鍋中放入 

1杯米、3/4杯水、1顆蕃茄、絞肉（依個人喜好）

1小匙橄欖油、1小匙鹽巴、1小匙胡椒粉

2. 蒸熟之後攪拌均勻再悶10分鐘

3. 開箱！噢不對，是開鍋。然後裝盤及完成

搭配古亭市場週三限定手工貢丸煮的味噌湯，帶來今日午後的小確幸～

吃完收工，然後繼續上IEEE找paper~

Orz

[APP開發] 向UI設計師要圖時，要怎麼開規格呢？

開發iOS APP
向UI設計師要圖時，要怎麼開規格呢？



iOS Human Interface Guidelines

https://developer.apple.com/library/ios/documentation/userexperience/conceptual/mobilehig/IconMatrix.html#//apple_ref/doc/uid/TP40006556-CH27-SW1



@3x 代表倍數

Table 39-1Size (in pixels) of custom icons and images

Asset	iPhone 6 Plus (@3x)	iPhone 6 and iPhone 5 (@2x)	iPhone 4s (@2x)	iPad and iPad mini (@2x)	iPad 2 and iPad mini (@1x)
App icon (required for all apps)	180 x 180	120 x 120	120 x 120	152 x 152	76 x 76
App icon for the App Store (required for all apps)	1024 x 1024	1024 x 1024	1024 x 1024	1024 x 1024	1024 x 1024
Launch file or image (required for all apps)	Use a launch file (seeLaunch Images)	For iPhone 6, use a launch file (see Launch Images) For iPhone 5, 640 x 1136	640 x 960	1536 x 2048 (portrait) 2048 x 1536 (landscape)	768 x 1024 (portrait) 1024 x 768 (landscape)
Spotlight search results icon (recommended)	120 x 120	80 x 80	80 x 80	80 x 80	40 x 40
Settings icon (recommended)	87 x 87	58 x 58	58 x 58	58 x 58	29 x 29
Toolbar and navigation bar icon (optional)	About 66 x 66	About 44 x 44	About 44 x 44	About 44 x 44	About 22 x 22
Tab bar icon (optional)	About 75 x 75 (maximum: 144 x 96)	About 50 x 50 (maximum: 96 x 64)	About 50 x 50 (maximum: 96 x 64)	About 50 x 50 (maximum: 96 x 64)	About 25 x 25 (maximum: 48 x 32)
Default Newsstand cover icon for the App Store (required for Newsstand apps)	At least 1024 pixels on the longest edge	At least 1024 pixels on the longest edge	At least 1024 pixels on the longest edge	At least 1024 pixels on the longest edge	At least 512 pixels on the longest edge
Web clip icon (recommended for web apps and websites)	180 x 180	120 x 120	120 x 120	152 x 152	76 x 76

For all images and icons, the PNG format is recommended. You should avoid using interlaced PNGs.

The standard bit depth for icons and images is 24 bits—that is, 8 bits each for red, green, and blue—plus an 8-bit alpha channel.

You don’t need to constrain your palette to web-safe colors.