《Operating System Concepts》學(xué)習(xí)第 62 天，p735-p737 總結(jié)，總計(jì) 3 頁(yè)。

一、技術(shù)總結(jié)

1.distributed system

(1)定義

A collection of loosely coupled nodes interconnected by a communication network(一組通過(guò)通信網(wǎng)絡(luò)相互連接的松散耦合節(jié)點(diǎn))。

(2)打造分布式系統(tǒng)的原因

resource sharing、computation speedup、reliability。

2.network structure

local-area networks (LAN)、wide-area networks (WAN).

二、英語(yǔ)總結(jié)(生詞：3)

1.interconnect

(1)interconnect: inter-("between, among") + connect

vi/vt. connect with each other.

(2)示例

To completely understand the roles and types of distributed systems in use today, we need to understand the networks that interconnect them(《Operating System Concepts》第 735 頁(yè))。

(3)connect vs interconnect

1)connect is used for two object.

2)interconnect is used for multiple objects.

2.emerge

(1)emerge: e-("out") + mergere("to dip, sink")

vi. emerge literally means "to rise out from liquid", appear(出現(xiàn))。

(2)示例

Local-area networks emerged in the early 1970s as a substitute for large mainframe computer systems(《Operating System Concepts》第 736 頁(yè))。

3.ubiquitous

(1)ubiquity: ubi-("where") + -quity("a suffix indicating state or quality")

u.the fact of being everywhere。

(2)ubiquitous: ubiquity + -ous

adj. being everywhere("無(wú)處不在")。

(3)示例

WiFi is now ubiquitous and either supplements traditional Ethernet networks or exists by itself(《Operating System Concepts》第 737 頁(yè))。

關(guān)于英語(yǔ)的注解同步更新匯總到 https://github.com/codists/English-In-CS-Books 倉(cāng)庫(kù)。

三、其它

近來(lái)感冒，頭痛欲裂，不想看書(shū)。

四、參考資料

1. 編程

(1) Abraham Silberschatz，Peter Baer Galvin，Greg Gagne《Operating System Concepts》：https://book.douban.com/subject/30272539/

2. 英語(yǔ)

(1) Etymology Dictionary：https://www.etymonline.com

(2) Cambridge Dictionary：https://dictionary.cambridge.org

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