AstroPaper

Nothing but more and more nothingness.

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Cites

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Inline math

Inline math $e^{\pi i} + 1 = 0$ works fine.

Math Block

Tables

Code

import vgalaxy from "earth";

Code Overflow

define dso_local noundef <8 x float> @_Z3foov() local_unnamed_addr #0 {
  ret <8 x float> <float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00, float 1.000000e+00>
}

ANSI escape sequences

ANSI colors:
- Regular: Red Green Yellow Blue Magenta Cyan
- Bold:    Red Green Yellow Blue Magenta Cyan
- Dimmed:  Red Green Yellow Blue Magenta Cyan

256 colors (showing colors 160-177):
160 161 162 163 164 165
166 167 168 169 170 171
172 173 174 175 176 177

Full RGB colors:
ForestGreen - RGB(34, 139, 34)

Text formatting: Bold Dimmed Italic Underline

Marking full lines & line ranges

// Line 1 - targeted by line number
// Line 2
// Line 3
// Line 4 - targeted by line number
// Line 5
// Line 6
// Line 7 - targeted by range "7-8"
// Line 8 - targeted by range "7-8"

Using diff-like syntax

this line will be marked as inserted
this line will be marked as deleted
this is a regular line

Lists

• 注意这里的 sequential flag
• 这里的 f* 代表以 f 开头的所有文件
• 通过只 watch NEXT LOWER #FILE 减少 rpc 的数量
• 由于在分布式系统中可能会出现 Partial Failure，所以这里的锁并不能保证原子性
  • 在一个分布式系统中，Zookeeper 实现的锁有如下的使用场景
    • 每一个获得锁的 client，需要做好准备清理之前锁持有者因为故障残留的数据
    • Soft Lock 用来保护一些不太重要的数据，例如运行 MapReduce Job 时，可以用这样的锁来确保一个 Task 同时只被一个 Worker 节点执行，也可以用来选举 Master

1. server 的数量是奇数
2. 必须凑够过半的服务器来批准完成任何的操作
   1. 如果网络存在分区，那么必然不可能有超过一个分区拥有过半数量的服务器
   2. 这里的过半是所有服务器数量的一半，而不是当前可用的服务器数量的一半

Links

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Images

Mermaid

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