You can’t connect the dots looking forward; you can only connect them looking backwards. So you have to trust that the dots will somehow connect in your future. The pain you feel when you write is actually the pain of clarifying your thinking.(David Perell)

Algorithm Snowflake

分布式 ID snowflake 算法使用一个 64bits 的正整数作为 ID。64bits 正整数 layout 如下: package stardustman.github.io; public class SnowFlake { // 起始的时间戳 private final static long START_STAMP = 1480166465631L; // sequence number private final static long SEQUENCE_BIT = 12; // machine id bits private final

Master Pki

certificate 目标:绑定 public key 和 name。一切围绕着这个目标来展开。 图解 References 强烈推荐-everything-pki 翻译版-everything-pki ubuntu-trust-store-location decode-an-ssl-certificate c

Java Thread Pool Params

基本策略 关注点分离,任务提交和执行分离。 延迟策略,延迟初始化。 图解 References 你管这破玩意叫线程池

Virtual Memory Address Explore

virtual memory address space layout 代码测试 cargo new vas-explore main.rs use std::{thread,time}; fn main() { println!("Hello, world!"); let sl = time::Duration::from_millis(10000000); thread::sleep(sl); println!("Goodbye, world!"); } cargo build ./target/debug/vas-explore pidof vas-explore /proc/pid/maps stardust@os:x86_64-linux-gnu$ pidof vas-explore 75599 stardust@os:x86_64-linux-gnu$ cat /proc/75599/maps 556a8a831000-556a8a837000 r--p 00000000 08:12 815699 /home/stardust/Desktop/rust/vas-explore/target/debug/vas-explore 556a8a837000-556a8a86e000 r-xp 00006000 08:12 815699 /home/stardust/Desktop/rust/ vas-explore/target/debug/vas-explore # text(code segment) segment 556a8a86e000-556a8a87c000 r--p 0003d000 08:12 815699 /home/stardust/Desktop/rust/vas-explore/target/debug/vas-explore 556a8a87d000-556a8a880000 r--p 0004b000 08:12 815699 /home/stardust/Desktop/rust/vas-explore/target/debug/vas-explore