迟猫猫🐱 @iskyzh profile

迟猫猫🐱

@iskyzh

Followers

26,313

Following

954

Media

207

Statuses

1,923

这个人很菜，什么也不会 / 面对命中注定的失败

https://t.co/YJTtxnT14A

Pittsburgh ⇌ Shanghai

Joined February 2015

Don't wanna be here? Send us removal request.

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迟猫猫🐱

@iskyzh

5 months

今日 CMU 🤣

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@iskyzh

2 months

我和两个 CMU 硕士朋友一共三个人的小样本，今年 H1B 抽签全中了 🤣

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@iskyzh

4 months

Mini-LSM：可能是史上最完整的 LSM-Tree 存储课程

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@iskyzh

8 months

上个月只面试了两家公司，累得半死。加上 return offer 一共三个公司，最后做了个决定。花了几个小时写了两封比较长的拒信发出去了，it's hard to make a decision（

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@iskyzh

1 year

在 CMU，你甚至可以学习原神和日麻（

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@iskyzh

5 months

在 CMU（北美小衡水）的最后一个学期结束了，感觉彻底失败了

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@iskyzh

1 year

虽然没啥实际用途，但还是要给 CMU 的同学们推荐一下 Compilers，为数不多的没有期中期末考的 system 课写了两个星期 SSA 和 register allocation 优化，对着几百行的 IR 人肉找 bug 已经麻木了（

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@iskyzh

9 months

八爷推特上永远的两条主线：装修被骗、App 被下架 🤣

Baye aka 威力狈

@waylybaye

9 months

暴雷了 🤣 我交了钱，对方让我签空白合同，我没签，然后约定下一次到店签纸合同。去之前微信沟通了一下发现对方无法满足我的需求，就要求退款，对方说根据合同要扣违约金，但我们还没签合同。这种情况起诉的话胜率大吗？🤣

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@iskyzh

9 months

每次穿这件衣服出门都会有路人夸这件衣服好看 🤣🤣 人类无法抵挡阿尼亚的魅力

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@iskyzh

1 year

年轻人的第一个 Rust PR 总算被合并了（

suggest lifetime for closure parameter type when mismatch by skyzh · Pull Request #105888 ·...

This is a draft PR, will add test cases later and be ready for review. This PR fixes #105675 by adding a diagnostics suggestion. Also a partial fix to #105528. The following code will have a compil...

github.com

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@iskyzh

4 months

一周写个 vector database，今天更新完了 HNSW 部分的教程和测试用例，暂时写完告一段落了 🤪 有空的话再更新 Rust 版 🤤

GitHub - skyzh/write-you-a-vector-db: A Vector Database Tutorial (over CMU-DB's BusTub system)

A Vector Database Tutorial (over CMU-DB's BusTub system) - skyzh/write-you-a-vector-db

github.com

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@iskyzh

8 months

Duolingo 这个 widget 真是太逆了 🤪

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@iskyzh

1 year

It's time to replace my LaTeX-generated resume with @typstapp 🤪

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@iskyzh

1 month

伊斯坦布尔 🌞🌞

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@iskyzh

1 year

Simple CV Template for @typstapp 🤪

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@iskyzh

9 months

昨天去了巨硬办公室，感叹大厂的办公室真是太 fancy 了（

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@iskyzh

1 year

在美国半年多，感觉我的心态变化挺大。比较明显的一点是对于风险更加谨慎了。以前和 startup 聊天觉得做的事情有意思就行了；现在会更多考虑公司的靠谱程度是否足够，有没有令人在意的地方。比如我现在隔两周就会看看想去的公司有没有人员变动，以及 git 提交记录 🤣

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@iskyzh

4 months

a simple LSM-tree in a week ➡️ an engine with persistence and better performance in another week ➡️ an engine with multi-version concurrency control in the final week. The full Mini-LSM course is now available! Build your Rust storage engine in 3 weeks ⬇️

GitHub - skyzh/mini-lsm: A tutorial of building an LSM-Tree storage engine in a week!

A tutorial of building an LSM-Tree storage engine in a week! - skyzh/mini-lsm

github.com

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迟猫猫🐱

@iskyzh

1 year

下周要入职新公司了，期待+焦虑 😭😭

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@iskyzh

1 year

一项保护艺术作品免受AI-for-Art模仿的图像预处理工具 // 给图片加水印使得 AI 无法学习，有点厉害.png

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@iskyzh

9 months

@JayiceZz 留学中介是这样的啊，不让你焦虑的话你就不会买单了；我当年和留学中介讲我计算机系第一，国奖，维护多个 1k+ star 开源项目，他们就说背景还差一点科研，要买他们的暑假科研带做项目 🤣

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@iskyzh

9 months

Stanford 的饭都是比匹兹堡香的 😭😭😭

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@iskyzh

1 year

感觉我的本科时光过得比现在幸福一点。在东川路技工学校的大部分时间都在上水课和写作业，但生活总体而言还是比较轻松的；现在生活中的不确定性变多了，经常在思考人生，这就是长大的坏处吧（

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@iskyzh

1 year

GitHub 5k follower 了（

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@iskyzh

9 months

Google 办公室真的是人间天堂啊 😭😭😭😭

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@iskyzh

1 year

连续写了 12 个小时 compiler 作业，重写了整个 codegen 后端和 register allocation 😭😭😭

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@iskyzh

1 year

成功人士的作品 @LightQuantumhah ，直接把 rsync 协议接收的数据传到 s3 上，大大减小了镜像站的存储成本（

GitHub - sjtug/rsync-sjtug: Mirroring remote repositories to s3 storage, with atomic updates and...

Mirroring remote repositories to s3 storage, with atomic updates and periodic garbage collection. - sjtug/rsync-sjtug

github.com

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@iskyzh

1 year

情人节晚上，五个 CMU 男同学一起去吃烧烤，这就是北美小衡水

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@iskyzh

9 months

in this semester, we decide to use @duckdb in @CMUDB 's IntroDB SQL homework! - blazing fast - lateral joins - beautiful output - postgres compatible

Homework #1 - SQL - CMU 15-445/645 :: Intro to Database Systems (Fall 2023)

Overview The first homework is to construct a set of SQL queries for analyzing a dataset that will be provided to you. For this, you will look into MusicBrainz data. This homework is an opportunity...

15445.courses.cs.cmu.edu

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@iskyzh

1 year

听说最近有人拿着我的简历到处投，甚至发到小红书上求建议 🤣

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@iskyzh

1 year

在思考下一份全职工作要不要直接面 entry level + 1 的岗位，感觉我已经不完全是 new grad 了（

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@iskyzh

10 months

太卷了！我以后要是有小朋友，我要在五岁前教会数据库的 4 个隔离级别和 10 个 MVCC 的实现方法 🙈

花果山大圣

@shengxj1

10 months

今天给娃讲Vue源码，给他讲哭了

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@iskyzh

7 months

@heytea_boys 我面试一般都是会问一下 1-3 年的 roadmap，感觉路线不靠谱/老板没想清楚的我都会拒掉 offer（

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@iskyzh

1 month

今天买车了，下周去提车 🤤😻

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@iskyzh

3 months

现在很喜欢做家务，感觉年纪大了以后喜欢做家务是有原因的。做家务是一种 meditation，可以放空身体，净化心灵 😇😭🙈

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@iskyzh

1 year

冷知识：CMU 的邮编是 15213，Intro to Computer Systems / CSAPP 的课号也是 15-213（

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@iskyzh

11 months

今日思考：为什么纽约不叫新约，新泽西不叫纽泽西（

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@iskyzh

5 months

一点微小的贡献 🤪

GitHub - cmu-db/optd: CMU-DB's Cascades optimizer framework

CMU-DB's Cascades optimizer framework. Contribute to cmu-db/optd development by creating an account on GitHub.

github.com

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@iskyzh

3 months

在思考下一个 tutorial 写啥（ 1. Rust version write you a vector DB (之前写了一个 C++ version ) 2. A Journey in Linux I/O System，大概讲一讲从 pread/pwrite 到 block device 具体经过了哪些组件，以及各种有趣的小实验（

Rust Vector DB

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Journey in Linux I/O

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@iskyzh

11 months

GitHub 彻底寄了 🤣

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@iskyzh

8 months

got something new… 🤪

迟猫猫🐱

@iskyzh

8 months

getting all my gaming stuff onto an IKEA table cart 🛒

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@iskyzh

5 months

behind the scenes of this semester's CMU Database Systems course

My Final Semester in BusTub

In the last semester of Chi’s time in CMU, he made a lot of changes to the BusTub project... In this blog post, he shares his experience of the story of the BusTub MVCC project and how to design a...

www.skyzh.dev

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@iskyzh

1 year

感觉已经懂完 LLVM debug info 了。刚刚给这学期写的 Compiler 加上了 LLVM debug info 支持，甚至还能解析函数参数，按行号打断点；美中不足的地方是 debug info 生成在 SSA form 上而不是原始的 C0 输入（

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@iskyzh

8 months

每天都要看看一亩三分地来保持自己的焦虑感（

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@iskyzh

4 months

build a vector database (with IVFFlat + HNSW vector indexes) over BusTub

GitHub - skyzh/write-you-a-vector-db: A Vector Database Tutorial (over CMU-DB's BusTub system)

A Vector Database Tutorial (over CMU-DB's BusTub system) - skyzh/write-you-a-vector-db

github.com

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@iskyzh

4 months

在广州卷了三天，Mini-LSM Part 3 基本上写完了，就是不知道写得对不对 🤪 下周写测试和 writeup

GitHub - skyzh/mini-lsm: A tutorial of building an LSM-Tree storage engine in a week!

A tutorial of building an LSM-Tree storage engine in a week! - skyzh/mini-lsm

github.com

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@iskyzh

1 year

#冷知识 CMU 15-445 Database Systems 的 BusTub 数据库系统里面有一张系统表，记录每个学期的 TA 有哪些人 🤪

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@iskyzh

10 months

我这种失败做题家是这样的，看见 leetcode 就热血沸腾

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@iskyzh

5 months

今天逛了人民公园相亲角，相亲失败了；作为一个在上海从小长大的人，从来没去过，实在惭愧

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@iskyzh

2 months

太吓人了……

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@iskyzh

10 months

最近渐渐养成了每天写点东西的习惯，并且从 LogSeq 切换到了 Obsidian（

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@iskyzh

4 months

持续关注了一段时间知乎上 CMU Database Systems 的踩坑经验文章，根据这些文章的描述和反馈，我不得不承认上学期的 MVCC project 难度可能确实有点升天了 🤣

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@iskyzh

9 months

Finished my incredible 3-month internship @neondatabase today! The velocity we deliver here is absolutely invigorating. I had missed this level of fast-paced innovation and growth at school. Grateful for the opportunity to contribute and learn in such an exciting environment!

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@iskyzh

9 months

一算发现我已经有两年实习经历了，能不能给我个 L4 😭😭😭

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@iskyzh

7 months

working on something new for CMU-DB's BusTub system... 🤪

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@iskyzh

1 year

看到一个朋友去参观 CMU 原神课程的期末考试了，叹为观止 🙈

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@iskyzh

1 year

某论坛上的亚麻伤痕文学看多了之后，感觉工作也就那么一回事，不要期待太高（

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@iskyzh

1 year

大的来了！

Release RocksDB 8.0.0 · facebook/rocksdb

8.0.0 (02/19/2023) Behavior changes ReadOptions::verify_checksums=false disables checksum verification for more reads of non-CacheEntryRole::kDataBlock blocks. In case of scan with async_io enable...

github.com

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@iskyzh

5 months

新年快乐！Happy New Year!

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@iskyzh

1 year

终于能放假了 😭😭😭 Spring Carnival 😍😍😍 CMU 里的游乐园 🥵🥵🥵

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@iskyzh

5 months

迟宝宝的匹村 CMU 秋游记

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@iskyzh

11 months

小红书还是太抽象了，一早上起来又在其他账号下面看到了我的简历.png

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@iskyzh

5 months

今年代码写得比以前少了 🤣 失败.png

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@iskyzh

6 months

This year, students in CMU-DB's database course will implement HyPer / Umbra MVCC in BusTub! 🤪

Project #4 - Concurrency Control - CMU 15-445/645 :: Intro to Database Systems (Fall 2023)

Do not post your project on a public GitHub repository. Overview In this project, you will add transaction support for BusTub by implementing optimistic multi-version concurrency control (MVOCC). The...

15445.courses.cs.cmu.edu

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@iskyzh

1 year

感恩大家的日语（みんなの日本語）初级单词这个 Anki Deck，背了快一周了，感觉良好（

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@iskyzh

1 year

我决定从明天起晚上八点后不写作业，过上 study-life balance 的生活 😇

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@iskyzh

1 year

Database mug collection 🤪

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@iskyzh

1 year

没想到小红书上我的简历的传播范围如此之广 🤣（今日 DB Lab 聚餐有感）

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@iskyzh

1 month

原来我排名有前一百 🤪

小弟调调

@jaywcjlove

1 month

如果你想看 Github中国/全球用户排名，我有个仓库每天爬这个数据生成 HTML，已经爬了 5 年 👉 我将它发布到 npm 上，已经发布 1,676 个版本，这是因为可以预览 npm 里面的 HTML，我有不少组件库的网站发布到 npm 上面，可以访问历史版本的文档

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@iskyzh

1 year

我的这一生在 GitHub 上开了 2480 个 PR（

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@iskyzh

5 months

with Apple recently released MLX for ML on Apple platforms, today in CMU's Deep Learning System course, my team presented Metal backend for the needle ML framework as our course project 😋 it's been a fantastic semester thanks to @tqchenml @zicokolter !

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@iskyzh

1 year

到此一游.png

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@iskyzh

1 year

来自 @waylybaye 的鼓励 🥵🥵😍😍

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@iskyzh

11 months

我超，这个老师画的图好可爱 🤣

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@iskyzh

9 months

下一篇草稿箱里的文章...

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@iskyzh

29 days

不止一次在匹村看到这辆上了香港车牌的车 🤣

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@iskyzh

5 months

匹村乡下人进城了（

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@iskyzh

1 year

I was writing a wiki page for Materialize recently as a course project for @CMUDB . It's fun to dive into the codebase of a project and learn something. Some interesting findings ⬇️

Database of Databases — Materialize

Materialize is a streaming database. It ingests data from sources (i.e., Kafka, Postgres CDC), incrementally maintains materialize views, and allows users to query or subscribe the data using Postgre…

dbdb.io

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@iskyzh

1 year

真好啊 😭😭😭

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@iskyzh

9 months

well, it’s been a year… 😛 time goes by so fast

A Year in BusTub

This blog post revisits everything that has happened in BusTub in the past year and sets the next milestone for the system.

www.skyzh.dev

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@iskyzh

1 year

@waylybaye @TomBener 给本失败人士暑假要去实习的公司打个广告，Postgres on Vercel（（

Neon Postgres – Vercel

Serverless Postgres with branching

vercel.com

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@iskyzh

1 year

糊完了今年 CMU Advanced Database 的 project 1。Rust 写 Postgres extension 的坑挺多的，但写具体插件逻辑实在是太方便了。过几天有空了就给 cargo-pgx 修 bug（

Project #1 - Foreign Data Wrapper - CMU 15-721 :: Advanced Database Systems (Spring 2023)

Overview The first programming project will teach you how to extend PostgreSQL with columnar storage and a custom access method. Specifically, you are tasked to implement a foreign data wrapper as a...

15721.courses.cs.cmu.edu

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@iskyzh

9 months

冷知识：这个 VSCode GitHub issue 链接在微信里打开是这样的（

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@iskyzh

11 months

在匹兹堡远程工作的体验比我之前想象的好得多。下班以后去松鼠山吃吃喝喝，周末和同学打桌游，感觉之前上学的时候就是因为事情太多了所以没有体验到这个城市的生活气息😭😭😭 而且匹村的夏天不太热，每天出门散步都觉得很舒适和放松（

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@iskyzh

11 months

time flew by and it's already been a month since I began my internship at @neondatabase 🤪

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@iskyzh

3 months

浦东机场晚上人也不算很多，从 checkin 到过海关和安检总共就花了半个小时 🥵 在身上背了两台电脑，一个 iPad，一个 Kindle，一个 Switch，两个充电宝，一把键盘，总共十公斤，感觉腰要断了 🤪

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@iskyzh

9 months

Hello Seattle 🤪

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@iskyzh

2 months

#pittsburgh #cherryblossom 一点匹村印象（

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@iskyzh

8 months

YouTube 真的适合看内娱，有很多节目的高画质完整版，而且开 Premium 完全没广告（

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@iskyzh

4 months

CRDT in BusTub 🤪

Project #0 - C++ Primer - CMU 15-445/645 :: Intro to Database Systems (Spring 2024)

Do not post your project on a public Github repository. Overview All the programming projects this semester will be written on the BusTub database management system. This system is written in C++. To...

15445.courses.cs.cmu.edu

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@iskyzh

9 months

曾博一天一百条推的秘诀：等红灯的时候堵车的时候都在发

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@iskyzh

1 year

草，思考了一个月如何在 BusTub 上正确的实现 2PL + Isolation Level，今天写完测试，想到几个 edge case，不知道该不该测；然后读到了 A Critique of ANSI SQL Isolation Levels，醍醐灌顶，推倒重来，不知道下个月开始前能不能写完 😭😭😭

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@iskyzh

1 year

绷不住了