How Bloom Filters Work: Hash Bits, False Positives, and Why Deletion Is Hard
A cache, a database, and a CDN edge often need the same cheap answer: have I seen this key before? Storing every key is correct and expensi...
Homepage Alpha Technology
Featured Post
How Bloom Filters Work: Hash Bits, False Positives, and Why Deletion Is Hard
A cache, a database, and a CDN edge often need the same cheap answer: have I seen this key before? Storing every key is correct and expensi...
Sarthak Bystander
12 Sept, 2026
Latest Posts
How System Calls Work: User Mode, Kernel Mode, and Crossing the Boundary
A user program cannot talk to a disk controller, change another process's page tables, or bind a TCP port by executing ordinary instruct...
Sarthak Bystander
11 Sept, 2026
How Raft Works: Leader Election, Replicated Logs, and Majority Quorums
A replicated database, a Kubernetes control plane, and a coordination service all need the same guarantee: after a machine dies, the survivo...
Sarthak Bystander
10 Sept, 2026
How QUIC Works: Streams, Connection IDs, and Why HTTP/3 Left TCP
TCP names a connection by four numbers: two addresses and two ports. Change any of them and the connection is gone. It also delivers one ord...
Sarthak Bystander
9 Sept, 2026
How Consistent Hashing Works: Rings, Virtual Nodes, and Why Keys Move
A cache cluster, a sharded database, and a content-delivery edge all share one problem: given a key, which machine should own it? The naive...
Sarthak Bystander
8 Sept, 2026
How UDP Works: Datagrams, Checksums, and Why Loss Can Be Acceptable
TCP can deliver a reliable byte stream. That is useful when a file must arrive complete and in order. It is the wrong contract when a late p...
Sarthak Bystander
7 Sept, 2026
How Linux Containers Work: Namespaces, cgroups, and Isolation
A container is not a miniature virtual machine and it is not a special object inside the Linux kernel. It is a process, or a tree of process...
Sarthak Bystander
7 Sept, 2026
How WebSockets Work: Handshake, Frames, and Persistent Connections
HTTP can fetch a page. TCP can keep a reliable byte stream open. Neither explains why a live chat box updates without a refresh or why a tra...
Sarthak Bystander
7 Sept, 2026
How Garbage Collection Works: Mark-and-Sweep, Generational Collectors, and Pause Times
Garbage collection is the runtime mechanism that finds heap objects a program can no longer reach and reclaims their memory. Manual allocato...
Sarthak Bystander
6 Sept, 2026
How Virtual Memory Works: Pages, Page Tables, and Page Faults
Why virtual memory exists A process does not own a private bank of RAM chips. It owns a private address space: virtual addresses the CPU wi...
Sarthak Bystander
5 Sept, 2026