This article examines the Hearthstone database rollback incident, highlighting the timeline, power‑related hardware failures, backup shortcomings, and offers concrete MySQL backup and server‑monitoring recommendations to prevent similar data loss in game operations.
In March 2012, a privacy‑driven deletion pipeline mistakenly erased hundreds of thousands of Google Music files, prompting SREs to launch a massive data‑recovery effort that involved MapReduce impact analysis, tape‑based backups, and a complete redesign of the deletion system.
This guide explains how to restore a MySQL database that was mistakenly dropped by using a nightly full backup together with binlog files, extracting only the needed incremental statements, filtering out DROP commands, and applying the recovered data in a safe, step‑by‑step process.
After a junior engineer mistakenly ran an unguarded rm -rf command that wiped an entire production server, the author documented the step‑by‑step recovery using ext3grep, extundelete, and MySQL binlog techniques, highlighting the pitfalls and lessons learned for future operations.
This guide shows how to restore a MySQL database that was accidentally dropped by combining a nightly full mysqldump backup (with master‑log info) and the subsequent binlog files, extracting only the needed statements and replaying them in order.
In a two‑day incident, Tencent Cloud's CBS team diagnosed cell failures, implemented directed reads and a dual‑cell merge strategy, and restored three‑copy data integrity, while uncovering monitoring gaps and tool limitations that inform future storage operations.
The article explains how traditional centralized backup indexes become performance bottlenecks as data grows, and details Simpana's two‑level distributed indexing architecture—primary and secondary indexes—showing how it enhances backup speed, reduces network load, and simplifies recovery across multi‑site environments.
This article explains how to simulate a flashback feature for MySQL and MariaDB by parsing binlogs, allowing you to restore tables after accidental DELETE or UPDATE operations without relying on full backups, and provides step‑by‑step commands and precautions.
This article introduces eleven Linux-based data recovery utilities, describing their main features, usage scenarios, and official download links, to help users protect and restore valuable data after hard‑drive failures or system crashes.
This article explains the implementation of Ceph RBD snapshots, the associated metadata structures, clone operations, and the detailed recovery processes for both replica and primary OSDs, illustrating how copy‑on‑write and snapshot chains affect data consistency and performance.
This guide explains how a mistaken script moved and deleted Linux image files, then details step‑by‑step recovery using TestDisk/PhotoRec, the qphotorec GUI, and EasyRecovery, highlighting search strategies, common pitfalls, and results with restored filenames and metadata.
This article explains why recovering deleted data on Ext3/Ext4 Linux filesystems is challenging, describes the role and limitations of the journal log, and provides a step‑by‑step demonstration of using D‑Recovery for Linux to restore files after deletion.
