Database Durability
Everything on SkillVeris tagged Database Durability — collected across the glossary, study notes, blog, and cheat sheets.
3 resources across 1 library
Interview Questions(3)
What is a Write-Ahead Log (WAL) and Why Do Databases Use One?
A write-ahead log (WAL) is a durability mechanism where the database records every change as a sequential log entry on stable storage before it modifies the ac…
How Does the Write-Ahead Log Enable Crash Recovery?
The write-ahead log enables crash recovery because, on restart, the database replays log records to redo committed changes that never made it to data pages, th…
What is Checkpointing in a Database and Why is it Needed?
Checkpointing is the process of periodically flushing all dirty (modified but unwritten) data pages from memory to disk and recording a marker in the write-ahe…