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Apurv Gujjar
Apurv GujjarDevOps & Cloud Engineer
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Interview DocumentationLinuxWhat is journaling in ext4?
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Q13

What is journaling in ext4?

💬Answer

Journaling maintains a dedicated log file (the journal) where file write intentions are written before changes are applied to the main filesystem blocks. If a server loses power mid-write, the kernel reads the journal on reboot to complete or roll back incomplete writes, preventing filesystem corruption.

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Apurv Gujjar - DevOps & Cloud Engineer
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Apurv Gujjar

DevOps & Cloud Engineer

Specialized in:DevOpsAWSGCPKubernetesTerraformDocker
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