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Actual exam question for Linux Foundation's CKA exam Question #: 51 Topic #: 1
Describe the difference between 'ReadWriteOnce' and access modes for PersistentVolumeClaims. In what scenarios would you choose each?
Suggested Answer:
See the solution below with Step by Step Explanation. Explanation: Solution (Step by Step) : ReadWriteOnce: - Description: This mode allows only one pod to mount the volume at a time. - Scenarios: Ideal for applications requiring exclusive access to the storage, such as databases where data integrity is crucial. Examples include: - Single-instance databases (e.g., MySQL, PostgreSQL) - Applications that modify files concurrently and need to ensure consistency. ReadWriteMany: - Description: This mode allows multiple pods to mount the volume simultaneously. - Scenarios: Suitable for applications that need shared access to data, such as shared storage for applications, I configuration files, or log files. Examples include: - Shared file systems (e.g., NFS, GlusterFS) - Applications where multiple pods need to access the same data simultaneously.
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