NFS

Q: How deeply does Amazon Web Services in Action, Third Edition: An in-depth guide to AWS cover NFS?

Explains NFS through EFS architecture, storage comparisons, mounting, performance, monitoring, and backups.

As explained in Amazon Web Services in Action, Third Edition: An in-depth guide to AWS

NFS is a network file system protocol that allows clients to access files on remote servers as if they were local files.

NFS is a network file system protocol that lets machines mount and access files stored remotely as though they were part of a local filesystem. In AWS, Amazon Elastic File System (EFS) provides a managed, scalable, highly available NFS implementation. section 9.0

NFS is useful when multiple virtual machines must read and write the same files. EFS supports parallel access from multiple EC2 instances, including instances in different availability zones, making it suitable for shared application files and user uploads. section 9.0 section 2.1

Choose NFS-backed storage when the application needs shared filesystem semantics:

Use it for legacy applications that store state or uploaded content as ordinary files rather than objects. section 9.0
Mount one filesystem on multiple Linux EC2 instances so load-balanced web servers see the same application files and uploads. section 9.0 section 2.1
Prefer EFS over a single EBS volume when shared access or higher availability is required; EBS is attached to one instance within one data center. section 9.0

WordPress behind a load balancer

Two EC2 web servers run WordPress behind a load balancer. EFS, mounted by both servers through NFSv4.1, stores WordPress application files and user-uploaded images, so either server can handle a request without needing a separate copy of the files. section 2.1

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Related concepts

file systemcontrasts with · A file system is a software-managed structure and interface for organizing, naming, storing, and accessing files and directories on storage.
EFS storageused by · EFS storage is managed, elastic network file storage provided by Amazon Elastic File System and shared among compute resources.
access control listuses · An access control list is a collection of rules specifying which subjects or traffic may access a resource or perform particular operations.
port numberuses · A port number is a numeric transport-layer identifier that directs network traffic to a service or application endpoint on a host.
infrastructurepart of · Infrastructure is the foundational physical, digital, and operational resources and systems that support an organization, computing system, or service.

This explainer was generated by Manning's knowledge graph from the text of Amazon Web Services in Action, Third Edition: An in-depth guide to AWS. The section links point to the parts of the book it draws on.