NFS tips and tricks

Overview

NFS tips and tricks에 대한 기술 문서입니다.

Summary

• 무엇인가? - NFS tips and tricks
• 왜 필요한가? - HPC 및 서버 환경에서 필수 개념
• 언제 사용하는가? - 서버 구성, 성능 튜닝, 문제 해결 시

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Purpose

이 문서가 존재하는 이유

• Goal: NFS tips and tricks에 대한 기술 정보 제공
• Scope: NFS tips and tricks의 개념, 사용법, 설정
• Non-goals: 다른 주제로의 확장

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Key Concepts

Concept	Description	Related
NFS tips and tricks	HPC/서버 환경에서 중요한 기술 개념	Linux, Server

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Detailed Explanation

NFS uses threads on the server to handle incoming and outgoing I/O requests. Using threads helps NFS scale to handle large numbers of clients and large numbers of I/O requests.

dmesg display when reach some high number of clients. should increase Number of NFS daemons (nfsd) by changing the RPCNFSDCOUNT variable in /etc/default/nfs-kernel-server on a Debian-based machine. (Ubuntu 20.04)

Find the number of NFS daemons in two ways
ps -aux | grep nfs
or 
$ ps -aux | grep nfs | wc -l
To change nfsd count temperarly, use 
# rpc.nfsd 16
To change nfsd count permenently increase RPCNFSDCOUNT variable in  /etc/default/nfs-kernel-server (Ubuntu 20.04) then  restart nfs server.
$ cat /etc/default/nfs-kernel-server 
# Number of servers to start up
RPCNFSDCOUNT=64
...
$ sudo systemctl restart nfs-server.service
$ ps -aux | grep nfs | wc -l                
65

<syntaxhighlight lang="bash"> $ nfsstat -r Server rpc stats:

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Best Practices

• 최신 버전 사용 권장
• 공식 문서 참고
• 테스트 환경에서 먼저 검증

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References

• NFS tips and tricks

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Related Pages

• Linux
• Server
• Hardware
• Network

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Knowledge Graph

Related

→ NFS → Network → NFSv4 ACLs → Storage