nfs version 과 sparse file

nfs 에서도 sparse file을 지원은 하는데 NFS v4.2 이후부터라고

NFS V4.2 ? Feature ● Sparse File Support ? Sparse files are ones which have allocated or uninitialized blocks in the file. (1.4.3) ● SEEK - Find the Next Data or Hole ● NFS: Implement SEEK (Sep 2014) ● READ_PLUS - READ Data or Holes from a File ● No published upstream patches yet ● Prototype patches improve performance with reading holes (See Anna’s keynote graph).

[링크 : https://events.static.linuxfound.org/sites/events/files/slides/Vault2017.pdf]

특정 버전으로 제한하는 법은 아래와 같은데 소수점 버전은 없네?

To specify NFS version, use -o option # mount -t nfs -o vers=4 192.168.1.10:/mnt/data /data or # mount -t nfs -o vers=3 192.168.1.10:/mnt/data /data

[링크 : https://computingforgeeks.com/configure-nfsv3-and-nfsv4-on-centos-7/]

버전 확인하기

근데 여전히 소수점 버전은 확인이 불가능 하다.

nfsstat

[링크 : https://unix.stackexchange.com/questions/115918/how-to-determine-if-nfs-mount-is-mounted-as-v3-or-v4]