Synology DSM – ext4 vs btrfs 파일 시스템 용도

DSM을 처음 인스톨하면 Volume을 생성하게 되는데, 과거 DSM의 경우 ext4가 기본으로 되어 있었지만,

지금 현재 DSM 6.0 이후 버전부터는 btrfs로 적용하도록 되어 있다.


Btrfs의 경우 좋은 점도 많이 있지만 안정성 면에선 ext4보다 못하다는 점이 가장 큰 단점이라 하겠다.

그래서 나의 경우 두대의 DSM을 사용하고 있는데, 사용 용도에 맞게 긱기 다른 파일 시스템을 적용해서 사용하고 있다.


영화 및 Media 파일이 많은 곳은 ext4로 셋팅

일반 파일, 즉 문서, 사진, website와 같은 경우는 btrfs로 셋팅해서 사용중이다.


이유는 문서, 사진, Website와 같은 일반파일이 많은 경우 파일 사이즈가 작고, 수시로 업데이트가 많은 파일의 경우 btrfs로 셋팅 했을때 장점이 훨씬 많다고 생각했다. 즉, Snapshot 같은 기능은 btrfs에서만 사용할수 있는데, snapshot의 주요 기능이 바로 snapshot을 찍어 놓은 곳으로 되돌릴수 있다는 장점이 있다. 그런데 shared folder 전체를 되돌리는 것이 아니라. 각 파일 단위로 되돌릴수 있기 때문에 개인적으로 versioning 으로 활용될 수도 있기 때문에 수시로 변경되는 파일이 많은 경우 꼭 필요한 기능이라고 생각한다.


만약 ext4에서 versioning을 하기 위해서는 Cloud Station을 이용하는 방법과, Hyper Backup 으로 백업을 이용하는 방법이 있다.

(참고로 위해서 말했지만, ext4 파일 시스템에서는 snapshot 기능을 사용할수 없다.)



이전 Post에서도 말했지만, Snapshot replication 기능을 사용하기 위해서는 Backup Server도 Btrfs 파일 시스템으로 셋팅되어져 있어야 한다.나의 경우 두대의 DSM이 각기 다른 파일 시스템이기 때문에 snapshot replication 기능은 사용할 수가 없었다.


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