I am using mkdir as a locking mechanism, and to my knowledge mkdir is atomic, but it is not atomic over nfs. So my question is simple, is mkdir atomic over sshfs?
Ssh – Is mkdir atomic over sshfs
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I am using mkdir as a locking mechanism, and to my knowledge mkdir is atomic, but it is not atomic over nfs. So my question is simple, is mkdir atomic over sshfs?
Best Answer
I don't know if it is enabled or disabled by default, but mkdir can be cached:
http://goo.gl/QIW4V (cache_mkdir)
Even though the mkdir command itself looks atomic and thread safe enough...
http://goo.gl/LC1Ze (sshfs_mkdir)
http://goo.gl/NHkNH (sftp_request_send)
I would go out on a limb and say that mkdir over sshfs is not atomic, because of the caching.