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P5-file-nfslock
Jul 20, 2023
Perl module to do NFS (or not) locking
FileNFSLock - perl module to do NFS or not locking.
The module is based of concept of hard linking of files being atomic across NFS. This concept was mentioned in MailBoxLocker which was originally presented in MailFolderMaildir. Some routine flow is taken from there – particularly the idea of creating a random local file, hard linking a common file to the local file, and then checking the nlink status. Some ideologies were not complete uncache mechanism, shared locking and some coding was even incorrect wrong stat index. FileNFSLock was written to be light, generic, and fast.
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