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List:       freebsd-fs
Subject:    Monitoring FS changes
From:       Chris Stankevitz <chris () stankevitz ! com>
Date:       2015-12-31 7:24:00
Message-ID: 5684D810.6070700 () stankevitz ! com
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Hi,

I have a directory /foo that recursively contain ~250,000 files/directories.

I would like my application to know when a file is added, removed, or 
modified under /foo.  Is there a way to do that with FreeBSD?

I believe on linux a facility called iNotify accomplishes this.

On OSX a facility called FSEvents accomplishes this.

kqueue apparently requires me to open every file and/or directory in my 
tree... which won't work because I have so many.

Is there any other option?  Perhaps

i=0
while (true)
{
  zfs snapshot pool/foo@${i}
  zfs diff pool/foo@${i-1} pool/foo@${i}
  ++i
}

Thank you,

Chris
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