Note to self: use the sparse switch when moving data around with tar

Using a tar pair to move data between two systems, over an NFS link. This is faster than over ssh (ssh isn’t a fast transport layer).

Some user wrote a sparse file out.

An 11PB sparse file.

Which the tar happily … happily I tell you !!! was trying to copy, in its entirety, over to the backup unit.

Happily.

Took me a quick look to see what was going on. It had copied 9TB of the 11PB file by the time I’d caught it.

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