[tahoe-dev] backup, revision control

David-Sarah Hopwood david-sarah at jacaranda.org
Tue Jan 18 02:33:42 UTC 2011


On 2011-01-18 02:25, David-Sarah Hopwood wrote:
> The SFTP protocol has some limitations as a filesystem access protocol,
> though, because it doesn't support remote-to-remote file copies or
> moves without dragging bytes across the wire, and there is no support
> for recursive operations without doing the directory traversals on
> the client (unlike other candidate filesystem access protocols such as WebDAV)
> [*].

Correction: SFTP does support efficient remote-to-remote moves without
dragging the bytes over the wire. It can also move a whole directory
subtree (or more precisely a link to it) in one operation. It is just
copies that require byte shuffling. That is probably an artifact of the
POSIX filesystem interface not having a file copy operation, which is
a broken design even for local filesystems.

-- 
David-Sarah Hopwood  ⚥  http://davidsarah.livejournal.com

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