openssh/sshfs options
[Imported from Trac: page SftpFrontend, version 60]
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@ -25,7 +25,7 @@ See the last section of [docs/frontends/FTP-and-SFTP.rst](http://tahoe-lafs.org/
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The '`ctime`' and '`mtime`' attributes will always be the same, and are set from the Tahoe `linkmotime` timestamp, which is changed only when the link from the parent directory is modified (see the ['About the metadata' section of webapi.rst](http://tahoe-lafs.org/trac/tahoe-lafs/browser/docs/frontends/webapi.rst#about-the-metadata)). These fields are not updated when the contents of a mutable file are changed. The SFTP protocol and the server are able to represent dates up to the year 2106, but some clients may print dates incorrectly after 2037.
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Versions of Twisted up to and including 10.2 have [a bug in support for rekeying](http://twistedmatrix.com/trac/ticket/4395). This might cause a hang or 100% CPU usage by the gateway when a client tries to rekey. Depending on the client, rekeying may be triggered based on a time interval or the amount of data sent (for example, 1 GiB to 4 GiB for the openssh client); this problem will typically only affect long-lived connections or very large files. Some clients have options to disable rekeying:
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* for openssh and sshfs, add the line `RekeyLimit 0` to `~/.ssh/config` (TODO: please test this!)
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* for OpenSSH and sshfs, either use the option `-o [RekeyLimit](RekeyLimit)=0`, or add the line `RekeyLimit=0` to `~/.ssh/config` (TODO: please test this!)
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* for WinSCP, [#WinSCP see that section below].
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