Changes between Version 57 and Version 58 of SftpFrontend


Ignore:
Timestamp:
2011-01-08T05:19:46Z (14 years ago)
Author:
davidsarah
Comment:

twisted rekeying bug

Legend:

Unmodified
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Modified
  • SftpFrontend

    v57 v58  
    2424
    2525The '{{{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 [http://tahoe-lafs.org/trac/tahoe-lafs/browser/docs/frontends/webapi.rst#about-the-metadata 'About the metadata' section of webapi.rst]). 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.
     26
     27Versions 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 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; this problem will typically only affect long-lived connections or very large files. Some clients have options to disable rekeying (see below for openssh, sshfs and WinSCP).
    2628
    2729
     
    8385 * In the Environment section, set 'UTF-8 encoding for filenames' to 'On'.
    8486 * In the Connection section, set 'Server response timeout' to the maximum 6000 seconds.
     87 * In the Key exchange section under SSH, set both 'Max minutes before rekey' and 'Max data before rekey' to 0. (This works around a potential bug in Twisted's SSH implementation by disabling rekeying.)
    8588
    8689Note that these options are not persistent unless you save them as a 'Stored session', together with the host name, username, etc.