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This stores the sequence number in BASEDIR/announcement-seqnum, and increments it each time any service is published (every service announcement is regenerated with the new sequence number). As everyone knows, time is an illusion, and occasionally goes backwards, so a counter is generally safer (and reveals less information about the node). Later, we'll improve the introducer client to tolerate rollbacks (where, perhaps due to a VM being restarted from an earlier checkpoint, the stored sequence number reverts to an earlier version).
========== Tahoe-LAFS ========== Tahoe-LAFS is a Free Software/Open Source decentralized data store. It distributes your filesystem across multiple servers, and even if some of the servers fail or are taken over by an attacker, the entire filesystem continues to work correctly and to preserve your privacy and security. To get started please see `quickstart.rst`_ in the docs directory. LICENCE ======= Copyright 2006-2012 The Tahoe-LAFS Software Foundation You may use this package under the GNU General Public License, version 2 or, at your option, any later version. You may use this package under the Transitive Grace Period Public Licence, version 1.0, or at your option, any later version. (You may choose to use this package under the terms of either licence, at your option.) See the file `COPYING.GPL`_ for the terms of the GNU General Public License, version 2. See the file `COPYING.TGPPL.rst`_ for the terms of the Transitive Grace Period Public Licence, version 1.0. See `TGPPL.PDF`_ for why the TGPPL exists, graphically illustrated on three slides. .. _quickstart.rst: https://tahoe-lafs.org/source/tahoe-lafs/trunk/docs/quickstart.rst .. _COPYING.GPL: https://tahoe-lafs.org/trac/tahoe-lafs/browser/COPYING.GPL .. _COPYING.TGPPL.rst: https://tahoe-lafs.org/trac/tahoe-lafs/browser/COPYING.TGPPL.rst .. _TGPPL.PDF: https://tahoe-lafs.org/~zooko/tgppl.pdf