From: Kevan Carstensen Date: Wed, 4 Nov 2009 12:28:49 +0000 (-0700) Subject: Add more tests for comment:53 in ticket #778 X-Git-Url: https://git.rkrishnan.org/pf/content//%22?a=commitdiff_plain;h=324a72e4a358a58c2cd79e16a47f34095f87a5ea;p=tahoe-lafs%2Ftahoe-lafs.git Add more tests for comment:53 in ticket #778 --- diff --git a/src/allmydata/test/test_upload.py b/src/allmydata/test/test_upload.py index b58e6035..35c05461 100644 --- a/src/allmydata/test/test_upload.py +++ b/src/allmydata/test/test_upload.py @@ -719,29 +719,39 @@ class EncodingParameters(GridTestMixin, unittest.TestCase, SetDEPMixin, d.addCallback(_have_shareholders) return d - def _add_server_with_share(self, server_number, share_number=None, - readonly=False): + def _add_server(self, server_number, readonly=False): assert self.g, "I tried to find a grid at self.g, but failed" assert self.shares, "I tried to find shares at self.shares, but failed" ss = self.g.make_server(server_number, readonly) self.g.add_server(server_number, ss) + + def _add_server_with_share(self, server_number, share_number=None, + readonly=False): + self._add_server(server_number, readonly) if share_number: - # Copy share i from the directory associated with the first - # storage server to the directory associated with this one. - old_share_location = self.shares[share_number][2] - new_share_location = os.path.join(ss.storedir, "shares") - si = uri.from_string(self.uri).get_storage_index() - new_share_location = os.path.join(new_share_location, - storage_index_to_dir(si)) - if not os.path.exists(new_share_location): - os.makedirs(new_share_location) - new_share_location = os.path.join(new_share_location, - str(share_number)) - shutil.copy(old_share_location, new_share_location) - shares = self.find_shares(self.uri) - # Make sure that the storage server has the share. - self.failUnless((share_number, ss.my_nodeid, new_share_location) - in shares) + self._copy_share_to_server(share_number, server_number) + + def _copy_share_to_server(self, share_number, server_number): + ss = self.g.servers_by_number[server_number] + # Copy share i from the directory associated with the first + # storage server to the directory associated with this one. + assert self.g, "I tried to find a grid at self.g, but failed" + assert self.shares, "I tried to find shares at self.shares, but failed" + old_share_location = self.shares[share_number][2] + new_share_location = os.path.join(ss.storedir, "shares") + si = uri.from_string(self.uri).get_storage_index() + new_share_location = os.path.join(new_share_location, + storage_index_to_dir(si)) + if not os.path.exists(new_share_location): + os.makedirs(new_share_location) + new_share_location = os.path.join(new_share_location, + str(share_number)) + shutil.copy(old_share_location, new_share_location) + shares = self.find_shares(self.uri) + # Make sure that the storage server has the share. + self.failUnless((share_number, ss.my_nodeid, new_share_location) + in shares) + def _setup_and_upload(self): """ @@ -904,7 +914,7 @@ class EncodingParameters(GridTestMixin, unittest.TestCase, SetDEPMixin, d.addCallback(lambda ign: self._add_server_with_share(server_number=3, share_number=1)) # So, we now have the following layout: - # server 0: shares 1 - 10 + # server 0: shares 0 - 9 # server 1: share 0 # server 2: share 1 # server 3: share 2 @@ -921,6 +931,84 @@ class EncodingParameters(GridTestMixin, unittest.TestCase, SetDEPMixin, # instance already has a happy parameter set. d.addCallback(lambda client: client.upload(upload.Data("data" * 10000, convergence=""))) + + + # This scenario is basically comment:53, but with the order reversed; + # this means that the Tahoe2PeerSelector sees + # server 0: shares 1-10 + # server 1: share 1 + # server 2: share 2 + # server 3: share 3 + d.addCallback(_change_basedir) + d.addCallback(lambda ign: + self._setup_and_upload()) + d.addCallback(lambda ign: + self._add_server_with_share(server_number=2, share_number=0)) + d.addCallback(lambda ign: + self._add_server_with_share(server_number=3, share_number=1)) + d.addCallback(lambda ign: + self._add_server_with_share(server_number=1, share_number=2)) + # Copy all of the other shares to server number 2 + def _copy_shares(ign): + for i in xrange(1, 10): + self._copy_share_to_server(i, 2) + d.addCallback(_copy_shares) + # Remove the first server, and add a placeholder with share 0 + d.addCallback(lambda ign: + self.g.remove_server(self.g.servers_by_number[0].my_nodeid)) + d.addCallback(lambda ign: + self._add_server_with_share(server_number=0, share_number=0)) + # Now try uploading. + d.addCallback(_reset_encoding_parameters) + d.addCallback(lambda client: + client.upload(upload.Data("data" * 10000, convergence=""))) + # Try the same thing, but with empty servers after the first one + # We want to make sure that Tahoe2PeerSelector will redistribute + # shares as necessary, not simply discover an existing layout. + d.addCallback(_change_basedir) + d.addCallback(lambda ign: + self._setup_and_upload()) + d.addCallback(lambda ign: + self._add_server(server_number=2)) + d.addCallback(lambda ign: + self._add_server(server_number=3)) + d.addCallback(lambda ign: + self._add_server(server_number=1)) + d.addCallback(_copy_shares) + d.addCallback(lambda ign: + self.g.remove_server(self.g.servers_by_number[0].my_nodeid)) + d.addCallback(lambda ign: + self._add_server(server_number=0)) + d.addCallback(_reset_encoding_parameters) + d.addCallback(lambda client: + client.upload(upload.Data("data" * 10000, convergence=""))) + # Try the following layout + # server 0: shares 1-10 + # server 1: share 1, read-only + # server 2: share 2, read-only + # server 3: share 3, read-only + d.addCallback(_change_basedir) + d.addCallback(lambda ign: + self._setup_and_upload()) + d.addCallback(lambda ign: + self._add_server_with_share(server_number=2, share_number=0)) + d.addCallback(lambda ign: + self._add_server_with_share(server_number=3, share_number=1, + readonly=True)) + d.addCallback(lambda ign: + self._add_server_with_share(server_number=1, share_number=2, + readonly=True)) + # Copy all of the other shares to server number 2 + d.addCallback(_copy_shares) + # Remove server 0, and add another in its place + d.addCallback(lambda ign: + self.g.remove_server(self.g.servers_by_number[0].my_nodeid)) + d.addCallback(lambda ign: + self._add_server_with_share(server_number=0, share_number=0, + readonly=True)) + d.addCallback(_reset_encoding_parameters) + d.addCallback(lambda client: + client.upload(upload.Data("data" * 10000, convergence=""))) return d