From: Brian Warner Date: Mon, 1 Aug 2011 17:44:44 +0000 (-0700) Subject: test_immutable.Test: rewrite to use NoNetworkGrid, now takes 2.7s not 97s X-Git-Url: https://git.rkrishnan.org/pf/content/en/seg/vdrive?a=commitdiff_plain;h=0605c77f08fb4b78b0e0e1d23c1650685fcc88b8;p=tahoe-lafs%2Ftahoe-lafs.git test_immutable.Test: rewrite to use NoNetworkGrid, now takes 2.7s not 97s remove now-unused ShareManglingMixin refs #1363 --- diff --git a/src/allmydata/test/common.py b/src/allmydata/test/common.py index dfcaa100..d68e50af 100644 --- a/src/allmydata/test/common.py +++ b/src/allmydata/test/common.py @@ -14,11 +14,9 @@ from allmydata.check_results import CheckResults, CheckAndRepairResults, \ DeepCheckResults, DeepCheckAndRepairResults from allmydata.mutable.common import CorruptShareError from allmydata.mutable.layout import unpack_header -from allmydata.storage.server import storage_index_to_dir from allmydata.storage.mutable import MutableShareFile from allmydata.util import hashutil, log, fileutil, pollmixin from allmydata.util.assertutil import precondition -from allmydata.util.consumer import download_to_data from allmydata.stats import StatsGathererService from allmydata.key_generator import KeyGeneratorService import allmydata.test.common_util as testutil @@ -917,152 +915,6 @@ N8L+bvLd4BU9g6hRS8b59lQ6GNjryx2bUnCVtLcey4Jd TEST_DATA="\x02"*(immutable.upload.Uploader.URI_LIT_SIZE_THRESHOLD+1) -class ShareManglingMixin(SystemTestMixin): - - def setUp(self): - # Set self.basedir to a temp dir which has the name of the current - # test method in its name. - self.basedir = self.mktemp() - - d = defer.maybeDeferred(SystemTestMixin.setUp, self) - d.addCallback(lambda x: self.set_up_nodes()) - - def _upload_a_file(ignored): - cl0 = self.clients[0] - # We need multiple segments to test crypttext hash trees that are - # non-trivial (i.e. they have more than just one hash in them). - cl0.DEFAULT_ENCODING_PARAMETERS['max_segment_size'] = 12 - # Tests that need to test servers of happiness using this should - # set their own value for happy -- the default (7) breaks stuff. - cl0.DEFAULT_ENCODING_PARAMETERS['happy'] = 1 - d2 = cl0.upload(immutable.upload.Data(TEST_DATA, convergence="")) - def _after_upload(u): - filecap = u.uri - self.n = self.clients[1].create_node_from_uri(filecap) - self.uri = uri.CHKFileURI.init_from_string(filecap) - return cl0.create_node_from_uri(filecap) - d2.addCallback(_after_upload) - return d2 - d.addCallback(_upload_a_file) - - def _stash_it(filenode): - self.filenode = filenode - d.addCallback(_stash_it) - return d - - def find_all_shares(self, unused=None): - """Locate shares on disk. Returns a dict that maps - (clientnum,sharenum) to a string that contains the share container - (copied directly from the disk, containing leases etc). You can - modify this dict and then call replace_shares() to modify the shares. - """ - shares = {} # k: (i, sharenum), v: data - - for i, c in enumerate(self.clients): - sharedir = c.getServiceNamed("storage").sharedir - for (dirp, dirns, fns) in os.walk(sharedir): - for fn in fns: - try: - sharenum = int(fn) - except TypeError: - # Whoops, I guess that's not a share file then. - pass - else: - data = open(os.path.join(sharedir, dirp, fn), "rb").read() - shares[(i, sharenum)] = data - - return shares - - def replace_shares(self, newshares, storage_index): - """Replace shares on disk. Takes a dictionary in the same form - as find_all_shares() returns.""" - - for i, c in enumerate(self.clients): - sharedir = c.getServiceNamed("storage").sharedir - for (dirp, dirns, fns) in os.walk(sharedir): - for fn in fns: - try: - sharenum = int(fn) - except TypeError: - # Whoops, I guess that's not a share file then. - pass - else: - pathtosharefile = os.path.join(sharedir, dirp, fn) - os.unlink(pathtosharefile) - for ((clientnum, sharenum), newdata) in newshares.iteritems(): - if clientnum == i: - fullsharedirp=os.path.join(sharedir, storage_index_to_dir(storage_index)) - fileutil.make_dirs(fullsharedirp) - wf = open(os.path.join(fullsharedirp, str(sharenum)), "wb") - wf.write(newdata) - wf.close() - - def _delete_a_share(self, unused=None, sharenum=None): - """ Delete one share. """ - - shares = self.find_all_shares() - ks = shares.keys() - if sharenum is not None: - k = [ key for key in shares.keys() if key[1] == sharenum ][0] - else: - k = random.choice(ks) - del shares[k] - self.replace_shares(shares, storage_index=self.uri.get_storage_index()) - - return unused - - def _corrupt_a_share(self, unused, corruptor_func, sharenum): - shares = self.find_all_shares() - ks = [ key for key in shares.keys() if key[1] == sharenum ] - assert ks, (shares.keys(), sharenum) - k = ks[0] - shares[k] = corruptor_func(shares[k]) - self.replace_shares(shares, storage_index=self.uri.get_storage_index()) - return corruptor_func - - def _corrupt_all_shares(self, unused, corruptor_func): - """ All shares on disk will be corrupted by corruptor_func. """ - shares = self.find_all_shares() - for k in shares.keys(): - self._corrupt_a_share(unused, corruptor_func, k[1]) - return corruptor_func - - def _corrupt_a_random_share(self, unused, corruptor_func): - """ Exactly one share on disk will be corrupted by corruptor_func. """ - shares = self.find_all_shares() - ks = shares.keys() - k = random.choice(ks) - self._corrupt_a_share(unused, corruptor_func, k[1]) - return k[1] - - def _count_reads(self): - sum_of_read_counts = 0 - for thisclient in self.clients: - counters = thisclient.stats_provider.get_stats()['counters'] - sum_of_read_counts += counters.get('storage_server.read', 0) - return sum_of_read_counts - - def _count_allocates(self): - sum_of_allocate_counts = 0 - for thisclient in self.clients: - counters = thisclient.stats_provider.get_stats()['counters'] - sum_of_allocate_counts += counters.get('storage_server.allocate', 0) - return sum_of_allocate_counts - - def _count_writes(self): - sum_of_write_counts = 0 - for thisclient in self.clients: - counters = thisclient.stats_provider.get_stats()['counters'] - sum_of_write_counts += counters.get('storage_server.write', 0) - return sum_of_write_counts - - def _download_and_check_plaintext(self, unused=None): - d = download_to_data(self.n) - def _after_download(result): - self.failUnlessEqual(result, TEST_DATA) - d.addCallback(_after_download) - return d - class ShouldFailMixin: def shouldFail(self, expected_failure, which, substring, callable, *args, **kwargs): diff --git a/src/allmydata/test/test_immutable.py b/src/allmydata/test/test_immutable.py index beb62698..b7aa6f65 100644 --- a/src/allmydata/test/test_immutable.py +++ b/src/allmydata/test/test_immutable.py @@ -1,18 +1,21 @@ -from allmydata.test import common -from allmydata.interfaces import NotEnoughSharesError -from allmydata.util.consumer import download_to_data -from allmydata import uri -from twisted.internet import defer -from twisted.trial import unittest import random +from twisted.trial import unittest +from twisted.internet import defer +import mock from foolscap.api import eventually + +from allmydata.test import common +from allmydata.test.no_network import GridTestMixin +from allmydata.test.common import TEST_DATA +from allmydata import uri from allmydata.util import log +from allmydata.util.consumer import download_to_data +from allmydata.interfaces import NotEnoughSharesError +from allmydata.immutable.upload import Data from allmydata.immutable.downloader import finder -import mock - class MockNode(object): def __init__(self, check_reneging, check_fetch_failed): self.got = 0 @@ -129,41 +132,76 @@ class TestShareFinder(unittest.TestCase): return mocknode.when_finished() -class Test(common.ShareManglingMixin, common.ShouldFailMixin, unittest.TestCase): + +class Test(GridTestMixin, unittest.TestCase, common.ShouldFailMixin): + def startup(self, basedir): + self.basedir = basedir + self.set_up_grid(num_clients=2, num_servers=5) + c1 = self.g.clients[1] + # We need multiple segments to test crypttext hash trees that are + # non-trivial (i.e. they have more than just one hash in them). + c1.DEFAULT_ENCODING_PARAMETERS['max_segment_size'] = 12 + # Tests that need to test servers of happiness using this should + # set their own value for happy -- the default (7) breaks stuff. + c1.DEFAULT_ENCODING_PARAMETERS['happy'] = 1 + d = c1.upload(Data(TEST_DATA, convergence="")) + def _after_upload(ur): + self.uri = ur.uri + self.filenode = self.g.clients[0].create_node_from_uri(ur.uri) + return self.uri + d.addCallback(_after_upload) + return d + + def _stash_shares(self, shares): + self.shares = shares + + def _download_and_check_plaintext(self, ign=None): + num_reads = self._count_reads() + d = download_to_data(self.filenode) + def _after_download(result): + self.failUnlessEqual(result, TEST_DATA) + return self._count_reads() - num_reads + d.addCallback(_after_download) + return d + + def _shuffled(self, num_shnums): + shnums = range(10) + random.shuffle(shnums) + return shnums[:num_shnums] + + def _count_reads(self): + return sum([s.stats_provider.get_stats() ['counters'].get('storage_server.read', 0) + for s in self.g.servers_by_number.values()]) + + + def _count_allocates(self): + return sum([s.stats_provider.get_stats() ['counters'].get('storage_server.allocate', 0) + for s in self.g.servers_by_number.values()]) + + def _count_writes(self): + return sum([s.stats_provider.get_stats() ['counters'].get('storage_server.write', 0) + for s in self.g.servers_by_number.values()]) + def test_test_code(self): # The following process of stashing the shares, running # replace_shares, and asserting that the new set of shares equals the # old is more to test this test code than to test the Tahoe code... - d = defer.succeed(None) - d.addCallback(self.find_all_shares) - stash = [None] - def _stash_it(res): - stash[0] = res - return res - d.addCallback(_stash_it) + d = self.startup("immutable/Test/code") + d.addCallback(self.copy_shares) + d.addCallback(self._stash_shares) + d.addCallback(self._download_and_check_plaintext) # The following process of deleting 8 of the shares and asserting # that you can't download it is more to test this test code than to # test the Tahoe code... - def _then_delete_8(unused=None): - self.replace_shares(stash[0], storage_index=self.uri.get_storage_index()) - for i in range(8): - self._delete_a_share() + def _then_delete_8(ign): + self.restore_all_shares(self.shares) + self.delete_shares_numbered(self.uri, range(8)) d.addCallback(_then_delete_8) - - def _then_download(unused=None): - d2 = download_to_data(self.n) - - def _after_download_callb(result): - self.fail() # should have gotten an errback instead - return result - def _after_download_errb(failure): - failure.trap(NotEnoughSharesError) - return None # success! - d2.addCallbacks(_after_download_callb, _after_download_errb) - return d2 - d.addCallback(_then_download) - + d.addCallback(lambda ign: + self.shouldFail(NotEnoughSharesError, "download-2", + "ran out of shares", + download_to_data, self.filenode)) return d def test_download(self): @@ -171,55 +209,49 @@ class Test(common.ShareManglingMixin, common.ShouldFailMixin, unittest.TestCase) tested by test code in other modules, but this module is also going to test some more specific things about immutable download.) """ - d = defer.succeed(None) - before_download_reads = self._count_reads() - def _after_download(unused=None): - after_download_reads = self._count_reads() - #print before_download_reads, after_download_reads - self.failIf(after_download_reads-before_download_reads > 41, - (after_download_reads, before_download_reads)) + d = self.startup("immutable/Test/download") d.addCallback(self._download_and_check_plaintext) + def _after_download(ign): + num_reads = self._count_reads() + #print num_reads + self.failIf(num_reads > 41, num_reads) d.addCallback(_after_download) return d def test_download_from_only_3_remaining_shares(self): """ Test download after 7 random shares (of the 10) have been removed.""" - d = defer.succeed(None) - def _then_delete_7(unused=None): - for i in range(7): - self._delete_a_share() - before_download_reads = self._count_reads() - d.addCallback(_then_delete_7) - def _after_download(unused=None): - after_download_reads = self._count_reads() - #print before_download_reads, after_download_reads - self.failIf(after_download_reads-before_download_reads > 41, (after_download_reads, before_download_reads)) + d = self.startup("immutable/Test/download_from_only_3_remaining_shares") + d.addCallback(lambda ign: + self.delete_shares_numbered(self.uri, range(7))) d.addCallback(self._download_and_check_plaintext) + def _after_download(num_reads): + #print num_reads + self.failIf(num_reads > 41, num_reads) d.addCallback(_after_download) return d def test_download_from_only_3_shares_with_good_crypttext_hash(self): """ Test download after 7 random shares (of the 10) have had their crypttext hash tree corrupted.""" - d = defer.succeed(None) - def _then_corrupt_7(unused=None): - shnums = range(10) - random.shuffle(shnums) - for i in shnums[:7]: - self._corrupt_a_share(None, common._corrupt_offset_of_block_hashes_to_truncate_crypttext_hashes, i) - #before_download_reads = self._count_reads() - d.addCallback(_then_corrupt_7) + d = self.startup("download_from_only_3_shares_with_good_crypttext_hash") + def _corrupt_7(ign): + c = common._corrupt_offset_of_block_hashes_to_truncate_crypttext_hashes + self.corrupt_shares_numbered(self.uri, self._shuffled(7), c) + d.addCallback(_corrupt_7) d.addCallback(self._download_and_check_plaintext) return d def test_download_abort_if_too_many_missing_shares(self): """ Test that download gives up quickly when it realizes there aren't enough shares out there.""" - for i in range(8): - self._delete_a_share() - d = self.shouldFail(NotEnoughSharesError, "delete 8", None, - download_to_data, self.n) + d = self.startup("download_abort_if_too_many_missing_shares") + d.addCallback(lambda ign: + self.delete_shares_numbered(self.uri, range(8))) + d.addCallback(lambda ign: + self.shouldFail(NotEnoughSharesError, "delete 8", + "Last failure: None", + download_to_data, self.filenode)) # the new downloader pipelines a bunch of read requests in parallel, # so don't bother asserting anything about the number of reads return d @@ -229,39 +261,30 @@ class Test(common.ShareManglingMixin, common.ShouldFailMixin, unittest.TestCase) enough uncorrupted shares out there. It should be able to tell because the corruption occurs in the sharedata version number, which it checks first.""" - d = defer.succeed(None) - def _then_corrupt_8(unused=None): - shnums = range(10) - random.shuffle(shnums) - for shnum in shnums[:8]: - self._corrupt_a_share(None, common._corrupt_sharedata_version_number, shnum) - d.addCallback(_then_corrupt_8) - - before_download_reads = self._count_reads() - def _attempt_to_download(unused=None): - d2 = download_to_data(self.n) - - def _callb(res): - self.fail("Should have gotten an error from attempt to download, not %r" % (res,)) - def _errb(f): - self.failUnless(f.check(NotEnoughSharesError)) - d2.addCallbacks(_callb, _errb) + d = self.startup("download_abort_if_too_many_corrupted_shares") + def _corrupt_8(ign): + c = common._corrupt_sharedata_version_number + self.corrupt_shares_numbered(self.uri, self._shuffled(8), c) + d.addCallback(_corrupt_8) + def _try_download(ign): + start_reads = self._count_reads() + d2 = self.shouldFail(NotEnoughSharesError, "corrupt 8", + "LayoutInvalid", + download_to_data, self.filenode) + def _check_numreads(ign): + num_reads = self._count_reads() - start_reads + #print num_reads + + # To pass this test, you are required to give up before + # reading all of the share data. Actually, we could give up + # sooner than 45 reads, but currently our download code does + # 45 reads. This test then serves as a "performance + # regression detector" -- if you change download code so that + # it takes *more* reads, then this test will fail. + self.failIf(num_reads > 45, num_reads) + d2.addCallback(_check_numreads) return d2 - - d.addCallback(_attempt_to_download) - - def _after_attempt(unused=None): - after_download_reads = self._count_reads() - #print before_download_reads, after_download_reads - # To pass this test, you are required to give up before reading - # all of the share data. Actually, we could give up sooner than - # 45 reads, but currently our download code does 45 reads. This - # test then serves as a "performance regression detector" -- if - # you change download code so that it takes *more* reads, then - # this test will fail. - self.failIf(after_download_reads-before_download_reads > 45, - (after_download_reads, before_download_reads)) - d.addCallback(_after_attempt) + d.addCallback(_try_download) return d