Mercurial > hg
view tests/test-remotefilelog-datapack.py @ 40923:3ed77780f4a6
wireprotov2: send linknodes to emitfilerevisions()
Previously, linknodes were calculated within emitfilerevisions() by
using filectx.introrev(), which would always use the linkrev/linknode
as recorded by storage. This is wrong for cases where the receiver
doesn't have the changeset the linknode refers to.
This commit changes the logic for linknode emission so the mapping
of filenode to linknode is computed by the caller and passed into
emitfilerevisions().
As part of the change, linknodes for "filesdata" in the
haveparents=False case are now correct: the existing code performed a
manifest walk and it was trivial to plug in the correct linknode.
However, behavior for the haveparents=True case is still wrong
because it relies on filtering linkrevs against the outgoing set in
order to determine what to send. This will be fixed in a subsequent
commit.
The change test test-wireproto-exchangev2-shallow.t is a bit wonky.
The test repo has 6 revisions. The changed test is performing a shallow
clone with depth=1. So, only file data for revision 5 is present
locally. So, the new behavior of associating the linknode with
revision 5 for every file revision seems correct. Of course, when
backfilling old revisions, we'll want to update the linknode. But
this problem requires wire protocol support and we'll cross that
bridge later.
Differential Revision: https://phab.mercurial-scm.org/D5405
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Mon, 10 Dec 2018 18:04:12 +0000 |
parents | 10c10da14c5d |
children | 2888d12b80a6 |
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#!/usr/bin/env python from __future__ import absolute_import, print_function import hashlib import os import random import shutil import stat import struct import sys import tempfile import time import unittest import silenttestrunner # Load the local remotefilelog, not the system one sys.path[0:0] = [os.path.join(os.path.dirname(__file__), '..')] from mercurial.node import nullid from mercurial import ( ui as uimod, ) from hgext.remotefilelog import ( basepack, constants, datapack, ) class datapacktestsbase(object): def __init__(self, datapackreader, paramsavailable): self.datapackreader = datapackreader self.paramsavailable = paramsavailable def setUp(self): self.tempdirs = [] def tearDown(self): for d in self.tempdirs: shutil.rmtree(d) def makeTempDir(self): tempdir = tempfile.mkdtemp() self.tempdirs.append(tempdir) return tempdir def getHash(self, content): return hashlib.sha1(content).digest() def getFakeHash(self): return ''.join(chr(random.randint(0, 255)) for _ in range(20)) def createPack(self, revisions=None, packdir=None): if revisions is None: revisions = [("filename", self.getFakeHash(), nullid, "content")] if packdir is None: packdir = self.makeTempDir() packer = datapack.mutabledatapack(uimod.ui(), packdir, version=2) for args in revisions: filename, node, base, content = args[0:4] # meta is optional meta = None if len(args) > 4: meta = args[4] packer.add(filename, node, base, content, metadata=meta) path = packer.close() return self.datapackreader(path) def _testAddSingle(self, content): """Test putting a simple blob into a pack and reading it out. """ filename = "foo" node = self.getHash(content) revisions = [(filename, node, nullid, content)] pack = self.createPack(revisions) if self.paramsavailable: self.assertEquals(pack.params.fanoutprefix, basepack.SMALLFANOUTPREFIX) chain = pack.getdeltachain(filename, node) self.assertEquals(content, chain[0][4]) def testAddSingle(self): self._testAddSingle('') def testAddSingleEmpty(self): self._testAddSingle('abcdef') def testAddMultiple(self): """Test putting multiple unrelated blobs into a pack and reading them out. """ revisions = [] for i in range(10): filename = "foo%s" % i content = "abcdef%s" % i node = self.getHash(content) revisions.append((filename, node, self.getFakeHash(), content)) pack = self.createPack(revisions) for filename, node, base, content in revisions: entry = pack.getdelta(filename, node) self.assertEquals((content, filename, base, {}), entry) chain = pack.getdeltachain(filename, node) self.assertEquals(content, chain[0][4]) def testAddDeltas(self): """Test putting multiple delta blobs into a pack and read the chain. """ revisions = [] filename = "foo" lastnode = nullid for i in range(10): content = "abcdef%s" % i node = self.getHash(content) revisions.append((filename, node, lastnode, content)) lastnode = node pack = self.createPack(revisions) entry = pack.getdelta(filename, revisions[0][1]) realvalue = (revisions[0][3], filename, revisions[0][2], {}) self.assertEquals(entry, realvalue) # Test that the chain for the final entry has all the others chain = pack.getdeltachain(filename, node) for i in range(10): content = "abcdef%s" % i self.assertEquals(content, chain[-i - 1][4]) def testPackMany(self): """Pack many related and unrelated objects. """ # Build a random pack file revisions = [] blobs = {} random.seed(0) for i in range(100): filename = "filename-%s" % i filerevs = [] for j in range(random.randint(1, 100)): content = "content-%s" % j node = self.getHash(content) lastnode = nullid if len(filerevs) > 0: lastnode = filerevs[random.randint(0, len(filerevs) - 1)] filerevs.append(node) blobs[(filename, node, lastnode)] = content revisions.append((filename, node, lastnode, content)) pack = self.createPack(revisions) # Verify the pack contents for (filename, node, lastnode), content in sorted(blobs.iteritems()): chain = pack.getdeltachain(filename, node) for entry in chain: expectedcontent = blobs[(entry[0], entry[1], entry[3])] self.assertEquals(entry[4], expectedcontent) def testPackMetadata(self): revisions = [] for i in range(100): filename = '%s.txt' % i content = 'put-something-here \n' * i node = self.getHash(content) meta = {constants.METAKEYFLAG: i ** 4, constants.METAKEYSIZE: len(content), 'Z': 'random_string', '_': '\0' * i} revisions.append((filename, node, nullid, content, meta)) pack = self.createPack(revisions) for name, node, x, content, origmeta in revisions: parsedmeta = pack.getmeta(name, node) # flag == 0 should be optimized out if origmeta[constants.METAKEYFLAG] == 0: del origmeta[constants.METAKEYFLAG] self.assertEquals(parsedmeta, origmeta) def testGetMissing(self): """Test the getmissing() api. """ revisions = [] filename = "foo" lastnode = nullid for i in range(10): content = "abcdef%s" % i node = self.getHash(content) revisions.append((filename, node, lastnode, content)) lastnode = node pack = self.createPack(revisions) missing = pack.getmissing([("foo", revisions[0][1])]) self.assertFalse(missing) missing = pack.getmissing([("foo", revisions[0][1]), ("foo", revisions[1][1])]) self.assertFalse(missing) fakenode = self.getFakeHash() missing = pack.getmissing([("foo", revisions[0][1]), ("foo", fakenode)]) self.assertEquals(missing, [("foo", fakenode)]) def testAddThrows(self): pack = self.createPack() try: pack.add('filename', nullid, 'contents') self.assertTrue(False, "datapack.add should throw") except RuntimeError: pass def testBadVersionThrows(self): pack = self.createPack() path = pack.path + '.datapack' with open(path) as f: raw = f.read() raw = struct.pack('!B', 255) + raw[1:] os.chmod(path, os.stat(path).st_mode | stat.S_IWRITE) with open(path, 'w+') as f: f.write(raw) try: pack = self.datapackreader(pack.path) self.assertTrue(False, "bad version number should have thrown") except RuntimeError: pass def testMissingDeltabase(self): fakenode = self.getFakeHash() revisions = [("filename", fakenode, self.getFakeHash(), "content")] pack = self.createPack(revisions) chain = pack.getdeltachain("filename", fakenode) self.assertEquals(len(chain), 1) def testLargePack(self): """Test creating and reading from a large pack with over X entries. This causes it to use a 2^16 fanout table instead.""" revisions = [] blobs = {} total = basepack.SMALLFANOUTCUTOFF + 1 for i in xrange(total): filename = "filename-%s" % i content = filename node = self.getHash(content) blobs[(filename, node)] = content revisions.append((filename, node, nullid, content)) pack = self.createPack(revisions) if self.paramsavailable: self.assertEquals(pack.params.fanoutprefix, basepack.LARGEFANOUTPREFIX) for (filename, node), content in blobs.iteritems(): actualcontent = pack.getdeltachain(filename, node)[0][4] self.assertEquals(actualcontent, content) def testPacksCache(self): """Test that we remember the most recent packs while fetching the delta chain.""" packdir = self.makeTempDir() deltachains = [] numpacks = 10 revisionsperpack = 100 for i in range(numpacks): chain = [] revision = (str(i), self.getFakeHash(), nullid, "content") for _ in range(revisionsperpack): chain.append(revision) revision = ( str(i), self.getFakeHash(), revision[1], self.getFakeHash() ) self.createPack(chain, packdir) deltachains.append(chain) class testdatapackstore(datapack.datapackstore): # Ensures that we are not keeping everything in the cache. DEFAULTCACHESIZE = numpacks / 2 store = testdatapackstore(uimod.ui(), packdir) random.shuffle(deltachains) for randomchain in deltachains: revision = random.choice(randomchain) chain = store.getdeltachain(revision[0], revision[1]) mostrecentpack = next(iter(store.packs), None) self.assertEquals( mostrecentpack.getdeltachain(revision[0], revision[1]), chain ) self.assertEquals(randomchain.index(revision) + 1, len(chain)) # perf test off by default since it's slow def _testIndexPerf(self): random.seed(0) print("Multi-get perf test") packsizes = [ 100, 10000, 100000, 500000, 1000000, 3000000, ] lookupsizes = [ 10, 100, 1000, 10000, 100000, 1000000, ] for packsize in packsizes: revisions = [] for i in xrange(packsize): filename = "filename-%s" % i content = "content-%s" % i node = self.getHash(content) revisions.append((filename, node, nullid, content)) path = self.createPack(revisions).path # Perf of large multi-get import gc gc.disable() pack = self.datapackreader(path) for lookupsize in lookupsizes: if lookupsize > packsize: continue random.shuffle(revisions) findnodes = [(rev[0], rev[1]) for rev in revisions] start = time.time() pack.getmissing(findnodes[:lookupsize]) elapsed = time.time() - start print ("%s pack %s lookups = %0.04f" % (('%s' % packsize).rjust(7), ('%s' % lookupsize).rjust(7), elapsed)) print("") gc.enable() # The perf test is meant to produce output, so we always fail the test # so the user sees the output. raise RuntimeError("perf test always fails") class datapacktests(datapacktestsbase, unittest.TestCase): def __init__(self, *args, **kwargs): datapacktestsbase.__init__(self, datapack.datapack, True) unittest.TestCase.__init__(self, *args, **kwargs) # TODO: # datapack store: # - getmissing # - GC two packs into one if __name__ == '__main__': silenttestrunner.main(__name__)