Exemplo n.º 1
0
// TestUpdateRangeAddressingSplitMeta1 verifies that it's an error to
// attempt to update range addressing records that would allow a split
// of meta1 records.
func TestUpdateRangeAddressingSplitMeta1(t *testing.T) {
	store := createTestStore(t)
	left := &proto.RangeDescriptor{StartKey: engine.KeyMin, EndKey: meta1Key(proto.Key("a"))}
	right := &proto.RangeDescriptor{StartKey: meta1Key(proto.Key("a")), EndKey: engine.KeyMax}
	if err := storage.SplitRangeAddressing(store.DB(), left, right); err == nil {
		t.Error("expected failure trying to update addressing records for meta1 split")
	}
}
Exemplo n.º 2
0
// TestUpdateRangeAddressing verifies range addressing records are
// correctly updated on creation of new range descriptors.
func TestUpdateRangeAddressing(t *testing.T) {
	store := createTestStore(t)
	// When split is false, merging treats the right range as the merged
	// range. With merging, expNewLeft indicates the addressing keys we
	// expect to be removed.
	testCases := []struct {
		split                   bool
		leftStart, leftEnd      proto.Key
		rightStart, rightEnd    proto.Key
		leftExpNew, rightExpNew []proto.Key
	}{
		// Start out with whole range.
		{false, engine.KeyMin, engine.KeyMax, engine.KeyMin, engine.KeyMax,
			[]proto.Key{}, []proto.Key{meta1Key(engine.KeyMax), meta2Key(engine.KeyMax)}},
		// Split KeyMin-KeyMax at key "a".
		{true, engine.KeyMin, proto.Key("a"), proto.Key("a"), engine.KeyMax,
			[]proto.Key{meta1Key(engine.KeyMax), meta2Key(proto.Key("a"))}, []proto.Key{meta2Key(engine.KeyMax)}},
		// Split "a"-KeyMax at key "z".
		{true, proto.Key("a"), proto.Key("z"), proto.Key("z"), engine.KeyMax,
			[]proto.Key{meta2Key(proto.Key("z"))}, []proto.Key{meta2Key(engine.KeyMax)}},
		// Split "a"-"z" at key "m".
		{true, proto.Key("a"), proto.Key("m"), proto.Key("m"), proto.Key("z"),
			[]proto.Key{meta2Key(proto.Key("m"))}, []proto.Key{meta2Key(proto.Key("z"))}},
		// Split KeyMin-"a" at meta2(m).
		{true, engine.KeyMin, engine.RangeMetaKey(proto.Key("m")), engine.RangeMetaKey(proto.Key("m")), proto.Key("a"),
			[]proto.Key{meta1Key(proto.Key("m"))}, []proto.Key{meta1Key(engine.KeyMax), meta2Key(proto.Key("a"))}},
		// Split meta2(m)-"a" at meta2(z).
		{true, engine.RangeMetaKey(proto.Key("m")), engine.RangeMetaKey(proto.Key("z")), engine.RangeMetaKey(proto.Key("z")), proto.Key("a"),
			[]proto.Key{meta1Key(proto.Key("z"))}, []proto.Key{meta1Key(engine.KeyMax), meta2Key(proto.Key("a"))}},
		// Split meta2(m)-meta2(z) at meta2(r).
		{true, engine.RangeMetaKey(proto.Key("m")), engine.RangeMetaKey(proto.Key("r")), engine.RangeMetaKey(proto.Key("r")), engine.RangeMetaKey(proto.Key("z")),
			[]proto.Key{meta1Key(proto.Key("r"))}, []proto.Key{meta1Key(proto.Key("z"))}},

		// Now, merge all of our splits backwards...

		// Merge meta2(m)-meta2(z).
		{false, engine.RangeMetaKey(proto.Key("m")), engine.RangeMetaKey(proto.Key("r")), engine.RangeMetaKey(proto.Key("m")), engine.RangeMetaKey(proto.Key("z")),
			[]proto.Key{meta1Key(proto.Key("r"))}, []proto.Key{meta1Key(proto.Key("z"))}},
		// Merge meta2(m)-"a".
		{false, engine.RangeMetaKey(proto.Key("m")), engine.RangeMetaKey(proto.Key("z")), engine.RangeMetaKey(proto.Key("m")), proto.Key("a"),
			[]proto.Key{meta1Key(proto.Key("z"))}, []proto.Key{meta1Key(engine.KeyMax), meta2Key(proto.Key("a"))}},
		// Merge KeyMin-"a".
		{false, engine.KeyMin, engine.RangeMetaKey(proto.Key("m")), engine.KeyMin, proto.Key("a"),
			[]proto.Key{meta1Key(proto.Key("m"))}, []proto.Key{meta1Key(engine.KeyMax), meta2Key(proto.Key("a"))}},
		// Merge "a"-"z".
		{false, proto.Key("a"), proto.Key("m"), proto.Key("a"), proto.Key("z"),
			[]proto.Key{meta2Key(proto.Key("m"))}, []proto.Key{meta2Key(proto.Key("z"))}},
		// Merge "a"-KeyMax.
		{false, proto.Key("a"), proto.Key("z"), proto.Key("a"), engine.KeyMax,
			[]proto.Key{meta2Key(proto.Key("z"))}, []proto.Key{meta2Key(engine.KeyMax)}},
		// Merge KeyMin-KeyMax.
		{false, engine.KeyMin, proto.Key("a"), engine.KeyMin, engine.KeyMax,
			[]proto.Key{meta2Key(proto.Key("a"))}, []proto.Key{meta1Key(engine.KeyMax), meta2Key(engine.KeyMax)}},
	}
	expMetas := metaSlice{}

	for i, test := range testCases {
		left := &proto.RangeDescriptor{RaftID: int64(i * 2), StartKey: test.leftStart, EndKey: test.leftEnd}
		right := &proto.RangeDescriptor{RaftID: int64(i*2 + 1), StartKey: test.rightStart, EndKey: test.rightEnd}
		if test.split {
			if err := storage.SplitRangeAddressing(store.DB(), left, right); err != nil {
				t.Fatal(err)
			}
		} else {
			if err := storage.MergeRangeAddressing(store.DB(), left, right); err != nil {
				t.Fatal(err)
			}
		}
		store.DB().Flush()
		// Scan meta keys directly from engine.
		kvs, err := engine.MVCCScan(store.Engine(), engine.KeyMetaPrefix, engine.KeyMetaMax, 0, proto.MaxTimestamp, nil)
		if err != nil {
			t.Fatal(err)
		}
		metas := metaSlice{}
		for _, kv := range kvs {
			scannedDesc := &proto.RangeDescriptor{}
			if err := gogoproto.Unmarshal(kv.Value.Bytes, scannedDesc); err != nil {
				t.Fatal(err)
			}
			metas = append(metas, metaRecord{key: kv.Key, desc: scannedDesc})
		}

		// Continue to build up the expected metas slice, replacing any earlier
		// version of same key.
		addOrRemoveNew := func(keys []proto.Key, desc *proto.RangeDescriptor, add bool) {
			for _, n := range keys {
				found := -1
				for i := range expMetas {
					if expMetas[i].key.Equal(n) {
						found = i
						expMetas[i].desc = desc
						break
					}
				}
				if found == -1 && add {
					expMetas = append(expMetas, metaRecord{key: n, desc: desc})
				} else if found != -1 && !add {
					expMetas = append(expMetas[:found], expMetas[found+1:]...)
				}
			}
		}
		addOrRemoveNew(test.leftExpNew, left, test.split /* on split, add; on merge, remove */)
		addOrRemoveNew(test.rightExpNew, right, true)
		sort.Sort(expMetas)

		if test.split {
			log.V(1).Infof("test case %d: split %q-%q at %q", i, left.StartKey, right.EndKey, left.EndKey)
		} else {
			log.V(1).Infof("test case %d: merge %q-%q + %q-%q", i, left.StartKey, left.EndKey, left.EndKey, right.EndKey)
		}
		for _, meta := range metas {
			log.V(1).Infof("%q", meta.key)
		}
		log.V(1).Infof("")

		if !reflect.DeepEqual(expMetas, metas) {
			t.Errorf("expected metas don't match")
			if len(expMetas) != len(metas) {
				t.Errorf("len(expMetas) != len(metas); %d != %d", len(expMetas), len(metas))
			} else {
				for i, meta := range expMetas {
					if !meta.key.Equal(metas[i].key) {
						fmt.Printf("%d: expected %q vs %q\n", i, meta.key, metas[i].key)
					}
					if !reflect.DeepEqual(meta.desc, metas[i].desc) {
						fmt.Printf("%d: expected %q vs %q and %s vs %s\n", i, meta.key, metas[i].key, meta.desc, metas[i].desc)
					}
				}
			}
		}
	}
}