// This function implements the restriction of handling one keyrange
// and one shard since streaming doesn't support merge sorting the results.
// The input/output api is generic though.
func (vtg *VTGate) mapKrToShardsForStreaming(streamQuery *proto.StreamQueryKeyRange) ([]string, error) {
var keyRange key.KeyRange
var err error
if streamQuery.KeyRange == "" {
keyRange = key.KeyRange{Start: "", End: ""}
} else {
krArray, err := key.ParseShardingSpec(streamQuery.KeyRange)
if err != nil {
return nil, err
}
keyRange = krArray[0]
}
shards, err := resolveKeyRangeToShards(vtg.scatterConn.toposerv,
vtg.scatterConn.cell,
streamQuery.Keyspace,
streamQuery.TabletType,
keyRange)
if err != nil {
return nil, err
}
if len(shards) != 1 {
return nil, fmt.Errorf("KeyRange cannot map to more than one shard")
}
return shards, nil
}
func getAllShards(shardSpec string) (key.KeyRangeArray, error) {
shardedKrArray, err := key.ParseShardingSpec(shardSpec)
if err != nil {
return nil, err
}
return shardedKrArray, nil
}
func multisnapshotCmd(mysqld *mysqlctl.Mysqld, subFlags *flag.FlagSet, args []string) {
concurrency := subFlags.Int("concurrency", 8, "how many compression jobs to run simultaneously")
spec := subFlags.String("spec", "-", "shard specification")
tablesString := subFlags.String("tables", "", "dump only this comma separated list of tables")
skipSlaveRestart := subFlags.Bool("skip-slave-restart", false, "after the snapshot is done, do not restart slave replication")
maximumFilesize := subFlags.Uint64("maximum-file-size", 128*1024*1024, "the maximum size for an uncompressed data file")
subFlags.Parse(args)
if subFlags.NArg() != 2 {
relog.Fatal("action multisnapshot requires <db name> <key name>")
}
shards, err := key.ParseShardingSpec(*spec)
if err != nil {
relog.Fatal("multisnapshot failed: %v", err)
}
var tables []string
if *tablesString != "" {
tables = strings.Split(*tablesString, ",")
}
filenames, err := mysqld.CreateMultiSnapshot(shards, subFlags.Arg(0), subFlags.Arg(1), tabletAddr, false, *concurrency, tables, *skipSlaveRestart, *maximumFilesize, nil)
if err != nil {
relog.Fatal("multisnapshot failed: %v", err)
} else {
relog.Info("manifest locations: %v", filenames)
}
}
func TestVTGateSplitQuery(t *testing.T) {
keyspace := "TestVTGateSplitQuery"
keyranges, _ := key.ParseShardingSpec(DefaultShardSpec)
createSandbox(keyspace)
hcVTGateTest.Reset()
port := int32(1001)
for _, kr := range keyranges {
hcVTGateTest.AddTestTablet("aa", "1.1.1.1", port, keyspace, key.KeyRangeString(kr), topodatapb.TabletType_RDONLY, true, 1, nil)
port++
}
sql := "select col1, col2 from table"
splitCount := 24
splits, err := rpcVTGate.SplitQuery(context.Background(),
keyspace,
sql,
nil,
"",
int64(splitCount))
if err != nil {
t.Errorf("want nil, got %v", err)
}
_, err = getAllShards(DefaultShardSpec)
// Total number of splits should be number of shards * splitsPerShard
if splitCount != len(splits) {
t.Errorf("wrong number of splits, want \n%+v, got \n%+v", splitCount, len(splits))
}
actualSqlsByKeyRange := map[string][]string{}
for _, split := range splits {
if split.Size != sandboxconn.SandboxSQRowCount {
t.Errorf("wrong split size, want \n%+v, got \n%+v", sandboxconn.SandboxSQRowCount, split.Size)
}
if split.KeyRangePart.Keyspace != keyspace {
t.Errorf("wrong keyspace, want \n%+v, got \n%+v", keyspace, split.KeyRangePart.Keyspace)
}
if len(split.KeyRangePart.KeyRanges) != 1 {
t.Errorf("wrong number of keyranges, want \n%+v, got \n%+v", 1, len(split.KeyRangePart.KeyRanges))
}
kr := key.KeyRangeString(split.KeyRangePart.KeyRanges[0])
actualSqlsByKeyRange[kr] = append(actualSqlsByKeyRange[kr], split.Query.Sql)
}
// Sort the sqls for each KeyRange so that we can compare them without
// regard to the order in which they were returned by the vtgate.
for _, sqlsForKeyRange := range actualSqlsByKeyRange {
sort.Strings(sqlsForKeyRange)
}
expectedSqlsByKeyRange := map[string][]string{}
for _, kr := range keyranges {
expectedSqlsByKeyRange[key.KeyRangeString(kr)] = []string{
"select col1, col2 from table /*split 0 */",
"select col1, col2 from table /*split 1 */",
"select col1, col2 from table /*split 2 */",
}
}
if !reflect.DeepEqual(actualSqlsByKeyRange, expectedSqlsByKeyRange) {
t.Errorf("splits contain the wrong sqls and/or keyranges, got: %v, want: %v", actualSqlsByKeyRange, expectedSqlsByKeyRange)
}
}
func getAllShards() (key.KeyRangeArray, error) {
if ShardedKrArray != nil {
return ShardedKrArray, nil
}
shardedKrArray, err := key.ParseShardingSpec(ShardSpec)
if err != nil {
return nil, err
}
return shardedKrArray, nil
}
func TestVTGateSplitQuery(t *testing.T) {
keyspace := "TestVTGateSplitQuery"
keyranges, _ := key.ParseShardingSpec(DefaultShardSpec)
s := createSandbox(keyspace)
for _, kr := range keyranges {
s.MapTestConn(fmt.Sprintf("%s-%s", kr.Start, kr.End), &sandboxConn{})
}
sql := "select col1, col2 from table"
splitCount := 24
req := proto.SplitQueryRequest{
Keyspace: keyspace,
Query: tproto.BoundQuery{
Sql: sql,
},
SplitCount: splitCount,
}
result := new(proto.SplitQueryResult)
err := rpcVTGate.SplitQuery(context.Background(), &req, result)
if err != nil {
t.Errorf("want nil, got %v", err)
}
_, err = getAllShards(DefaultShardSpec)
// Total number of splits should be number of shards * splitsPerShard
if splitCount != len(result.Splits) {
t.Errorf("wrong number of splits, want \n%+v, got \n%+v", splitCount, len(result.Splits))
}
actualSqlsByKeyRange := map[kproto.KeyRange][]string{}
for _, split := range result.Splits {
if split.Size != sandboxSQRowCount {
t.Errorf("wrong split size, want \n%+v, got \n%+v", sandboxSQRowCount, split.Size)
}
if split.Query.Keyspace != keyspace {
t.Errorf("wrong split size, want \n%+v, got \n%+v", keyspace, split.Query.Keyspace)
}
if len(split.Query.KeyRanges) != 1 {
t.Errorf("wrong number of keyranges, want \n%+v, got \n%+v", 1, len(split.Query.KeyRanges))
}
if split.Query.TabletType != topo.TYPE_RDONLY {
t.Errorf("wrong tablet type, want \n%+v, got \n%+v", topo.TYPE_RDONLY, split.Query.TabletType)
}
kr := split.Query.KeyRanges[0]
actualSqlsByKeyRange[kr] = append(actualSqlsByKeyRange[kr], split.Query.Sql)
}
expectedSqlsByKeyRange := map[kproto.KeyRange][]string{}
for _, kr := range keyranges {
expectedSqlsByKeyRange[kr] = []string{
"select col1, col2 from table /*split 0 */",
"select col1, col2 from table /*split 1 */",
"select col1, col2 from table /*split 2 */",
}
}
if !reflect.DeepEqual(actualSqlsByKeyRange, expectedSqlsByKeyRange) {
t.Errorf("splits contain the wrong sqls and/or keyranges, got: %v, want: %v", actualSqlsByKeyRange, expectedSqlsByKeyRange)
}
}
func TestVTGateSplitQuery(t *testing.T) {
keyspace := "TestVTGateSplitQuery"
keyranges, _ := key.ParseShardingSpec(DefaultShardSpec)
s := createSandbox(keyspace)
for _, kr := range keyranges {
s.MapTestConn(key.KeyRangeString(kr), &sandboxConn{})
}
sql := "select col1, col2 from table"
splitCount := 24
splits, err := rpcVTGate.SplitQuery(context.Background(),
keyspace,
sql,
nil,
"",
splitCount)
if err != nil {
t.Errorf("want nil, got %v", err)
}
_, err = getAllShards(DefaultShardSpec)
// Total number of splits should be number of shards * splitsPerShard
if splitCount != len(splits) {
t.Errorf("wrong number of splits, want \n%+v, got \n%+v", splitCount, len(splits))
}
actualSqlsByKeyRange := map[string][]string{}
for _, split := range splits {
if split.Size != sandboxSQRowCount {
t.Errorf("wrong split size, want \n%+v, got \n%+v", sandboxSQRowCount, split.Size)
}
if split.KeyRangePart.Keyspace != keyspace {
t.Errorf("wrong split size, want \n%+v, got \n%+v", keyspace, split.KeyRangePart.Keyspace)
}
if len(split.KeyRangePart.KeyRanges) != 1 {
t.Errorf("wrong number of keyranges, want \n%+v, got \n%+v", 1, len(split.KeyRangePart.KeyRanges))
}
kr := key.KeyRangeString(split.KeyRangePart.KeyRanges[0])
actualSqlsByKeyRange[kr] = append(actualSqlsByKeyRange[kr], split.Query.Sql)
}
expectedSqlsByKeyRange := map[string][]string{}
for _, kr := range keyranges {
expectedSqlsByKeyRange[key.KeyRangeString(kr)] = []string{
"select col1, col2 from table /*split 0 */",
"select col1, col2 from table /*split 1 */",
"select col1, col2 from table /*split 2 */",
}
}
if !reflect.DeepEqual(actualSqlsByKeyRange, expectedSqlsByKeyRange) {
t.Errorf("splits contain the wrong sqls and/or keyranges, got: %v, want: %v", actualSqlsByKeyRange, expectedSqlsByKeyRange)
}
}
func TestMapKeyRangesToShards(t *testing.T) {
ts := new(sandboxTopo)
var testCases = []struct {
keyspace string
keyRange string
shards []string
}{
{keyspace: KsTestSharded, keyRange: "20-40", shards: []string{"20-40"}},
// check for partial keyrange, spanning one shard
{keyspace: KsTestSharded, keyRange: "10-18", shards: []string{"-20"}},
// check for keyrange intersecting with multiple shards
{keyspace: KsTestSharded, keyRange: "10-40", shards: []string{"-20", "20-40"}},
// check for keyrange intersecting with multiple shards
{keyspace: KsTestSharded, keyRange: "1c-2a", shards: []string{"-20", "20-40"}},
// check for keyrange where kr.End is Max Key ""
{keyspace: KsTestSharded, keyRange: "80-", shards: []string{"80-a0", "a0-c0", "c0-e0", "e0-"}},
// test for sharded, non-partial keyrange spanning the entire space.
{keyspace: KsTestSharded, keyRange: "", shards: []string{"-20", "20-40", "40-60", "60-80", "80-a0", "a0-c0", "c0-e0", "e0-"}},
// test for unsharded, non-partial keyrange spanning the entire space.
{keyspace: KsTestUnsharded, keyRange: "", shards: []string{"0"}},
}
for _, testCase := range testCases {
var keyRange *topodatapb.KeyRange
var err error
if testCase.keyRange == "" {
keyRange = &topodatapb.KeyRange{}
} else {
krArray, err := key.ParseShardingSpec(testCase.keyRange)
if err != nil {
t.Errorf("Got error while parsing sharding spec %v", err)
}
keyRange = krArray[0]
}
krs := []*topodatapb.KeyRange{keyRange}
_, gotShards, err := mapKeyRangesToShards(context.Background(), ts, "", testCase.keyspace, topodatapb.TabletType_MASTER, krs)
if err != nil {
t.Errorf("want nil, got %v", err)
}
sort.Strings(gotShards)
if !reflect.DeepEqual(testCase.shards, gotShards) {
t.Errorf("want \n%#v, got \n%#v", testCase.shards, gotShards)
}
}
}
func TestKeyRangeToShardMap(t *testing.T) {
ts := new(sandboxTopo)
var testCases = []struct {
keyspace string
keyRange string
shards []string
}{
{keyspace: TEST_SHARDED, keyRange: "20-40", shards: []string{"20-40"}},
// check for partial keyrange, spanning one shard
{keyspace: TEST_SHARDED, keyRange: "10-18", shards: []string{"-20"}},
// check for keyrange intersecting with multiple shards
{keyspace: TEST_SHARDED, keyRange: "10-40", shards: []string{"-20", "20-40"}},
// check for keyrange intersecting with multiple shards
{keyspace: TEST_SHARDED, keyRange: "1C-2A", shards: []string{"-20", "20-40"}},
// check for keyrange where kr.End is Max Key ""
{keyspace: TEST_SHARDED, keyRange: "80-", shards: []string{"80-A0", "A0-C0", "C0-E0", "E0-"}},
// test for sharded, non-partial keyrange spanning the entire space.
{keyspace: TEST_SHARDED, keyRange: "", shards: []string{"-20", "20-40", "40-60", "60-80", "80-A0", "A0-C0", "C0-E0", "E0-"}},
// test for unsharded, non-partial keyrange spanning the entire space.
{keyspace: TEST_UNSHARDED, keyRange: "", shards: []string{"0"}},
}
for _, testCase := range testCases {
var keyRange key.KeyRange
var err error
if testCase.keyRange == "" {
keyRange = key.KeyRange{Start: "", End: ""}
} else {
krArray, err := key.ParseShardingSpec(testCase.keyRange)
if err != nil {
t.Errorf("Got error while parsing sharding spec %v", err)
}
keyRange = krArray[0]
}
allShards, err := getKeyspaceShards(ts, "", testCase.keyspace, topo.TYPE_MASTER)
gotShards, err := resolveKeyRangeToShards(allShards, keyRange)
if err != nil {
t.Errorf("want nil, got %v", err)
}
if !reflect.DeepEqual(testCase.shards, gotShards) {
t.Errorf("want \n%#v, got \n%#v", testCase.shards, gotShards)
}
}
}
func TestMapExactShards(t *testing.T) {
ts := new(sandboxTopo)
var testCases = []struct {
keyspace string
keyRange string
shards []string
err string
}{
{keyspace: KsTestSharded, keyRange: "20-40", shards: []string{"20-40"}},
// check for partial keyrange, spanning one shard
{keyspace: KsTestSharded, keyRange: "10-18", shards: nil, err: "keyrange {Start: 10, End: 18} does not exactly match shards"},
// check for keyrange intersecting with multiple shards
{keyspace: KsTestSharded, keyRange: "10-40", shards: nil, err: "keyrange {Start: 10, End: 40} does not exactly match shards"},
// check for keyrange intersecting with multiple shards
{keyspace: KsTestSharded, keyRange: "1c-2a", shards: nil, err: "keyrange {Start: 1c, End: 2a} does not exactly match shards"},
// check for keyrange where kr.End is Max Key ""
{keyspace: KsTestSharded, keyRange: "80-", shards: []string{"80-a0", "a0-c0", "c0-e0", "e0-"}},
// test for sharded, non-partial keyrange spanning the entire space.
{keyspace: KsTestSharded, keyRange: "", shards: []string{"-20", "20-40", "40-60", "60-80", "80-a0", "a0-c0", "c0-e0", "e0-"}},
}
for _, testCase := range testCases {
var keyRange key.KeyRange
var err error
if testCase.keyRange == "" {
keyRange = key.KeyRange{Start: "", End: ""}
} else {
krArray, err := key.ParseShardingSpec(testCase.keyRange)
if err != nil {
t.Errorf("Got error while parsing sharding spec %v", err)
}
keyRange = krArray[0]
}
_, gotShards, err := mapExactShards(context.Background(), ts, "", testCase.keyspace, pb.TabletType_MASTER, keyRange)
if err != nil && err.Error() != testCase.err {
t.Errorf("gotShards: %v, want %s", err, testCase.err)
}
if !reflect.DeepEqual(testCase.shards, gotShards) {
t.Errorf("want \n%#v, got \n%#v", testCase.shards, gotShards)
}
}
}
func multisnapshotCmd(mysqld *mysqlctl.Mysqld, subFlags *flag.FlagSet, args []string) {
concurrency := subFlags.Int("concurrency", 8, "how many compression jobs to run simultaneously")
spec := subFlags.String("spec", "-", "shard specification")
tablesString := subFlags.String("tables", "", "dump only this comma separated list of regexp for tables")
excludeTablesString := subFlags.String("exclude_tables", "", "do not dump this comma separated list of regexp for tables")
skipSlaveRestart := subFlags.Bool("skip_slave_restart", false, "after the snapshot is done, do not restart slave replication")
maximumFilesize := subFlags.Uint64("maximum_file_size", 128*1024*1024, "the maximum size for an uncompressed data file")
keyType := subFlags.String("key_type", "uint64", "type of the key column")
subFlags.Parse(args)
if subFlags.NArg() != 2 {
log.Fatalf("action multisnapshot requires <db name> <key name>")
}
shards, err := key.ParseShardingSpec(*spec)
if err != nil {
log.Fatalf("multisnapshot failed: %v", err)
}
var tables []string
if *tablesString != "" {
tables = strings.Split(*tablesString, ",")
}
var excludedTables []string
if *excludeTablesString != "" {
excludedTables = strings.Split(*excludeTablesString, ",")
}
kit := key.KeyspaceIdType(*keyType)
if !key.IsKeyspaceIdTypeInList(kit, key.AllKeyspaceIdTypes) {
log.Fatalf("invalid key_type")
}
filenames, err := mysqld.CreateMultiSnapshot(shards, subFlags.Arg(0), subFlags.Arg(1), kit, tabletAddr, false, *concurrency, tables, excludedTables, *skipSlaveRestart, *maximumFilesize, nil)
if err != nil {
log.Fatalf("multisnapshot failed: %v", err)
} else {
log.Infof("manifest locations: %v", filenames)
}
}
// TODO(erez): Rename after migration to SplitQuery V2 is done.
func TestVTGateSplitQueryV2Sharded(t *testing.T) {
keyspace := "TestVTGateSplitQuery"
keyranges, err := key.ParseShardingSpec(DefaultShardSpec)
if err != nil {
t.Fatalf("got: %v, want: nil", err)
}
createSandbox(keyspace)
hcVTGateTest.Reset()
port := int32(1001)
for _, kr := range keyranges {
hcVTGateTest.AddTestTablet("aa", "1.1.1.1", port, keyspace, key.KeyRangeString(kr), topodatapb.TabletType_RDONLY, true, 1, nil)
port++
}
sql := "select col1, col2 from table"
bindVars := map[string]interface{}{"bv1": nil}
splitColumns := []string{"sc1", "sc2"}
algorithm := querypb.SplitQueryRequest_FULL_SCAN
type testCaseType struct {
splitCount int64
numRowsPerQueryPart int64
}
testCases := []testCaseType{
{splitCount: 100, numRowsPerQueryPart: 0},
{splitCount: 0, numRowsPerQueryPart: 123},
}
for _, testCase := range testCases {
splits, err := rpcVTGate.SplitQueryV2(
context.Background(),
keyspace,
sql,
bindVars,
splitColumns,
testCase.splitCount,
testCase.numRowsPerQueryPart,
algorithm)
if err != nil {
t.Errorf("got %v, want: nil. testCase: %+v", err, testCase)
}
// Total number of splits should be number of shards as our sandbox returns a single split
// for its fake implementation of SplitQuery.
if len(keyranges) != len(splits) {
t.Errorf("wrong number of splits, got %+v, want %+v. testCase:\n%+v",
len(splits), len(keyranges), testCase)
}
actualSqlsByKeyRange := map[string][]string{}
for _, split := range splits {
if split.KeyRangePart.Keyspace != keyspace {
t.Errorf("wrong keyspace, got \n%+v, want \n%+v. testCase:\n%+v",
keyspace, split.KeyRangePart.Keyspace, testCase)
}
if len(split.KeyRangePart.KeyRanges) != 1 {
t.Errorf("wrong number of keyranges, got \n%+v, want \n%+v. testCase:\n%+v",
1, len(split.KeyRangePart.KeyRanges), testCase)
}
kr := key.KeyRangeString(split.KeyRangePart.KeyRanges[0])
actualSqlsByKeyRange[kr] = append(actualSqlsByKeyRange[kr], split.Query.Sql)
}
expectedSqlsByKeyRange := map[string][]string{}
for _, kr := range keyranges {
perShardSplitCount := int64(math.Ceil(float64(testCase.splitCount) / float64(len(keyranges))))
shard := key.KeyRangeString(kr)
expectedSqlsByKeyRange[shard] = []string{
fmt.Sprintf(
"query:%v, splitColumns:%v, splitCount:%v,"+
" numRowsPerQueryPart:%v, algorithm:%v, shard:%v",
querytypes.BoundQuery{Sql: sql, BindVariables: bindVars},
splitColumns,
perShardSplitCount,
testCase.numRowsPerQueryPart,
algorithm,
shard,
),
}
}
if !reflect.DeepEqual(actualSqlsByKeyRange, expectedSqlsByKeyRange) {
t.Errorf(
"splits contain the wrong sqls and/or keyranges, "+
"got:\n%+v\n, want:\n%+v\n. testCase:\n%+v",
actualSqlsByKeyRange, expectedSqlsByKeyRange, testCase)
}
}
}