concurrency, benchmark: read-committed STM isolation policy
parent
f34a9350c3
commit
51551abef5
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@ -56,6 +56,12 @@ func NewSTMSerializable(ctx context.Context, c *v3.Client, apply func(STM) error
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return runSTM(s, apply)
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return runSTM(s, apply)
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}
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}
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// NewSTMReadCommitted initiates a new read committed transaction.
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func NewSTMReadCommitted(ctx context.Context, c *v3.Client, apply func(STM) error) (*v3.TxnResponse, error) {
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s := &stmReadCommitted{stm{client: c, ctx: ctx, getOpts: []v3.OpOption{v3.WithSerializable()}}}
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return runSTM(s, apply)
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}
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type stmResponse struct {
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type stmResponse struct {
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resp *v3.TxnResponse
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resp *v3.TxnResponse
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err error
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err error
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@ -234,6 +240,14 @@ func (s *stmSerializable) commit() *v3.TxnResponse {
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return nil
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return nil
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}
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}
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type stmReadCommitted struct{ stm }
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// commit always goes through when read committed
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func (s *stmReadCommitted) commit() *v3.TxnResponse {
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s.rset = nil
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return s.stm.commit()
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}
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func isKeyCurrent(k string, r *v3.GetResponse) v3.Cmp {
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func isKeyCurrent(k string, r *v3.GetResponse) v3.Cmp {
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rev := r.Header.Revision + 1
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rev := r.Header.Revision + 1
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if len(r.Kvs) != 0 {
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if len(r.Kvs) != 0 {
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@ -52,7 +52,7 @@ var (
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func init() {
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func init() {
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RootCmd.AddCommand(stmCmd)
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RootCmd.AddCommand(stmCmd)
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stmCmd.Flags().StringVar(&stmIsolation, "isolation", "r", "Repeatable Reads (r) or Serializable (s)")
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stmCmd.Flags().StringVar(&stmIsolation, "isolation", "r", "Read Committed (c), Repeatable Reads (r), or Serializable (s)")
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stmCmd.Flags().IntVar(&stmKeyCount, "keys", 1, "Total unique keys accessible by the benchmark")
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stmCmd.Flags().IntVar(&stmKeyCount, "keys", 1, "Total unique keys accessible by the benchmark")
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stmCmd.Flags().IntVar(&stmTotal, "total", 10000, "Total number of completed STM transactions")
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stmCmd.Flags().IntVar(&stmTotal, "total", 10000, "Total number of completed STM transactions")
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stmCmd.Flags().IntVar(&stmKeysPerTxn, "keys-per-txn", 1, "Number of keys to access per transaction")
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stmCmd.Flags().IntVar(&stmKeysPerTxn, "keys-per-txn", 1, "Number of keys to access per transaction")
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@ -78,6 +78,8 @@ func stmFunc(cmd *cobra.Command, args []string) {
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}
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}
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switch stmIsolation {
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switch stmIsolation {
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case "c":
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mkSTM = v3sync.NewSTMReadCommitted
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case "r":
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case "r":
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mkSTM = v3sync.NewSTMRepeatable
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mkSTM = v3sync.NewSTMRepeatable
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case "s":
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case "s":
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