|
| 1 | +package main |
| 2 | + |
| 3 | +import ( |
| 4 | + "fmt" |
| 5 | + "flag" |
| 6 | + "os" |
| 7 | + "sync" |
| 8 | + "time" |
| 9 | + "github.com/jackc/pgx" |
| 10 | +) |
| 11 | + |
| 12 | +type ConnStrings []string |
| 13 | + |
| 14 | +var backend interface{ |
| 15 | + prepare(connstrs []string) |
| 16 | + writer(id int, cCommits chan int, cAborts chan int, wg *sync.WaitGroup) |
| 17 | + reader(wg *sync.WaitGroup, cFetches chan int, inconsistency *bool) |
| 18 | +} |
| 19 | + |
| 20 | +var cfg struct { |
| 21 | + ConnStrs ConnStrings |
| 22 | + Backend string |
| 23 | + Verbose bool |
| 24 | + UseDtm bool |
| 25 | + Init bool |
| 26 | + Parallel bool |
| 27 | + Isolation string |
| 28 | + AccountsNum int |
| 29 | + ReadersNum int |
| 30 | + IterNum int |
| 31 | + |
| 32 | + Writers struct { |
| 33 | + Num int |
| 34 | + StartId int |
| 35 | + } |
| 36 | +} |
| 37 | + |
| 38 | +// The first method of flag.Value interface |
| 39 | +func (c *ConnStrings) String() string { |
| 40 | + if len(*c) > 0 { |
| 41 | + return (*c)[0] |
| 42 | + } else { |
| 43 | + return "" |
| 44 | + } |
| 45 | +} |
| 46 | + |
| 47 | +// The second method of flag.Value interface |
| 48 | +func (c *ConnStrings) Set(value string) error { |
| 49 | + *c = append(*c, value) |
| 50 | + return nil |
| 51 | +} |
| 52 | + |
| 53 | +func append_with_comma(s *string, x string) { |
| 54 | + if len(*s) > 0 { |
| 55 | + *s = *s + ", " + x |
| 56 | + } else { |
| 57 | + *s = x |
| 58 | + } |
| 59 | +} |
| 60 | + |
| 61 | +func dump_cfg() { |
| 62 | + fmt.Printf("Connections: %d\n", len(cfg.ConnStrs)) |
| 63 | + for _, cs := range cfg.ConnStrs { |
| 64 | + fmt.Printf(" %s\n", cs) |
| 65 | + } |
| 66 | + fmt.Printf("Isolation: %s\n", cfg.Isolation) |
| 67 | + fmt.Printf( |
| 68 | + "Accounts: %d × $%d\n", |
| 69 | + cfg.AccountsNum, 0, |
| 70 | + ) |
| 71 | + fmt.Printf("Readers: %d\n", cfg.ReadersNum) |
| 72 | + |
| 73 | + fmt.Printf( |
| 74 | + "Writers: %d × %d updates\n", |
| 75 | + cfg.Writers.Num, cfg.IterNum, |
| 76 | + ) |
| 77 | +} |
| 78 | + |
| 79 | +func init() { |
| 80 | + flag.StringVar(&cfg.Backend, "b", "transfers", |
| 81 | + "Backend to use. Default to 'transfers'") |
| 82 | + flag.Var(&cfg.ConnStrs, "C", |
| 83 | + "Connection string (repeat for multiple connections)") |
| 84 | + flag.BoolVar(&cfg.Init, "i", false, |
| 85 | + "Init database") |
| 86 | + flag.BoolVar(&cfg.UseDtm, "g", false, |
| 87 | + "Use DTM to keep global consistency") |
| 88 | + flag.IntVar(&cfg.AccountsNum, "a", 100000, |
| 89 | + "The number of bank accounts") |
| 90 | + flag.IntVar(&cfg.Writers.StartId, "s", 0, |
| 91 | + "StartID. Script will update rows starting from this value") |
| 92 | + flag.IntVar(&cfg.IterNum, "n", 10000, |
| 93 | + "The number updates each writer (reader in case of Reades backend) performs") |
| 94 | + flag.IntVar(&cfg.ReadersNum, "r", 1, |
| 95 | + "The number of readers") |
| 96 | + flag.IntVar(&cfg.Writers.Num, "w", 8, |
| 97 | + "The number of writers") |
| 98 | + flag.BoolVar(&cfg.Verbose, "v", false, |
| 99 | + "Show progress and other stuff for mortals") |
| 100 | + flag.BoolVar(&cfg.Parallel, "p", false, |
| 101 | + "Use parallel execs") |
| 102 | + repread := flag.Bool("l", false, |
| 103 | + "Use 'repeatable read' isolation level instead of 'read committed'") |
| 104 | + flag.Parse() |
| 105 | + |
| 106 | + if len(cfg.ConnStrs) == 0 { |
| 107 | + flag.PrintDefaults() |
| 108 | + os.Exit(1) |
| 109 | + } |
| 110 | + |
| 111 | + if cfg.AccountsNum < 2 { |
| 112 | + fmt.Println( |
| 113 | + "There should be at least 2 accounts (to avoid deadlocks)", |
| 114 | + ) |
| 115 | + os.Exit(1) |
| 116 | + } |
| 117 | + |
| 118 | + if *repread { |
| 119 | + cfg.Isolation = "repeatable read" |
| 120 | + } else { |
| 121 | + cfg.Isolation = "read committed" |
| 122 | + } |
| 123 | + |
| 124 | + dump_cfg() |
| 125 | +} |
| 126 | + |
| 127 | +func main() { |
| 128 | + if len(cfg.ConnStrs) < 2 { |
| 129 | + fmt.Println("ERROR: This test needs at leas two connections") |
| 130 | + os.Exit(1) |
| 131 | + } |
| 132 | + |
| 133 | + // switch cfg.Backend { |
| 134 | + // case "transfers": |
| 135 | + // backend = new(Transfers) |
| 136 | + // case "fdw": |
| 137 | + // backend = new(TransfersFDW) |
| 138 | + // case "readers": |
| 139 | + // backend = new(Readers) |
| 140 | + // case "pgshard": |
| 141 | + // backend = new(TransfersPgShard) |
| 142 | + // default: |
| 143 | + // fmt.Println("No backend named: '%s'\n", cfg.Backend) |
| 144 | + // return |
| 145 | + // } |
| 146 | + backend = new(TransfersTS) |
| 147 | + |
| 148 | + start := time.Now() |
| 149 | + |
| 150 | + if (cfg.Init){ |
| 151 | + backend.prepare(cfg.ConnStrs) |
| 152 | + fmt.Printf("database prepared in %0.2f seconds\n", time.Since(start).Seconds()) |
| 153 | + return |
| 154 | + } |
| 155 | + |
| 156 | + var writerWg sync.WaitGroup |
| 157 | + var readerWg sync.WaitGroup |
| 158 | + |
| 159 | + cCommits := make(chan int) |
| 160 | + cFetches:= make(chan int) |
| 161 | + cAborts := make(chan int) |
| 162 | + |
| 163 | + go progress(cfg.Writers.Num * cfg.IterNum, cCommits, cAborts) |
| 164 | + |
| 165 | + start = time.Now() |
| 166 | + writerWg.Add(cfg.Writers.Num) |
| 167 | + for i := 0; i < cfg.Writers.Num; i++ { |
| 168 | + go backend.writer(i, cCommits, cAborts, &writerWg) |
| 169 | + } |
| 170 | + running = true |
| 171 | + |
| 172 | + inconsistency := false |
| 173 | + readerWg.Add(cfg.ReadersNum) |
| 174 | + for i := 0; i < cfg.ReadersNum; i++ { |
| 175 | + go backend.reader(&readerWg, cFetches, &inconsistency) |
| 176 | + } |
| 177 | + |
| 178 | + writerWg.Wait() |
| 179 | + running = false |
| 180 | + readerWg.Wait() |
| 181 | + |
| 182 | + fmt.Printf("writers finished in %0.2f seconds\n", |
| 183 | + time.Since(start).Seconds()) |
| 184 | + fmt.Printf("TPS = %0.2f\n", |
| 185 | + float64(cfg.Writers.Num*cfg.IterNum)/time.Since(start).Seconds()) |
| 186 | + |
| 187 | + if inconsistency { |
| 188 | + fmt.Printf("INCONSISTENCY DETECTED\n") |
| 189 | + } |
| 190 | + fmt.Printf("done.\n") |
| 191 | +} |
| 192 | + |
| 193 | +var running = false |
| 194 | + |
| 195 | +func asyncCommit(conn *pgx.Conn, wg *sync.WaitGroup) { |
| 196 | + exec(conn, "commit") |
| 197 | + wg.Done() |
| 198 | +} |
| 199 | + |
| 200 | +func commit(conns ...*pgx.Conn) { |
| 201 | + var wg sync.WaitGroup |
| 202 | + wg.Add(len(conns)) |
| 203 | + for _, conn := range conns { |
| 204 | + go asyncCommit(conn, &wg) |
| 205 | + } |
| 206 | + wg.Wait() |
| 207 | +} |
| 208 | + |
| 209 | +func parallel_exec(conns []*pgx.Conn, requests []string) bool { |
| 210 | + var wg sync.WaitGroup |
| 211 | + state := true |
| 212 | + wg.Add(len(conns)) |
| 213 | + for i := range conns { |
| 214 | + if cfg.Parallel { |
| 215 | + go func(j int) { |
| 216 | + _, err := conns[j].Exec(requests[j]) |
| 217 | + if err != nil { |
| 218 | + state = false |
| 219 | + } |
| 220 | + wg.Done() |
| 221 | + }(i) |
| 222 | + } else { |
| 223 | + _, err := conns[i].Exec(requests[i]) |
| 224 | + if err != nil { |
| 225 | + state = false |
| 226 | + } |
| 227 | + wg.Done() |
| 228 | + } |
| 229 | + } |
| 230 | + wg.Wait() |
| 231 | + return state |
| 232 | +} |
| 233 | + |
| 234 | +func progress(total int, cCommits chan int, cAborts chan int) { |
| 235 | + commits := 0 |
| 236 | + aborts := 0 |
| 237 | + start := time.Now() |
| 238 | + for newcommits := range cCommits { |
| 239 | + newaborts := <-cAborts |
| 240 | + commits += newcommits |
| 241 | + aborts += newaborts |
| 242 | + if time.Since(start).Seconds() > 1 { |
| 243 | + if cfg.Verbose { |
| 244 | + fmt.Printf( |
| 245 | + "progress %0.2f%%: %d commits, %d aborts\n", |
| 246 | + float32(commits) * 100.0 / float32(total), commits, aborts, |
| 247 | + ) |
| 248 | + } |
| 249 | + start = time.Now() |
| 250 | + } |
| 251 | + } |
| 252 | +} |
| 253 | + |
| 254 | +func exec(conn *pgx.Conn, stmt string, arguments ...interface{}) { |
| 255 | + var err error |
| 256 | + // fmt.Println(stmt) |
| 257 | + _, err = conn.Exec(stmt, arguments... ) |
| 258 | + checkErr(err) |
| 259 | +} |
| 260 | + |
| 261 | +func execUpdate(conn *pgx.Conn, stmt string, arguments ...interface{}) bool { |
| 262 | + var err error |
| 263 | + // fmt.Println(stmt) |
| 264 | + _, err = conn.Exec(stmt, arguments... ) |
| 265 | + //if err != nil { |
| 266 | + // fmt.Println(err) |
| 267 | + //} |
| 268 | + return err == nil |
| 269 | +} |
| 270 | + |
| 271 | +func execQuery(conn *pgx.Conn, stmt string, arguments ...interface{}) int32 { |
| 272 | + var err error |
| 273 | + var result int32 |
| 274 | + err = conn.QueryRow(stmt, arguments...).Scan(&result) |
| 275 | + checkErr(err) |
| 276 | + return result |
| 277 | +} |
| 278 | + |
| 279 | +func execQuery64(conn *pgx.Conn, stmt string, arguments ...interface{}) int64 { |
| 280 | + var err error |
| 281 | + var result int64 |
| 282 | + err = conn.QueryRow(stmt, arguments...).Scan(&result) |
| 283 | + checkErr(err) |
| 284 | + return result |
| 285 | +} |
| 286 | + |
| 287 | +func checkErr(err error) { |
| 288 | + if err != nil { |
| 289 | + panic(err) |
| 290 | + } |
| 291 | +} |
| 292 | + |
| 293 | +// vim: expandtab ts=4 sts=4 sw=4 |
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