ctdb/tests/src/ctdb_fetch.c

   1 /*
   2    simple ctdb benchmark
   3
   4    Copyright (C) Andrew Tridgell  2006
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "system/filesys.h"
  22 #include "popt.h"
  23 #include "cmdline.h"
  24
  25 #include <sys/time.h>
  26 #include <time.h>
  27
  28 static struct timeval tp1,tp2;
  29
  30 static void start_timer(void)
  31 {
  32         gettimeofday(&tp1,NULL);
  33 }
  34
  35 static double end_timer(void)
  36 {
  37         gettimeofday(&tp2,NULL);
  38         return (tp2.tv_sec + (tp2.tv_usec*1.0e-6)) -
  39                 (tp1.tv_sec + (tp1.tv_usec*1.0e-6));
  40 }
  41
  42
  43 static int timelimit = 10;
  44 static int num_records = 10;
  45 static int num_nodes;
  46 static int msg_count;
  47
  48 #define TESTKEY "testkey"
  49
  50 /*
  51   fetch a record
  52   store a expanded record
  53   send a message to next node to tell it to do the same
  54 */
  55 static void bench_fetch_1node(struct ctdb_context *ctdb)
  56 {
  57         TDB_DATA key, data, nulldata;
  58         struct ctdb_db_context *ctdb_db;
  59         TALLOC_CTX *tmp_ctx = talloc_new(ctdb);
  60         int dest, ret;
  61         struct ctdb_record_handle *h;
  62
  63         key.dptr = discard_const(TESTKEY);
  64         key.dsize = strlen(TESTKEY);
  65
  66         ctdb_db = ctdb_db_handle(ctdb, "test.tdb");
  67
  68         h = ctdb_fetch_lock(ctdb_db, tmp_ctx, key, &data);
  69         if (h == NULL) {
  70                 printf("Failed to fetch record '%s' on node %d\n",
  71                        (const char *)key.dptr, ctdb_get_pnn(ctdb));
  72                 talloc_free(tmp_ctx);
  73                 return;
  74         }
  75
  76         if (data.dsize > 1000) {
  77                 data.dsize = 0;
  78         }
  79
  80         if (data.dsize == 0) {
  81                 data.dptr = (uint8_t *)talloc_asprintf(tmp_ctx, "Test data\n");
  82         }
  83         data.dptr = (uint8_t *)talloc_asprintf_append((char *)data.dptr,
  84                                                       "msg_count=%d on node %d\n",
  85                                                       msg_count, ctdb_get_pnn(ctdb));
  86         if (data.dptr == NULL) {
  87                 printf("Failed to create record\n");
  88                 talloc_free(tmp_ctx);
  89                 return;
  90         }
  91         data.dsize = strlen((const char *)data.dptr)+1;
  92
  93         ret = ctdb_record_store(h, data);
  94         talloc_free(h);
  95         if (ret != 0) {
  96                 printf("Failed to store record\n");
  97         }
  98
  99         talloc_free(tmp_ctx);
 100
 101         /* tell the next node to do the same */
 102         nulldata.dptr = NULL;
 103         nulldata.dsize = 0;
 104
 105         dest = (ctdb_get_pnn(ctdb) + 1) % num_nodes;
 106         ctdb_client_send_message(ctdb, dest, 0, nulldata);
 107 }
 108
 109 /*
 110   handler for messages in bench_ring()
 111 */
 112 static void message_handler(struct ctdb_context *ctdb, uint64_t srvid,
 113                             TDB_DATA data, void *private_data)
 114 {
 115         msg_count++;
 116         bench_fetch_1node(ctdb);
 117 }
 118
 119
 120 /*
 121  * timeout handler - noop
 122  */
 123 static void timeout_handler(struct event_context *ev, struct timed_event *timer,
 124                             struct timeval curtime, void *private_data)
 125 {
 126         return;
 127 }
 128
 129 /*
 130   benchmark the following:
 131
 132   fetch a record
 133   store a expanded record
 134   send a message to next node to tell it to do the same
 135
 136 */
 137 static void bench_fetch(struct ctdb_context *ctdb, struct event_context *ev)
 138 {
 139         int pnn=ctdb_get_pnn(ctdb);
 140
 141         if (pnn == num_nodes - 1) {
 142                 bench_fetch_1node(ctdb);
 143         }
 144
 145         start_timer();
 146         event_add_timed(ev, ctdb, timeval_current_ofs(timelimit,0), timeout_handler, NULL);
 147
 148         while (end_timer() < timelimit) {
 149                 if (pnn == 0 && msg_count % 100 == 0 && end_timer() > 0) {
 150                         printf("Fetch: %.2f msgs/sec\r", msg_count/end_timer());
 151                         fflush(stdout);
 152                 }
 153                 if (event_loop_once(ev) != 0) {
 154                         printf("Event loop failed!\n");
 155                         break;
 156                 }
 157         }
 158
 159         printf("Fetch: %.2f msgs/sec\n", msg_count/end_timer());
 160 }
 161
 162 /*
 163   handler for reconfigure message
 164 */
 165 static void reconfigure_handler(struct ctdb_context *ctdb, uint64_t srvid,
 166                                 TDB_DATA data, void *private_data)
 167 {
 168         int *ready = (int *)private_data;
 169         *ready = 1;
 170 }
 171
 172 /*
 173   main program
 174 */
 175 int main(int argc, const char *argv[])
 176 {
 177         struct ctdb_context *ctdb;
 178         struct ctdb_db_context *ctdb_db;
 179
 180         struct poptOption popt_options[] = {
 181                 POPT_AUTOHELP
 182                 POPT_CTDB_CMDLINE
 183                 { "timelimit", 't', POPT_ARG_INT, &timelimit, 0, "timelimit", "integer" },
 184                 { "num-records", 'r', POPT_ARG_INT, &num_records, 0, "num_records", "integer" },
 185                 { NULL, 'n', POPT_ARG_INT, &num_nodes, 0, "num_nodes", "integer" },
 186                 POPT_TABLEEND
 187         };
 188         int opt;
 189         const char **extra_argv;
 190         int extra_argc = 0;
 191         poptContext pc;
 192         struct event_context *ev;
 193         TDB_DATA key, data;
 194         struct ctdb_record_handle *h;
 195         int cluster_ready=0;
 196
 197         pc = poptGetContext(argv[0], argc, argv, popt_options, POPT_CONTEXT_KEEP_FIRST);
 198
 199         while ((opt = poptGetNextOpt(pc)) != -1) {
 200                 switch (opt) {
 201                 default:
 202                         fprintf(stderr, "Invalid option %s: %s\n",
 203                                 poptBadOption(pc, 0), poptStrerror(opt));
 204                         exit(1);
 205                 }
 206         }
 207
 208         /* talloc_enable_leak_report_full(); */
 209
 210         /* setup the remaining options for the main program to use */
 211         extra_argv = poptGetArgs(pc);
 212         if (extra_argv) {
 213                 extra_argv++;
 214                 while (extra_argv[extra_argc]) extra_argc++;
 215         }
 216
 217         if (num_nodes == 0) {
 218                 printf("You must specify the number of nodes\n");
 219                 exit(1);
 220         }
 221
 222         ev = event_context_init(NULL);
 223         tevent_loop_allow_nesting(ev);
 224
 225         ctdb = ctdb_cmdline_client(ev, timeval_current_ofs(3, 0));
 226
 227         if (ctdb == NULL) {
 228                 printf("failed to connect to ctdb daemon.\n");
 229                 exit(1);
 230         }
 231
 232         ctdb_client_set_message_handler(ctdb, CTDB_SRVID_RECONFIGURE, reconfigure_handler,
 233                                  &cluster_ready);
 234
 235         /* attach to a specific database */
 236         ctdb_db = ctdb_attach(ctdb, timeval_current_ofs(2, 0), "test.tdb",
 237                               false, 0);
 238         if (!ctdb_db) {
 239                 printf("ctdb_attach failed - %s\n", ctdb_errstr(ctdb));
 240                 exit(1);
 241         }
 242
 243         ctdb_client_set_message_handler(ctdb, 0, message_handler, &msg_count);
 244
 245         printf("Waiting for cluster\n");
 246         while (1) {
 247                 uint32_t recmode=1;
 248                 ctdb_ctrl_getrecmode(ctdb, ctdb, timeval_zero(), CTDB_CURRENT_NODE, &recmode);
 249                 if (recmode == 0) break;
 250                 event_loop_once(ev);
 251         }
 252
 253         /* This test has a race condition. If CTDB receives the message from previous
 254          * node, before this node has registered for that message, this node will never
 255          * receive that message and will block on receive. Sleeping for some time will
 256          * hopefully ensure that the test program on all the nodes register for messages.
 257          */
 258         printf("Sleeping for %d seconds\n", num_nodes);
 259         sleep(num_nodes);
 260         bench_fetch(ctdb, ev);
 261
 262         key.dptr = discard_const(TESTKEY);
 263         key.dsize = strlen(TESTKEY);
 264
 265         printf("Fetching final record\n");
 266
 267         h = ctdb_fetch_lock(ctdb_db, ctdb, key, &data);
 268
 269         if (h == NULL) {
 270                 printf("Failed to fetch record '%s' on node %d\n",
 271                        (const char *)key.dptr, ctdb_get_pnn(ctdb));
 272                 exit(1);
 273         }
 274
 275         printf("DATA:\n%s\n", (char *)data.dptr);
 276
 277         return 0;
 278 }