git.m6w6.name Git - m6w6/libmemcached/blob - clients/memstat.c

   1 #include "libmemcached/common.h"
   2 #include <stdio.h>
   3 #include <sys/types.h>
   4 #include <sys/stat.h>
   5 #include <sys/types.h>
   6 #include <sys/mman.h>
   7 #include <fcntl.h>
   8 #include <string.h>
   9 #include <getopt.h>
  10 #include <sys/time.h>
  11
  12 #include <libmemcached/memcached.h>
  13
  14 #include "client_options.h"
  15 #include "utilities.h"
  16
  17 #define PROGRAM_NAME "memstat"
  18 #define PROGRAM_DESCRIPTION "Output the state of a memcached cluster."
  19
  20 /* Prototypes */
  21 static void options_parse(int argc, char *argv[]);
  22 static void run_analyzer(memcached_st *memc, memcached_stat_st *stat,
  23                          memcached_server_st *server_list);
  24 static void print_server_listing(memcached_st *memc, memcached_stat_st *stat,
  25                                  memcached_server_st *server_list);
  26 static void print_analysis_report(memcached_st *memc,
  27                                   memcached_analysis_st *report,
  28                                   memcached_server_st *server_list);
  29
  30 static int opt_verbose= 0;
  31 static int opt_displayflag= 0;
  32 static int opt_analyze= 0;
  33 static char *opt_servers= NULL;
  34 static char *analyze_mode= NULL;
  35
  36 static struct option long_options[]=
  37 {
  38   {"version", no_argument, NULL, OPT_VERSION},
  39   {"help", no_argument, NULL, OPT_HELP},
  40   {"verbose", no_argument, &opt_verbose, OPT_VERBOSE},
  41   {"debug", no_argument, &opt_verbose, OPT_DEBUG},
  42   {"servers", required_argument, NULL, OPT_SERVERS},
  43   {"flag", no_argument, &opt_displayflag, OPT_FLAG},
  44   {"analyze", optional_argument, NULL, OPT_ANALYZE},
  45   {0, 0, 0, 0},
  46 };
  47
  48 int main(int argc, char *argv[])
  49 {
  50   memcached_return rc;
  51   memcached_st *memc;
  52   memcached_stat_st *memc_stat;
  53   memcached_server_st *servers;
  54   memcached_server_st *server_list;
  55
  56   options_parse(argc, argv);
  57
  58   if (!opt_servers)
  59   {
  60     char *temp;
  61
  62     if ((temp= getenv("MEMCACHED_SERVERS")))
  63       opt_servers= strdup(temp);
  64     else
  65     {
  66       fprintf(stderr, "No Servers provided\n\n");
  67       help_command(PROGRAM_NAME, PROGRAM_DESCRIPTION, long_options, 0);
  68       exit(1);
  69     }
  70   }
  71
  72   memc= memcached_create(NULL);
  73
  74   servers= memcached_servers_parse(opt_servers);
  75   memcached_server_push(memc, servers);
  76   memcached_server_list_free(servers);
  77
  78   memc_stat= memcached_stat(memc, NULL, &rc);
  79
  80   if (rc != MEMCACHED_SUCCESS && rc != MEMCACHED_SOME_ERRORS)
  81   {
  82     printf("Failure to communicate with servers (%s)\n",
  83            memcached_strerror(memc, rc));
  84     exit(1);
  85   }
  86
  87   server_list= memcached_server_list(memc);
  88
  89   if (opt_analyze)
  90     run_analyzer(memc, memc_stat, server_list);
  91   else
  92     print_server_listing(memc, memc_stat, server_list);
  93
  94   free(memc_stat);
  95   free(opt_servers);
  96
  97   memcached_free(memc);
  98
  99   return 0;
 100 }
 101
 102 static void run_analyzer(memcached_st *memc, memcached_stat_st *memc_stat,
 103                          memcached_server_st *server_list)
 104 {
 105   memcached_return rc;
 106
 107   if (analyze_mode == NULL)
 108   {
 109     memcached_analysis_st *report;
 110     report= memcached_analyze(memc, memc_stat, &rc);
 111     if (rc != MEMCACHED_SUCCESS || report == NULL)
 112     {
 113       printf("Failure to analyze servers (%s)\n",
 114              memcached_strerror(memc, rc));
 115       exit(1);
 116     }
 117     print_analysis_report(memc, report, server_list);
 118     free(report);
 119   }
 120   else if (strcmp(analyze_mode, "latency") == 0)
 121   {
 122     memcached_st **servers;
 123     uint32_t x, y, flags, server_count= memcached_server_count(memc);
 124     uint32_t num_of_tests= 32;
 125     const char *test_key= "libmemcached_test_key";
 126
 127     servers= malloc(sizeof(memcached_st*) * server_count);
 128     if (!servers)
 129     {
 130       fprintf(stderr, "Failed to allocate memory\n");
 131       return;
 132     }
 133
 134     for (x= 0; x < server_count; x++)
 135     {
 136       if((servers[x]= memcached_create(NULL)) == NULL)
 137       {
 138         fprintf(stderr, "Failed to memcached_create()\n");
 139         if (x > 0)
 140           memcached_free(servers[0]);
 141         x--;
 142         for (; x > 0; x--)
 143           memcached_free(servers[x]);
 144
 145         free(servers);
 146         return;
 147       }
 148       memcached_server_add(servers[x],
 149                            memcached_server_name(memc, server_list[x]),
 150                            memcached_server_port(memc, server_list[x]));
 151     }
 152
 153     printf("Network Latency Test:\n\n");
 154     struct timeval start_time, end_time;
 155     long elapsed_time, slowest_time= 0, slowest_server= 0;
 156
 157     for (x= 0; x < server_count; x++)
 158     {
 159       gettimeofday(&start_time, NULL);
 160       for (y= 0; y < num_of_tests; y++)
 161       {
 162         size_t vlen;
 163         char *val= memcached_get(servers[x], test_key, strlen(test_key),
 164                                  &vlen, &flags, &rc);
 165         if (rc != MEMCACHED_NOTFOUND && rc != MEMCACHED_SUCCESS)
 166           break;
 167         free(val);
 168       }
 169       gettimeofday(&end_time, NULL);
 170
 171       elapsed_time= timedif(end_time, start_time);
 172       elapsed_time /= num_of_tests;
 173
 174       if (elapsed_time > slowest_time)
 175       {
 176         slowest_server= x;
 177         slowest_time= elapsed_time;
 178       }
 179
 180       if (rc != MEMCACHED_NOTFOUND && rc != MEMCACHED_SUCCESS)
 181       {
 182         printf("\t %s (%d)  =>  failed to reach the server\n",
 183                memcached_server_name(memc, server_list[x]),
 184                memcached_server_port(memc, server_list[x]));
 185       }
 186       else
 187       {
 188         printf("\t %s (%d)  =>  %ld.%ld seconds\n",
 189                memcached_server_name(memc, server_list[x]),
 190                memcached_server_port(memc, server_list[x]),
 191                elapsed_time / 1000, elapsed_time % 1000);
 192       }
 193     }
 194
 195     if (server_count > 1 && slowest_time > 0)
 196     {
 197       printf("---\n");
 198       printf("Slowest Server: %s (%d) => %ld.%ld seconds\n",
 199              memcached_server_name(memc, server_list[slowest_server]),
 200              memcached_server_port(memc, server_list[slowest_server]),
 201              slowest_time / 1000, slowest_time % 1000);
 202     }
 203     printf("\n");
 204
 205     for (x= 0; x < server_count; x++)
 206       memcached_free(servers[x]);
 207
 208     free(servers);
 209     free(analyze_mode);
 210   }
 211   else
 212   {
 213     fprintf(stderr, "Invalid Analyzer Option provided\n");
 214     free(analyze_mode);
 215   }
 216 }
 217
 218 static void print_server_listing(memcached_st *memc, memcached_stat_st *memc_stat,
 219                                  memcached_server_st *server_list)
 220 {
 221   unsigned int x;
 222   memcached_return rc;
 223
 224   printf("Listing %u Server\n\n", memcached_server_count(memc));
 225   for (x= 0; x < memcached_server_count(memc); x++)
 226   {
 227     char **list;
 228     char **ptr;
 229
 230     list= memcached_stat_get_keys(memc, &memc_stat[x], &rc);
 231
 232     printf("Server: %s (%u)\n", memcached_server_name(memc, server_list[x]),
 233            memcached_server_port(memc, server_list[x]));
 234     for (ptr= list; *ptr; ptr++)
 235     {
 236       char *value= memcached_stat_get_value(memc, &memc_stat[x], *ptr, &rc);
 237
 238       printf("\t %s: %s\n", *ptr, value);
 239       free(value);
 240     }
 241
 242     free(list);
 243     printf("\n");
 244   }
 245 }
 246
 247 static void print_analysis_report(memcached_st *memc,
 248                                   memcached_analysis_st *report,
 249                                   memcached_server_st *server_list)
 250 {
 251   uint32_t server_count= memcached_server_count(memc);
 252
 253   printf("Memcached Cluster Analysis Report\n\n");
 254
 255   printf("\tNumber of Servers Analyzed         : %d\n", server_count);
 256   printf("\tAverage Item Size (incl/overhead)  : %u bytes\n",
 257          report->average_item_size);
 258
 259   if (server_count == 1)
 260   {
 261     printf("\nFor a detailed report, you must supply multiple servers.\n");
 262     return;
 263   }
 264
 265   printf("\n");
 266   printf("\tNode with most memory consumption  : %s:%u (%llu bytes)\n",
 267          memcached_server_name(memc, server_list[report->most_consumed_server]),
 268          memcached_server_port(memc, server_list[report->most_consumed_server]),
 269          (unsigned long long)report->most_used_bytes);
 270   printf("\tNode with least free space         : %s:%u (%llu bytes remaining)\n",
 271          memcached_server_name(memc, server_list[report->least_free_server]),
 272          memcached_server_port(memc, server_list[report->least_free_server]),
 273          (unsigned long long)report->least_remaining_bytes);
 274   printf("\tNode with longest uptime           : %s:%u (%us)\n",
 275          memcached_server_name(memc, server_list[report->oldest_server]),
 276          memcached_server_port(memc, server_list[report->oldest_server]),
 277          report->longest_uptime);
 278   printf("\tPool-wide Hit Ratio                : %1.f%%\n", report->pool_hit_ratio);
 279   printf("\n");
 280 }
 281
 282 static void options_parse(int argc, char *argv[])
 283 {
 284   memcached_programs_help_st help_options[]=
 285   {
 286     {0},
 287   };
 288
 289   int option_index= 0;
 290   int option_rv;
 291
 292   while (1)
 293   {
 294     option_rv= getopt_long(argc, argv, "Vhvds:a", long_options, &option_index);
 295     if (option_rv == -1) break;
 296     switch (option_rv)
 297     {
 298     case 0:
 299       break;
 300     case OPT_VERBOSE: /* --verbose or -v */
 301       opt_verbose = OPT_VERBOSE;
 302       break;
 303     case OPT_DEBUG: /* --debug or -d */
 304       opt_verbose = OPT_DEBUG;
 305       break;
 306     case OPT_VERSION: /* --version or -V */
 307       version_command(PROGRAM_NAME);
 308       break;
 309     case OPT_HELP: /* --help or -h */
 310       help_command(PROGRAM_NAME, PROGRAM_DESCRIPTION, long_options, help_options);
 311       break;
 312     case OPT_SERVERS: /* --servers or -s */
 313       opt_servers= strdup(optarg);
 314       break;
 315     case OPT_ANALYZE: /* --analyze or -a */
 316       opt_analyze= OPT_ANALYZE;
 317       analyze_mode= (optarg) ? strdup(optarg) : NULL;
 318       break;
 319     case '?':
 320       /* getopt_long already printed an error message. */
 321       exit(1);
 322     default:
 323       abort();
 324     }
 325   }
 326 }