[GitHub] trafficserver issue #1603: if we had a server with big diskspace, function b...

[bluestn <gi...@git.apache.org>]

GitHub user bluestn opened an issue:

    https://github.com/apache/trafficserver/issues/1603

    if we had a server with big diskspace, function build_vol_hash_table cost to much to build the vol_hash_table for CacheVol

      **if the Volume  space is 50TB, the rtable_size will be 50* 1000 * 1000 / 8=6250000,it cost too much memory and cpu usage( see the code in build_vol_hash_table listed below), maybe we need to optimize this build_vol_hash_table function.** 
    
      rtable_pair *rtable = (rtable_pair *)ats_malloc(sizeof(rtable_pair) * rtable_size);
      int rindex = 0;
      for (int i = 0; i < num_vols; i++)
        for (int j = 0; j < (int)rtable_entries[i]; j++) {
          rtable[rindex].rval = next_rand(&rnd[i]);
          rtable[rindex].idx = i;
          rindex++;
        }


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