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  1. WiredTiger
  2. WT-3202

wtperf report an error on in_memory=true mode : No such file or directory

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    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical - P2
    • Resolution: Fixed
    • Affects Version/s: WT2.8.0
    • Fix Version/s: WT2.9.2, 3.2.13, 3.4.4, 3.5.6
    • Component/s: None
    • Labels:
    • Environment:
      linux x86_64 2.6.32, wt-2.8.1 with MongoDB 3.2.9

      Description

      While I have a in_memory perf test with MongoDB-v3.2.9 (wiredTiger v2.8.1). wtperf runners file looks like:

      conn_config="cache_size=48G,in_memory=true,log=(enabled=false),file_manager=(close_idle_time=0),checkpoint=(wait=0,log_size=0),session_max=1024,statistics=(fast),statistics_log=(wait=5),eviction=(threads_max=4)"
      #compression="snappy"
      #sess_config="isolation=read-committed"
      table_config="type=file,memory_page_max=64m,internal_page_max=256K,leaf_page_max=4m,leaf_value_max=64MB,cache_resident=true"
      icount=1000000
      key_sz=32
      value_sz=32
      max_latency=2000
      populate_threads=24
      report_interval=1
      #random_value=true
      #run_time=2
      threads=((count=64,reads=1))
      sample_interval=1
      database_count=1
      table_count=8

      first of all. I run the command "wtperf -O in_memory.wtperf" with the "run_times" commenting. every thing is OK that population phase is done and wtperf exit. When I uncomment the "run_times" means that doing population phase first and execute "workload" after that. I got an error of "No such file or directory" and wtperf abort. The entire message is :

      worker: WT_SESSION.open_cursor: table:test00000 Error: No such file or directory

      so. I guess the table created at population phase is gone or never been seen by worker in "workload". And further investigation show that "close_reopen" is suspicious in wtperf.c line 2078 :

      /*

      • If we have a workload, close and reopen the connection so
      • that LSM can detect read-only workloads.
        */
        if (close_reopen(cfg) != 0)
        goto err;

      in_memory mode doesn't supply the support of LSM tree. That wouldn't be necessary here ?

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            • Assignee:
              sulabh.mahajan Sulabh Mahajan
              Reporter:
              michael_liuxin Michael Liu
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              Dates

              • Created:
                Updated:
                Resolved: