MongoDB克隆（db.copyDatabase），克隆只有一半的數據庫

我有數據庫有大約4 GB的數據，當我嘗試轉儲它通過mongodump然後它只轉儲大約1,93 GB的東西。當我試圖通過db.copyDatabase()克隆它時，它會複製與mongodump相同數量的數據。MongoDB克隆（db.copyDatabase），克隆只有一半的數據庫

MongoDb有一些限制嗎？

感謝您的幫助和抱歉，我的英語不好（我希望你能理解我）。

編輯

{ 
     "ns" : "some-db.persons", 
     "firstExtent" : "0:31000 ns:some-db.persons", 
     "lastExtent" : "4:b50d000 ns:some-db.persons", 
     "extentCount" : 13, 
     "extents" : [ 
       { 
         "loc" : "0:31000", 
         "xnext" : "0:42000", 
         "xprev" : "null", 
         "nsdiag" : "some-db.persons", 
         "size" : 32768, 
         "firstRecord" : "0:310b0", 
         "lastRecord" : "0:38e3c" 
       }, 
       { 
         "loc" : "0:42000", 
         "xnext" : "0:62000", 
         "xprev" : "0:31000", 
         "nsdiag" : "some-db.persons", 
         "size" : 131072, 
         "firstRecord" : "0:420b0", 
         "lastRecord" : "0:61e64" 
       }, 
       { 
         "loc" : "0:62000", 
         "xnext" : "0:e2000", 
         "xprev" : "0:42000", 
         "nsdiag" : "some-db.persons", 
         "size" : 524288, 
         "firstRecord" : "0:620b0", 
         "lastRecord" : "0:e0f0c" 
       }, 
       { 
         "loc" : "0:e2000", 
         "xnext" : "0:372000", 
         "xprev" : "0:62000", 
         "nsdiag" : "some-db.persons", 
         "size" : 2097152, 
         "firstRecord" : "0:e20b0", 
         "lastRecord" : "0:2e1d94" 
       }, 
       { 
         "loc" : "0:372000", 
         "xnext" : "0:dd6000", 
         "xprev" : "0:e2000", 
         "nsdiag" : "some-db.persons", 
         "size" : 8388608, 
         "firstRecord" : "0:3720b0", 
         "lastRecord" : "0:b71e80" 
       }, 
       { 
         "loc" : "0:dd6000", 
         "xnext" : "0:2233000", 
         "xprev" : "0:372000", 
         "nsdiag" : "some-db.persons", 
         "size" : 11325440, 
         "firstRecord" : "0:dd60b0", 
         "lastRecord" : "0:18a2db8" 
       }, 
       { 
         "loc" : "0:2233000", 
         "xnext" : "1:2000", 
         "xprev" : "0:dd6000", 
         "nsdiag" : "some-db.persons", 
         "size" : 15290368, 
         "firstRecord" : "0:22330b0", 
         "lastRecord" : "0:30c7e20" 
       }, 
       { 
         "loc" : "1:2000", 
         "xnext" : "1:223d000", 
         "xprev" : "0:2233000", 
         "nsdiag" : "some-db.persons", 
         "size" : 20643840, 
         "firstRecord" : "1:20b0", 
         "lastRecord" : "1:13b1e9c" 
       }, 
       { 
         "loc" : "1:223d000", 
         "xnext" : "2:2000", 
         "xprev" : "1:2000", 
         "nsdiag" : "some-db.persons", 
         "size" : 27869184, 
         "firstRecord" : "1:223d0b0", 
         "lastRecord" : "1:3cd0e7c" 
       }, 
       { 
         "loc" : "2:2000", 
         "xnext" : "2:73ba000", 
         "xprev" : "1:223d000", 
         "nsdiag" : "some-db.persons", 
         "size" : 37625856, 
         "firstRecord" : "2:20b0", 
         "lastRecord" : "2:23e3dd8" 
       }, 
       { 
         "loc" : "2:73ba000", 
         "xnext" : "3:4bd7000", 
         "xprev" : "2:2000", 
         "nsdiag" : "some-db.persons", 
         "size" : 50798592, 
         "firstRecord" : "2:73ba0b0", 
         "lastRecord" : "2:a42be78" 
       }, 
       { 
         "loc" : "3:4bd7000", 
         "xnext" : "4:b50d000", 
         "xprev" : "2:73ba000", 
         "nsdiag" : "some-db.persons", 
         "size" : 68579328, 
         "firstRecord" : "3:4bd70b0", 
         "lastRecord" : "3:8d3dda4" 
       }, 
       { 
         "loc" : "4:b50d000", 
         "xnext" : "null", 
         "xprev" : "3:4bd7000", 
         "nsdiag" : "some-db.persons", 
         "size" : 92581888, 
         "firstRecord" : "4:b50d0b0", 
         "lastRecord" : "4:ba17118" 
       } 
     ], 
     "datasize" : 244286608, 
     "nrecords" : 268872, 
     "lastExtentSize" : 92581888, 
     "padding" : 1, 
     "firstExtentDetails" : { 
       "loc" : "0:31000", 
       "xnext" : "0:42000", 
       "xprev" : "null", 
       "nsdiag" : "some-db.persons", 
       "size" : 32768, 
       "firstRecord" : "0:310b0", 
       "lastRecord" : "0:38e3c" 
     }, 
     "lastExtentDetails" : { 
       "loc" : "4:b50d000", 
       "xnext" : "null", 
       "xprev" : "3:4bd7000", 
       "nsdiag" : "some-db.persons", 
       "size" : 92581888, 
       "firstRecord" : "4:b50d0b0", 
       "lastRecord" : "4:ba17118" 
     }, 
     "objectsFound" : 218678, 
     "invalidObjects" : 0, 
     "bytesWithHeaders" : 207046812, 
     "bytesWithoutHeaders" : 203547964, 
     "deletedCount" : 6, 
     "deletedSize" : 87297536, 
     "nIndexes" : 1, 
     "keysPerIndex" : { 
       "some-db.persons.$_id_" : 268872 
     }, 
     "valid" : true, 
     "errors" : [ ], 
     "ok" : 1 
}

來源

2013-05-04 user1607808

數據的可能都在那裏; MongoDB隨着時間的推移分配額外的空間，不會包含在副本中。檢查集合中的文檔計數以進行驗證。

來源

2013-05-04 13:59:38 JohnnyHK

好的，我檢查了它。首先收集我擁有的96279個文檔，第二個集合僅包含70596個文檔的268872個文檔。我有想法，我會嘗試複製第二個集合。 – user1607808 2013-05-04 14:06:55

好吧，我試了一下，但它仍然只複製70 596文檔。 – user1607808 2013-05-04 14:15:14

@ user1607808嗯......你是否驗證源集合來檢查它們的問題？ 'db.mycoll.validate（）'或'db.mycoll.validate（{full：true}）' – JohnnyHK 2013-05-04 15:24:50

MongoDB克隆（db.copyDatabase），克隆只有一半的數據庫

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