mongodb读取测试

1. there are a large amount of data in Hbase (row numer = 3849920), read all data from mongodb again and below is the log:
  
[azureuser@h3crd-wlan31 ~]$ kubectl logs histclientsdataetl-20161028141055-doize |grep @ETL@ 
@ETL@ getLatestOnlineTime: 2016-10-27 23:59:59.815
@ETL@ get uplineDate from hbase: 2016-10-27 23:59:59.815
@ETL@ getCurrentPosFromDB: 2016-10-27 23:59:59.815
@ETL@ Start finding at time: 2016-10-28 15:00:17.991, startFindDayIndex=17101
@ETL@ Finding finished at time: 2016-10-28 15:00:21.551
@ETL@ Wrting to Hbase has been finished !
@ETL@readCount: 3849920,putCount: 0,time: 2016-10-28 15:11:48.784
@ETL@ child file name: 1.1.1.1-histclientsdataetl
@ETL@ Change logfile name has finished: 2016-10-28 15:11:48.792
@ETL@ cmd: sh /home/mongo-hive-hbase/Hive_HistClientsInfoAnalysis.sh
@ETL@: exec has finished!
@ETL@ new Executing remote hive shell has finished: 2016-10-28 15:12:49.273
@ETL@ result:

将代码改为批量获取后的效果（10695026条数据共4个G左右）：

public MongoCursor<Document> find(Bson filter)
    {
        FindIterable<Document> findIterable = this.collection.find(filter).batchSize(50000);
        MongoCursor<Document> mongoCursor = findIterable.iterator();

        return mongoCursor;
    }

[azureuser@h3crd-wlan31 ~]$ kubectl logs histclientsdataetl-xubd1 |grep @ETL@
@ETL@ getLatestOnlineTime: 2016-10-28 23:59:59.982
@ETL@ get uplineDate from hbase: 2016-10-28 23:59:59.982
@ETL@ getCurrentPosFromDB: 2016-10-28 23:59:59.982
@ETL@ Start finding at time: 2016-10-31 00:05:02.858, startFindDayIndex=17102
@ETL@ Finding finished at time: 2016-10-31 00:05:04.154
@ETL@ Wrting to Hbase has been finished !
@ETL@ upDateLatestOnlineTime: 2016-10-30 23:59:59.999
@ETL@readCount: 10695026,putCount: 10695026,time: 2016-10-31 00:48:41.78

数据量是之前的2.7倍，拉取时间4倍，读取的时候是从Mongodb的备服务器上读取

继续修改代码加batchsize增加一倍后：

public MongoCursor<Document> find(Bson filter)
    {
        FindIterable<Document> findIterable = this.collection.find(filter).batchSize(100000);
        MongoCursor<Document> mongoCursor = findIterable.iterator();

        return mongoCursor;
    }

[azureuser@h3crd-wlan31 ~]$ kubectl logs histclientsdataetl-20161031095007-qv4fd |grep @ETL@
@ETL@ getLatestOnlineTime: 2016-10-30 23:59:59.999
@ETL@ get uplineDate from hbase: 2016-10-30 23:59:59.999
@ETL@ getCurrentPosFromDB: 2016-10-30 23:59:59.999
@ETL@ Start finding at time: 2016-10-31 10:26:55.071, startFindDayIndex=17104
@ETL@ Finding finished at time: 2016-10-31 10:26:56.406
@ETL@ Wrting to Hbase has been finished !
@ETL@readCount: 7936993,putCount: 0,time: 2016-10-31 11:04:02.219

数据量2.06倍，时间3.08倍