July 2017
Intermediate to advanced
414 pages
11h 18m
English
Real-time log messages are typically stored in Elasticsearch, which allows clients to query based on the text-based indexes. Apart from Elasticsearch, HDFS is also commonly used to store archived log messages. MongoDB or Cassandra are used to store summary data, such as monthly aggregated transaction counts. Offline log processing can be done using Hadoop map reduce programs.
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