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This article mainly introduces the principle of hbase real-time query, the article is very detailed, has a certain reference value, interested friends must read it!

Real-time query can be thought of as a query from memory, and the general response time is less than 1 second. The mechanism of HBase is that the data is first written to memory, and then written to disk when the amount of data reaches a certain amount (such as 128m). In memory, there is no data update or merge operation, only data is added, which makes the user's write operation return immediately as soon as it enters the memory, which ensures the high performance of HBase I write O.

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