Big data: Apache hive distributed sql computing platform
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Big data: Apache hive distributed sql computing platform
The previous MapReduce did not support sql and
supported java and python
, no
wonder
Written in sql language, hive will translate it for you
and directly execute MapReduce
Sql is very simple, very easy to use, and you
can play with distributed massive data development.
Sql is translated into MapReduce.
Everyone is happy
. It is simple and capable of big data
. Cool
hive is so awesome
hive simulation implementation
hive can do these two things
hive infrastructure
metadata store
sql parser
user interface
hive deployment
Hive is a single machine
, while MapReduce is multi-machine
Create a database and use it for hive
without computing or using hive
If you need to calculate, take
the advantage of hive when the amount of data is large
.
Summarize
提示：重要经验：
1)
2) Learn oracle well, even if the economy is cold, the whole test offer is definitely not a problem! At the same time, it is also the only way for you to test the public Internet police.
3) When seeking AC in the written test, space complexity may not be considered, but the interview must consider both the optimal time complexity and the optimal space complexity.