What is the Difference between apache hive and impala ?

Answer : Hive generates query expressions at compile time…

Apache hive Vs Impala

Apache hive Impala
Hive generates query expressions at compile
time;Hive is batch based Hadoop MapReduce
Impala does not support for complex types
and fault tolerance.
Apache does not generations runtime code
for “big loops ” using llvm.
Impala does generations runtime code
for “big loops ” using llvm.
Hadoop 2.7.3 Hadoop 2.6.0
All queries run through LLAP Runtime Filtering Optimization Enabled
ORCFile format with zlib compression Parquet format with snappy compression
Every hive query has this problem of “cold start”. Impala avoids startup overhead as daemon
processes are started at boot time itself,
always being ready to processes a query.
Apache Hive might not be ideal for interactive computing Impala is meant for interactive computing.
Hive is batch based Hadoop MapReduce. Impala is more like MPP database.
Hive supports complex types. Impala does not support complex types.
Apache Hive is fault tolerant. Impala does not support fault tolerance.
It is more universal, versatile and pluggable language. It is used unleash its brute processing power
and give lightning fast analytic results.
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