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The number of queries allowed in parallel via llap. Negative number implies 'infinite'.

LLAP

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Cache

hive.llap.object.

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cache.enabled

• Default Value: nulltrue
• Added In: Hive 2.0.0 with ..

Cache objects (plans, hashtables, etc) in LLAP

hive.llap.io.

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use.lrfu

• Default Value:  false
• Added In: Hive 2.0.0 with ..

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Whether ORC low-level cache should use Least Frequently / Frequently Used (LRFU) cache policy instead of default First-In-First-Out (FIFO).

hive.llap.io.

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lrfu.lambda

• Default Value: : 0.01f
• Possible Values: Between 0 and 1
• Added In: Hive 2.0.0 with ..

Lambda for ORC low-level cache LRFU cache policy. Must be in [0, 1].

0 makes LRFU behave like LFU, 1 makes it behave like LRU, values in between balance accordingly.

LLAP I/O

hive.llap.io.

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enabled

• Default Value:  null
• Added In: Hive 2.0.0 with ..

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Whether the LLAP I/O layer is enabled.  Remove property or set to false to disable LLAP I/O.

hive.llap.io.cache.orc.size

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Maximum size for IO allocator or ORC low-level cache.

hive.llap.io.threadpool.size

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Specify the number of threads to use for low-level IO thread pool.

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hive.llap.io.orc.time.counters

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hive.llap.io.allocator.direct

• Default Value:  true
• Added In: Hive 2.0.0 with HIVE-12597

...Whether ORC low-level cache should use direct allocation.

LLAP CBO

hive.llap.auto.allow.uber

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hive.llap.auto.enforce.vectorized

• Default Value:  true
• Added In: Hive 2.0.0 with ..

...Enforce that inputs are vectorized, before considering vertex

hive.llap.auto.enforce.stats

• Default Value:  true
• Added In: Hive 2.0.0 with ..

...Enforce that column stats are available, before considering vertex.

hive.llap.auto.max.input.size

• Default Value:  10*1024*1024*1024L
• Added In: Hive 2.0.0 with ..

...Check input size, before considering vertex (-1 disables check)

hive.llap.auto.max.output.size

• Default Value:  1*1024*1024*1024L
• Added In: Hive 2.0.0 with ..

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hive.llap.object.cache.enabled

• Default Value: true
• Added In: Hive 2.0.0 with ..

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Check output size, before considering vertex (-1 disables check)

LLAP Metrics

hive.llap.queue.metrics.percentiles.intervals

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By default, percentile latency metrics are disabled. 

LLAP UDF Security

Whitelist based UDF support (HIVE-12852)

hive.llap.

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allow.permanent.fns

• Default Value:  true
• Added In: Hive 2.0.0 with ..

...Whether LLAP decider should allow permanent UDFs.

hive.llap.daemon.download.permanent.fns

• Default Value: 
• Added In: Hive 2.0.0 with ..

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LLAP Cache

hive.llap.io.use.lrfu

• Default Value: false
• Added In: Hive 2.0.0 with ..

Whether

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hive.llap.io.lrfu.lambda

• Default Value: 0.01f
• Possible Values: Between 0 and 1
• Added In: Hive 2.0.0 with ..

Lambda for ORC low-level cache LRFU cache policy. Must be in [0, 1].

0 makes LRFU behave like LFU, 1 makes it behave like LRU, values in between balance accordingly.

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LLAP daemon should localize the resources for permanent UDFs.

LLAP Security

hive.llap.daemon.keytab.file

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