Alvin's Big Data Notebook
Alvin Cjin Blogspot. There are no rules, just tradeoffs.
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Best pages on Alvincjin.blogspot.com
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There are no rules, just tradeoffs
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Alvin's Notebook for Daily Learning: Pivot a Hive Table
To achieve this, we need to map 2 columns in one map entry, pivot it, then lookup from the map. Brickhouse provides a collect UDF. Example: Before, | ID | Category | Metric | | 1 | ...
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Alvin's Big Data Notebook : Require v.s. Assert in Scala
1. Require Require means that the caller of the method is at fault and should fix its call. Use require whenever you want a constraint on ...
Alvincjin.blogspot.com news digest
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6 years
Kafka Partition Leader and Controller
Zookeeper and Controller:
Every time a broker process starts, it registers itself with its id in Zookeper by creating an ephemeral node. When a broker loses connectivity to Zookeeper, the ephemeral node that the broker created when starting will be automatically removed from... -
6 years
What is a Container?
A container at its core is an allocation, portioning, and assignment of host resources such as CPU Shares, Network I/O, Bandwidth, Block I/O, and Memory, so that kernel level constructs may jail-off, isolate or “contain” these protected resources so... -
7 years
Consumer Retry
1. When you encounter a retriable error, is to commit the last record you processed successfully. Then, store the records that still need to be processed in a buffer, use the consumer pause() method to ensure that additional polls won't return data....
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Web host: | Google LLC |
Registrar: | MarkMonitor Inc. |
Registrant: | Google LLC |
Updated: | June 29, 2023 |
Expires: | July 31, 2024 |
Created: | July 31, 2000 |
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