[Scala] 예외 처리 ( Option, Either, Try )
NullPointerException 을 처리하기 위한 여러가지 방법
Posted by
Wonyong Jang
on April 29, 2021 ·
8 mins read
[Scala] collection API
Traversable, Seq, List, Array, Vector, map, flatMap, takeWhile, take, groupBy
Posted by
Wonyong Jang
on April 23, 2021 ·
11 mins read
[Spark] Streaming Graceful Shutdown
How to do graceful shutdown of spark streaming job / sigkill, sigterm, sigint 차이
Posted by
Wonyong Jang
on April 19, 2021 ·
9 mins read
[Spark] Streaming Data Sources
Kafka, Kinesis / Direct, Receiver Based Data Sources, Fault Tolerance / Backpressure
Posted by
Wonyong Jang
on April 15, 2021 ·
7 mins read
[Spark] 아파치 스파크(spark) RDD 여러가지 연산
지연 처리 방식의 Transformation, 즉시 실행 방식의 Action / narrow, wide transformation
Posted by
Wonyong Jang
on April 12, 2021 ·
22 mins read
[Spark] 아파치 스파크(spark) 시작하기
Driver, Executor, Node, Job, Stage, Task, Cluster Manager/ RDD, Fault tolerance / Hadoop
Posted by
Wonyong Jang
on April 11, 2021 ·
16 mins read
[DB] MongoDB Index 설계 전략
인덱스 설계와 성능 향상 방법 / 쿼리 상태 점검(currentOp) 및 종료(killOp)
Posted by
Wonyong Jang
on April 06, 2021 ·
27 mins read