[100% Interview Question] Cache and Persist in Spark

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[balajichandramohan]

Hi sir, this is topic related to Oracle.

[mani.kandan]

Nice video bro I'm from tamil nadu

[DS-bowu]

Hi Ankush, Thanks for the video, I have one query. suppose if I am using Persist(StorageLevel.DISK_ONLY), then how will it improve Spark application performance because if this application will need this data again then it will have to read from DISK only, so there will be more I/O operations with the disks and as we all know spark doesn't do unnecessary I/O operations with the disks and it is the main reason why Spark is better than MapReduce.

[pardeep]

Hi Ankush, how long the cached data will survive in memory, does it automatically gets removed when the session ends?