question Re: HDFS Directory Structure Best Practices in Archives of Support Questions (Read Only)

HDFS Directory Structure Best Practices

plandis — Fri, 16 Sep 2022 10:55:11 GMT

Hi-

Can someone point me to a good resource for "best practices" for a hadoop directory structure for storing raw data, intermediate files, output files, metadata etc in HDFS? Do you segregate different data types into different directory structures? Are the directory structures labeled per YYMMDD? What would a typical HDFS directory structure look like when setting up to store data?

Re: HDFS Directory Structure Best Practices

surajacharya — Tue, 17 Jan 2017 21:01:12 GMT

Eric Sammer (author of Hadoop Operations) has written a great answer about the same here:

https://www.quora.com/What-is-the-best-directory-structure-to-store-different-types-of-logs-in-HDFS-over-the-time/answer/Eric-Sammer

Hadoop Operations is a great book and has quite a few good tricks.

Re: HDFS Directory Structure Best Practices

Karun — Fri, 25 Jan 2019 12:55:22 GMT

It could be depends on data layers in your HDFS directory, for instance, if you have raw and standard layer this would be one of the practices.

Raw is the first landing of data and need to be as close to the original data as possible. Standard is the staging of the data where it converted into different data formats and still no semantic changed have been done to data.

the structure for raw data and meta is :

raw/businessarea/sourcesystem/data/date&time

raw/businessarea/sourcesystem/meta/date&time

the structure of standard data/meta folder is: standard/businessarea/sourcesystem/data/date&time

standard/businessarea/sourcesystem/meta/date&time

these standards can also help to make sentry/ranger policies based AD groups