I am thinking about a DWH server layout and I’d like to ask you if you can spot any downsides to this layout. The basic idea is to have Staging Area & Data Warehouse DBs and the ETL Tool for the transformation from stg to dwh running on one single machine because of reduced hardware cost and less administration effort:
- sda: 512 GB SDD -> OS (Centos 7), Applications, Swap space, MySQL Database application (but no data), csv files from data sources, ETL tool (Pentaho)
- sdb: 960 GB SDD -> MySQL tablespace for staging area tables
- sdc: 960 GB SDD -> MySQL tablespace for data warehouse tables
- sdd: 4 TB HDD -> backup & archive disk
- Memory: 160 GB
- Prozessors: 2x Intel Xeon E5-2620v3 – 12 cores
- During stg loading: LOAD DATA INFILE from csv to stg
- During transformation: Pentaho would SELECT from stg and INSERT into dwh in parallel for multiple tables. I thought having stg and dwh on separate disks will avoid read / write bottlenecks
- During working hours: Reporting tool or Analysts do SELECT on dwh
From your point of view or experience is there any reason why I should not use this layout and instead split stg and dwh on two different servers like I did in the past? (e.g. MySQL performance might suffer from parallel SELECT and INSERT, etc.)
Thanks for your feedback!
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