Technically, LinkedIn calls WhereHows "a data discovery lineage portal." From a business perspective, WhereHows is designed to surface data from multiple stores via metadata.
According to LinkedIn, WhereHows has captured the status of 50,000 datasets, 14,000 comments and 35 million job executions good for a storage footprint topping 15 petabytes.
In a blog post, LinkedIn outlined the reasons it built WhereHows--its big data ecosystem was too diversified with multiple applications designed to do one specific job. As a result, LinkedIn has everything from Informatica to Spark to Hive to Oracle to Hadoop to Teradata as well as a bevy of schedulers.;