# Company `A`
+ Company `A` is a famous social media company
  + 1.2 million QPS, 9 billion accounts
+ Numerous backend services use HBase to support 100 critical business use cases
+ Company `A`'s HBase footprint: 9,000 VMs, 50 production clusters, 6 PBs of data
+ Typical HBase use case: record administration history

![`smart`](./student-guide/diagram/CaseStudySocialCompanyBackground_aa_001_20230326.png)
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Numerous critical businesses at company A rely on HBase, including administration history as one example.

The administration history records user rule violations, the subsequent actions taken against the user and the timelines for each action. 

The support for transaction is necessary to prevent repetitive punishments; guarantee the accuracy of the publicly available transparent report.