primary site
In computing, the main or principal site, often in contexts like disaster recovery, content delivery, or network architecture.
障害発生時にプライマリサイトからセカンダリサイトへ自動的に切り替わる。
When a failure occurs, it automatically switches from the primary site to the secondary site.
Variant with interpunct, sometimes used for clarity.
Borrowed from English 'primary site', used in computing contexts.