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InfluxDB
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We will split the data between different services each having ownership over a particular table. Then we can use a relational database such as PostgreSQL or a distributed NoSQL database such as Apache Cassandra for our use case.
This will give us the last time the user was active. This functionality will be handled by the presence service combined with Redis or Memcached as our cache.
Exactly once delivery and message ordering is challenging in a distributed system, we can use a dedicated message broker such as Apache Kafka or NATS to make our notification system more robust.
This will give us the last time the user was active. This functionality will be handled by the presence service combined with Redis or Memcached as our cache.
Exactly once delivery and message ordering is challenging in a distributed system, we can use a dedicated message broker such as Apache Kafka or NATS to make our notification system more robust.