# `2-DC` Multi-Active Solution

![`smart`](MultiActive_aa_001_20221025.png)

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In addition, some users use this method to do multi-active solution with two data centers. Each data center hosts a TiDB cluster, and the business is divided into two databases. Each database serves a portion of the data. Each data center's business only accesses one database. The data changes in the database are synchronized to the opposite data center through binlog, forming a circular backup.

In this solution, only `binlog` is asynchronously replicated between data centers. When network latency between data centers is high, the amount of data that lags behind the primary cluster increases. When the primary cluster fails, data loss is possible, and the amount of lost data will be affected by factors such as networking delays.