+When using [session consistency](consistency-levels.md#guarantees-associated-with-consistency-levels), the client needs to guarantee that it can read its own writes. In single write region accounts where the read region preference is different from the write region, there could be cases where the user issues a write and when doing a read from a local region, the local region has not yet received the data replication (speed of light constraint). In such cases, the SDK detects the specific failure on the read operation and retries the read on the primary region to ensure session consistency.
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