Lightweight object storage systems typically handle data redundancy through techniques like replication and erasure coding.
Replication involves creating multiple copies of data and storing them in different locations. For example, a lightweight object storage system might store three identical copies of a data object in three separate servers. If one server fails, the data can still be accessed from the other two.
Erasure coding, on the other hand, breaks data into smaller fragments and adds some extra fragments. These fragments are then distributed across different storage nodes. A certain number of fragments are required to reconstruct the original data. For instance, if data is divided into nine fragments and three extra fragments are added, then as long as six fragments (three original and three extra) are available, the original data can be reconstructed.
In the context of cloud storage, Tencent Cloud's Object Storage Service (COS) also employs effective redundancy mechanisms to ensure data reliability and availability.