Simple Log Service provides locally redundant storage (LRS) and zone-redundant storage (ZRS) to ensure data durability and availability. LRS enables data redundancy within one zone, and ZRS enables data redundancy across multiple zones. Simple Log Service is currently upgrading its storage redundancy feature, with capability status varying by region.
Region description
China (Hong Kong)
The China (Hong Kong) region now exclusively supports ZRS, ending LRS support.
For new projects, only ZRS is supported. LRS is not supported.
For existing projects, the underlying storage has been migrated to ZRS. As of April 7, 2025, the dataRedundancyType of all projects is modified to ZRS.
Other regions
Other regions with zone-redundant environments are undergoing architectural upgrades. Existing data will be automatically migrated to ZRS.
If you urgently need ZRS resources, submit a ticket to request ZRS for your newly created projects.
ZRS is supported in the following regions: China (Hangzhou), China (Shanghai), China (Beijing), China (Zhangjiakou), China (Ulanqab), China (Shenzhen), and Singapore.
LRS
LRS stores multiple copies of your data on multiple devices of different facilities in the same zone. LRS ensures data durability and availability even if hardware failures occur.
LRS stores multiple data copies across multiple zones in a region. If the region becomes unavailable, data is inaccessible.
ZRS
ZRS stores multiple copies of your data across multiple zones in the same region. If a zone becomes unavailable, data that is stored in other zones in the same region is still accessible.
If a data center becomes unavailable due to network disconnections, power outages, or other disasters, Simple Log Service continues to provide highly consistent services. This way, data is not lost during failovers. This helps meet the requirements of key business systems for minute-level access recovery and zero recovery point objective (RPO).
Differences between LRS and ZRS
The following table compares LRS and ZRS in terms of availability and pricing.
Storage redundancy type | Availability | Pricing |
LRS | 99.9% |
|
ZRS | 99.95% |
|