Locally Redundant Storage (LRS) vs Zone-Redundant Storage (ZRS)

 

Locally-Redundant Storage (LRS)	Zone Redundant Storage (ZRS)	Geo-redundant storage (GRS)
Replication	Replicates your data 3 times within a single physical location synchronously in the primary region.	Replicates your data across 3 Azure Availability Zones synchronously in the primary region	Replicates your data in your storage account to a secondary region
Redundancy	Low	Moderate	High
Cost	Provides the least expensive replication option	Costs more than LRS but provides higher availability	Costs more than ZRS but provides availability in the event of regional outages
Percent durability of objects over a given year	At least 99.999999999% (11 9’s)	At least 99.9999999999% (12 9’s)	At least 99.99999999999999% (16 9’s)
Availability SLA for read requests	At least 99.9% (99% for cool access tier)	At least 99.9% (99% for cool access tier)	At least 99.9% (99% for cool access tier) for GRS  At least 99.99% (99.9% for cool access tier) for RA-GRS
Availability SLA for write requests	At least 99.9% (99% for cool access tier)	At least 99.9% (99% for cool access tier)	At least 99.9% (99% for cool access tier)
Available if a node went down within a data center?	Yes	Yes	Yes
Available if the entire data center (zonal or non-zonal) went down?	No	Yes	Yes
Available on region-wide outage in the primary region?	No	No	Yes
Has read access to the secondary region if the primary region is unavailable?	No	No	Yes
Supported storage account types	General-purpose v2 General-purpose v1 Block blob storage Blob storage File storage	General-purpose v2 Block blob storage File storage	General-purpose v2 General-purpose v1 Blob storage