How Many Copies of Data are Maintained by Azure Storage Account with Locally-Redundant Storage (LRS)?

A

For an Azure Storage account that uses locally-redundant storage (LRS), the correct answer is A. 3.

Locally-redundant storage (LRS) is an Azure storage replication option that ensures data durability and availability within a single data center. When you choose LRS for your storage account, Azure automatically creates and maintains three copies of your data within that data center.

Here's a breakdown of how LRS works:

1. Data Center: Azure stores your data in a single data center.
2. Data Replication: Within the data center, Azure creates three copies of your data.
3. Data Distribution: The three copies are distributed across multiple storage nodes to ensure high availability and fault tolerance. This distribution helps protect against hardware failures and provides redundancy.
4. Durability and Availability: By maintaining three copies of your data, Azure ensures that even if one copy becomes unavailable due to a hardware or network failure, your data remains accessible from the remaining two copies. This redundancy provides durability and availability for your stored data.

It's important to note that LRS provides replication within a single data center only. If the entire data center experiences an outage or disaster, LRS alone does not protect against data loss. To achieve higher levels of redundancy and protection against data center failures, you can consider using other Azure storage replication options such as geo-redundant storage (GRS) or zone-redundant storage (ZRS).

In summary, an Azure Storage account using locally-redundant storage (LRS) maintains three copies of data within a single data center, ensuring durability and availability within that specific location.

An Azure Storage account is a secure, durable, and scalable cloud storage solution that can be used to store different types of data, such as files, blobs, tables, and queues.

Azure Storage offers various redundancy options to help protect against data loss and ensure high availability of stored data. One of these options is locally-redundant storage (LRS), which is designed to replicate data within the same data center, providing a cost-effective option for applications that don't require the highest levels of durability or availability.

With LRS, Azure Storage maintains three copies of data within a single data center, which are stored on separate racks to protect against hardware failures. This means that if one copy of the data becomes unavailable due to a hardware failure, the other two copies can still be accessed. The three copies are kept in sync using Azure's replication technology, which continuously replicates changes to all copies in real-time.

Therefore, the correct answer to the question is A. 3 copies of data are maintained by an Azure Storage account that uses locally-redundant storage (LRS).