Describe Azure Storage Services Flashcards
Describe Azure storage redundancy
Azure storage always stores multiple copies of your data so that it’s protected from planned and unplanned events such as transient hardware failures, network or power outages, and natural disasters.
Redundancy in the primary region
Data in an Azure Storage account is always replicated 3x in the primary region. Azure Storage offers two options for how your data is replicated in the primary region, locally redundant storage (LRS) and zone-redundant storage (ZRS).
Define Locally redundant storage
Locally redundant storage (LRS) replicates your data 3x withing a single data center in the primary region. LRS provides at least 11 nines of durability. It is the lowest-cost redundancy option and offers the least durability. LRS protects your data against server rack and drive failures.
Define Zone-redundant storage
ZRS replicates your Azure storage data synchronously (at the same time) across 3 azure availability zones in the primary region. They offer 12 nines of durability. With ZRS, your data is still accessible for both read and write operations even if a zone becomes unavailable.
Redundancy in a second region
two options: geo-redundant storage (GRS) and Geo-zone-redundant storage (GZRS). By default, data in the secondary region isn’t available for read or write unless there’s a failover to the secondary region.
Geo-redundant storage
copies your data synchronously (at the same time) 3x within a single physical location the primary regions using LRS. It then copies your data asynchronously (not the same time) to a single physical location in the secondary region using LRS. it offers 16 nines of durability
Geo-zone-redundant storage
GZRS combines the high availability provided by redundancy across availability zones with protections from regional outages provided by geo-replications. So it takes it from one region that has a copy in 3 different availability zones and puts it into a second region as an LRS…meaning they are all in one data center. This gets 16 nines of durability.
Describe Blob Storage
A massively scalable object store for text and binary data. Also includes support for big data analytics through Data Lake Storage Gen 2. It is unstructured.
Blob storage tiers
Hot access tier: Optimized for storing data that is accessed frequently.
Cool access tier: Optimized for data that is infrequently accessed and stored for at least 30 days.
Archive access tier: Appropriate for data that is rarely accessed and stored for at least 180 days, with flexible latency requirements.
Latency refers to a time delay, a good latency would be a low one and a higher one is slower.
Only the hot and cool access tiers can be set at the account level.
They can all be set at the blob level, during or after upload.
Azure files
They are managed file shares for cloud or on-premise deployments. Azure files offer fully managed file shares in the cloud that are accessible via the industry standard Server Message Block (SMB) or Network System (NFS) protocols. Since they follow these protocols you can seamlessly replace your on-premise files shared with this.
Queue storage
it is a service for storing large numbers of messages.
Disk Storage
Disk storage, or azure managed disks, are block-level storage volumes managed by Azure for use with Azure VMs. The same as a physical disk, but they’re virtualized.
Define Azure Migrate
It is a service that helps you migrate from an on-premise environment to the cloud. Azure migrate functions as a hub to help you manage the assessment and migration of your on-premise datacenter to azure.
Define Azure Data Box
It is a physical migration service that helps transfer large amounts of data in a quick, inexpensive, and reliable way. They ship you the box that holds 80 terabytes. It is transported to and from your datacenter. A rugged case protects and secures the box from damage.
AzCopy
It is a command line utility that you can use to copy blobs or files to or from your storage account. With it, you can upload files, download files, copy files between storage accounts, and even synchronize files. It copies one direction meaning only from point A to point B. And it can be used between other cloud providers.
