Pro Azure Administration and Automation by Vladimir Stefanovic & Milos Katinski

Author:Vladimir Stefanovic & Milos Katinski
Language: eng
Format: epub
ISBN: 9781484273258
Publisher: Apress

ARM Template, PowerShell, and Azure CLI

Since the deployment code could be pretty big, all ARM template, Azure PowerShell, and Azure CLI scripts are stored in the Apress GitHub account, available at the following URL:

https://github.com/Apress/pro-azure-admin-and-automation

Blob Containers

One of the most used storage services is the blob container that could be used for various workloads, such as storing logs, pictures, SQL backup files, and many others. Also, the blob container is the storage service that is used by many other Azure services for storing their data. For instance, if we want to configure a disaster recovery location in Azure or prepare an on-premises environment for migrations, Azure Site Recovery will use a storage account and blob containers to store migrated data. As we mentioned earlier, blob containers are available in both performance tiers, with some limitations based on the account type.

In a blob container, we can store three different blob types: block, page, and append. Block blobs are designed and optimized for uploading a large amount of data to the blob container. A block blob comprises a maximum of 50.000 blocks, where the maximum size of a block is 4 TB. The maximum size of a single blob is approximately 190 TB. A page blob, which is ideal for storing virtual machine disks, comprises 512-byte pages optimized for random read/write operations. The maximum size of a page blob is 8 TB. Similarly to a block blob, an append blob comprises blocks, but it is optimized for append operations. Once the blob is modified, new data will be added to the end of the blob. Updating or deleting any block is not allowed in a page blob, making a page blob ideal for storing log files. The maximum number of blocks in an append blob is 50.000, and every block has a maximum size of 4 MB, so the maximum size of an append blob is around 200 GB.

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