Integrate Duplicati with Backblaze B2
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    Integrate Duplicati with Backblaze B2

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    Article Summary

    Duplicati is a free, open-source backup program that runs on Windows, macOS, and Linux. Duplicati comes with a web interface for management and works with standard protocols like FTP, SSH, and WebDAV, as well as cloud storage providers like Backblaze B2 Cloud Storage. You can download Duplicati for your operating system here

    This guide covers installing Duplicati on Windows.

    Enable Backblaze B2

    Before you begin: You must have a Backblaze B2 Cloud Storage account. You can sign up here. If you already have a Backblaze account and the left navigation menu contains a B2 Cloud Storage section, your account is already enabled for Backblaze B2.

    1. Sign in to your Backblaze account.
    2. In the left navigation menu under Account, click My Settings.
    3. Under Enabled Products, select the checkbox to enable B2 Cloud Storage.
    4. Review the Terms and Conditions, and click OK to accept them. 

    Create a Bucket

    1. Sign in to your Backblaze account.
    2. In the left navigation menu under B2 Cloud Storage, click Buckets.
    3. Click Create a Bucket.
    4. Enter a name for your bucket.
      Bucket names must be at least six characters and globally unique. A message is displayed if your bucket name is already in use.
    5. Select a privacy setting: Private or Public.
      Files that are in a private bucket require authentication to perform an action, for example, downloading. Public buckets do not require authentication so you can easily share files. You can change a bucket's privacy settings at any time.
    6. If applicable, enable a Backblaze B2 server-side encryption key.
    7. Enable Object Lock to restrict a file from being modified or deleted for a specified period of time.
    8. Click Create a Bucket, and copy the value that is in the Endpoint field; you may need this value for other processes.
    9. Click Lifecycle Settings to control how long to keep the files in your new bucket.

    Create an Application Key

    Application keys control access to your Backblaze B2 Cloud Storage account and the buckets that are contained in your account.

    1. Sign in to your Backblaze account.
    2. In the left navigation menu under Account, click Application Keys.
    3. Click Add a New Application Key, and enter an app key name.
          You cannot search an app key by this name; therefore, app key names are not required to be globally unique.
    4. Select All or a specific bucket in the Allow Access to Bucket(s) dropdown menu.
    5. Optionally, select your access type (Read and Write, Read Only, or Write Only).
    6. Optionally, select the Allow List All Bucket Names checkbox (required for the B2 Native API b2_list_buckets and the S3-Compatible API S3 List Buckets operations).
    7. Optionally, enter a file name prefix to restrict application key access only to files with that prefix. Depending on what you selected in step #4, this limits application key access to files with the specified prefix for all buckets or just the selected bucket.
    8. Optionally, enter a positive integer to limit the time, in seconds, before the application key expires. The value must be less than 1000 days (in seconds).
    9. Click Create New Key, and note the resulting keyID and applicationKey values.
    When you create a new app key, the response contains the actual key string, for example N2Zug0evLcHDlh_L0Z0AJhiGGdY. You can always find the keyID on this page, but for security, the applicationKey appears only once. Make sure you copy and securely save this value elsewhere.

    Set Up Duplicati

    1. Run the Duplicati installer, and accept the default setting. 
    2. Open Duplicati, and click Yes on the First Run Setup dialog.
      You are not required to set a password, but you must click Yes to continue to the settings page.
    3. Optionally, you can enable the following settings:
      • Check the box next to Password, and enter and confirm your password.
      • Allow remote access.
      • Prevent tray icon automatic log-in.
    4. Scroll to the Default option section, and click the Add Advanced Option dropdown menu.
    5. Select asynchronous-concurrent-upload-limit, and enter 10 in the text field.
      Results depend on available bandwidth and client CPU strength. Backblaze recommends starting with a value of 10, and increasing the value depending on your system's capabilities.
    6. Click the Add Advanced Option dropdown menu, and select concurrency-max-threads.
      The value is set to 0 by default to dynamically balance the number of threads based on your hardware. You can increase the value depending on your system's capabilities. 
    7. Click the Add Advanced Option dropdown menu, select number-of-retries, and enter 15 into the text field.
      Increasing number-of-retries allows Duplicati to overcome temporary issues during an attempted file transfer. A value of 15 allows more time and opportunity for the transfer to succeed.
    8. Click OK.

    Configure a Backup

    1. Click Add backup in the left navigation menu, select Configure a new backup, and click Next.
      Duplicati does not define Cloud Destinations. Because of this, you must re-enter your cloud credentials for every backup source. 
    2. Enter a name and a description for the backup. 
    3. Encrypt the backup with a passphrase, or change the Encryption option to no encryption, and click Next.
    4. Select B2 Cloud Storage from the Storage Type dropdown menu. Enter the name of the Backblaze B2 bucket that will contain your back up.
    5. Enter your Backblaze B2 Key ID and App key, click Test connection, and click Next.
      If the bucket name that you entered does not exist, you are prompted to create a bucket.
    6. Select the source data for your backup.
      You can select individual folders or drives. You can expand the drives or folders to deselect any files that you do not want to back up.
    7. Apply any desired filters or exclude rules, and click Next.
    8. Set your backup schedule, and click Next.
    9. Enter 50 in the Remote volume size field, and set Backup Retention.
      The default remote volume size value is 50 MB for most users. Depending on your system capabilities you can set the volume size as high as 100. Backblaze recommends setting backup retention to Smart Backup.
    10. Click Save to complete the configuration.
      You can view backup status, logs, and restore files by selecting your backup from the list on the Home screen. 

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