If you serve numerous websites, you may want to configure the backup process so that it does not consume much server resources.

To configure server-wide backup settings:

  1. Go to Tools & Settings > Backup Manager (under "Tools & Resources") > Settings.

  2. (Optional) In the corresponding field, specify the maximum number of full backups files (including both scheduled and manual backups) that can be stored in any type of storage.

    For details, see "Backup Rotation".

  3. In the corresponding field, specify the maximum number of simultaneously running scheduled backup processes. The default value is 10.

  4. To make the backup processes release resources to other server processes, "Run all backup processes with low priority" is selected by default.

    You can choose to run only scheduled backups with low priority by selecting the corresponding checkbox.

    注釈: Both options increase backup time. Other server tasks will not work slower during backing up.

  5. To disable compression, select the "Do not compress backup files" checkbox.

  6. To prevent backing up processes from consuming all available disk space on the server, "Start the backup only if your server has the sufficient amount of free disk space" is selected by default.

    This option significantly increases backup time because Plesk additionally calculates the size of the future backup.

    If you know the approximate size of the future backup and do not want Plesk to waste time and resources on calculating it, clear the "Start the backup only if your server has the sufficient amount of free disk space" checkbox. Instead, in "Start the backup only if your server has the specified amount of free disk space", specify the approximate size of the future backup in megabytes.

    注釈: Plesk for Windows では、オブジェクトサイズを直接計算せず、データベースから取得します。Plesk データベースではオブジェクトサイズが 1 日に一度しか更新されず、算出されるバックアップサイズの合計が実際の値と異なる場合があるためです。

  7. Select whether to allow setting up FTP backup storage on the local Plesk server.

    Users can configure their FTP storage to be located on the same Plesk server where their subscriptions are hosted. If they do so, the amount of used disk space will double upon creation of each backup. This can cause the server to eventually run out of free disk space. To prevent this, we recommend that you do not select the "Allow setting up FTP backup storage on the local server" checkbox.

  8. Choose whether to save backups in the server storage if the upload to remote storage fails by selecting the corresponding checkbox.

    注釈: Backing up to the Plesk server storage is possible only for users with the "Backup and restoration of subscription data using the server storage" or "Backup and restoration of account data using the server storage" permissions.

  9. [OK]をクリックします。


サーバ(ローカル)のリポジトリに保存されるすべての Plesk バックアップに対してどのような保護を行うか選択することができます。

  • Plesk's encryption key. By default, certain sensitive data in a backup (for example, passwords of Plesk accounts) are encrypted with an internal key. The key is unique to each Plesk installation. Encrypting backups with Plesk keys is convenient but has certain limitations. When users restore backups created in other Plesk installations, the data is restored, but the original user passwords are lost, and new passwords are generated instead. In this case, the users will receive password change notifications by email. If you are going to restore a backup on another Plesk installation and want to avoid changing user passwords, use the Specified password option.

    注釈: The Plesk internal key encrypts only certain data in a backup but not the whole backup. If you store backups in remote cloud storage, you can enable backup encryption on the cloud storage side.

  • Specified password. You can specify a server-wide password to protect certain data in a backup. This type of protection is preferable and can be recommended in most cases. In particular, this may be useful in case of multiple Plesk installations, or if you store a backup on a mounted drive and use it for restoration if the drive with Plesk crashes. To restore all Plesk data including user passwords, you have to provide the same password that was specified for the backup.

上記のセキュリティ設定は、サーバ(ローカル)リポジトリに保存されたバックアップにのみ適用されます。FTP サーバにバックアップを保存する場合には、FTP ストレージ設定でパスワード保護を構成してください。詳しくは、「リモートストレージを構成する」を参照してください。

注釈: 契約のユーザがバックアップのダウンロード時に指定するパスワードは、サーバ全体のパスワードまたは暗号化キーと競合しません。このようなバックアップには、ユーザの指定したパスワードが使用されます。「バックアップファイルをアップロード/ダウンロードする」を参照してください。


デフォルトで、クラウドストレージ拡張をインストールすると、顧客とリセラーもこれを使用して手動バックアップを保存できるようになります。顧客とリセラーの使用を許可するクラウドストレージを管理するには、Backup to Cloud Pro フィーチャーを購入してください。

フィーチャーを購入すると、次の場合に、[パーミッション]タブで顧客とリセラーに対してインストール済みクラウドストレージサービスの使用を許可または禁止することができます([Show more available permissions(使用可能なパーミッションを追加で表示)]の下)。

  • 新規サービスプランとアドオンプランを追加するか、既存のサービスプランとアドオンプランを編集する。
  • 契約をカスタマイズする。

image cloud permissions



注釈: [リモートストレージへの契約データのバックアップと復元]パーミッションは、クラウドストレージへのバックアップの保存に関するパーミッションよりも優先されます。[リモートストレージへの契約データのバックアップと復元]がオンになっていない場合、たとえ該当するクラウドパーミッションがオンになっていても、顧客とリセラーはクラウドストレージにバックアップを保存できません。

Backup Rotation

To save disk space, you can set up a server-wide limit on the number of stored full backups in Tools & Settings > Backup Manager (under "Tools & Resources") > Settings. When the limit is reached, Plesk irrevocably deletes the oldest backup files to free up space for new ones. We call this process backup rotation.

注釈: The limit only affects full backups. The number of incremental backups is not limited.

注釈: The limit affects the Plesk server local storage and any configured remote storage.

image 78606

Backup rotation differentiates between manual and scheduled backups. If you have both manual and scheduled full backups whose number exceeds the limit, backup rotation deletes the oldest full backups in the following way:

  1. Keeps the latest manual backup.
  2. Keeps X-1 number of the latest scheduled backups, where X is the server-wide limit on the number of stored full backups.
  3. Deletes all other full backups.

For example, you have three manual backups and three scheduled backups. You set the server-wide limit on the number of stored full backups to three. After backup rotation, Plesk will keep the following full backups: the latest manual backup and the two latest scheduled ones.

Subscriptions, customers, and resellers have their own limits on the number of stored full backups in "Scheduled Backup Settings". Setting up the server-wide limit changes the corresponding limits for new and existing subscriptions, customers, and resellers to match the server-wide limit value. It will be impossible to set the limits for subscriptions, customers, and resellers higher than the server-wide limit (see the screenshot below).

image 78607

For example, a reseller has "Maximum number of full backup files to store" set to four. After you set the server-wide limit to two, the reseller's limit will be automatically set to two to match the server-wide limit. The reseller will not be able to change their limit to the value higher than two.