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Hitachi Vantara Knowledge

Creating snapshot rules

  1. Navigate to Home Data Protection Snapshot Rules to display the Snapshot Rules page.

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    Field/Item Description
    EVS / File System Label The name of the EVS and file system.
    change Enables you to select a different EVS/file system.
    Filter Rule Name: The name of the snapshot rule. The name can be changed. The name can be up to 10 characters. Do not include spaces or special characters in the name.
    NoteThe name of the rule determines the names of the snapshots that are generated with it. For example, a rule with the name weekly generates snapshots called weekly1, weekly2, etc...
    File System: The current file system for the snapshot. Click filter to filter snapshots created by snapshot rules.
    Rule name The name of the rule for the EVS/file system.
    Queue Size Number of snapshots the system keeps before the oldest snapshot is deleted.
    File System The file system for the rule.
    Schedule The schedule for the rule.
    details Opens the Snapshot Rule Details page for a rule.
    add Adds a rule.
    delete Deletes a selected rule.
    Snapshots Opens the Snapshots page.
    Snapshot Schedules Opens the Snapshots Schedules page.
  2. Click add to display the Add Snapshot Rule page.

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    Field/Item Description
    change Sets the EVS/File system.
    Name The name for the rule.
    Queue Size Number of snapshots to keep before the system automatically deletes the oldest snapshot. The default queue size is four. The maximum size is 1024.
    • Click change to select the file system.

    • In the Name field, type a name for the rule (containing up to 30 characters). Do not include spaces or special characters in the name.

      The name of the rule determines the names of the snapshots that are generated with it. For example, YYYY-MM-DD_HHMM[timezone information].rulename. in which date and time are expressed in the indicated format, timezone information is a placeholder for the offset from Greenwich Mean Time, and rulename is the name of the file.

      If more than one snapshot is generated per minute by a particular rule, the names will be suffixed with .a, .b, .c and so on.

      For example, a rule with the name frequent generates snapshots called:

      2002-06-17_1430+0100.frequent

      2002-06-17_1430+0100.frequent.a

      2002-06-17_1430+0100.frequent.b

      and so on.

    • In the Queue Size field, specify the number of snapshots to keep before the system automatically deletes the oldest snapshot. The maximum is 1024 snapshots per rule.
    NoteThe system automatically deletes the oldest snapshot when the number of snapshots, associated to a snapshot rule, reaches the specified queue limit. However, any or all of the snapshots may be deleted at any time, and new snapshots can be taken.
  3. Define the snapshot rule, and select a file system.

  4. Assign a schedule.

    1. Select the rule to which you want to add a schedule, and click details.

      Fill the check box next to the name of the rule to which you want to add a schedule, and click details to display the Snapshot Rule Details page.
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      Field/Item Description
      File System Displays the current file system. Click change to select a different file system.
      Name The name of the snapshot rule. The name can be changed. Do not include spaces or special characters in the name. Asterisks can be used as a wildcard for zero or more characters, and are used for a case-insensitive substring match.
      NoteThe name of the rule determines the names of the snapshots that are generated with it. For example, a rule with the name weekly generates snapshots called weekly1, weekly2, and so on.
      Queue Size The number of snapshots to keep before the system automatically deletes the oldest snapshot. The maximum is 1024.
    2. Click add to display the Add Snapshot Schedule for rule page.

    3. Specify the schedule for the rule.

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      Field/Item Description
      EVS/File System

      Displays the name of the currently selected EVS and file system. Click change to select a different file system.

      Snapshot Rule List of possible snapshot rules to select from.
      Cron Schedule Displays the schedule in crontab syntax. If you are familiar with the Unix crontab format, you can enter the schedule directly in the field. Otherwise, click cron creator to open the Build Cron Expression dialog and configure to schedule.

      Cron expression syntax: The cron expression is a series of five numbers that indicate the snapshot schedule. The syntax is mm hh dd yy z, in which mm is the minutes (0-59), hh is the hour (0-23), dd is the day of the month (1-31), yy is the month (1-12), and z is the day of the week (0-6, Sunday is 0 or 7). For example: 15 2 21 3 * takes a snapshot at 2:15 AM on the 21st of March, and 5 15 * * 6 takes a snapshot at 3:05 PM every Saturday.

      cron creator Creates a new schedule.
      Recipients One or more email addresses to receive snapshot notifications. To add an address in the list, enter the address and click Add. To remove an address, select it in the list and click Delete.
      You can click cron creator and build your schedule, or you can specify the schedule directly in the Cron Schedule field.

      For more information on the cron syntax, refer to the UI help page and the crontab command in the Command Line Reference.

    4. Enter an email address to be notified upon completion of each snapshot.

    In the Recipients field, you can enter a single email address or multiple email addresses. Multiple addresses should be separated with a semicolon (;). Hitachi Vantara Support Center recommends sending Snapshot notifications to at least one user.
  5. Verify your settings, then click OK to save or Cancel to decline.

    You are returned to the Snapshot Rules page, which summarizes properties for the rule you just created.

 

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