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Dell PowerVault MD 32XX/36XX Series Storage Arrays CLI Guide

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Scheduling Snapshots

  • NOTE: This command is applicable to both the Snapshot and the Snapshot (Legacy) premium feature.

Description

You can use the enableSchedule and the schedule parameters to schedule automatic snapshots. Automatic snapshots can be scheduled daily, weekly, or monthly (by day or by date). The enableSchedule parameter turns on or off the ability to schedule snapshots. When you enable scheduling, you use the schedule parameter to define when you want the snapshots to occur.

Parameters

Parameter Description
immediate Begins a snapshot operation immediately; a snapshot virtual disk is created and a copy-on-write operation begins.
startDate Defines a specific start date snapshot virtual disk creation. The format for this option is MM:DD:YY. If no start date is provided, the current date is used. For example: startDate=06:27:11.
scheduleDay Defines a day of the week you want to create a snapshot virtual disk and perform a copy-on-write operation. The values that you can enter are: monday, tuesday, wednesday, thursday, friday, saturday, sunday, and all. For example: scheduleDay=wednesday.
startTime Defines time of a day you want to create a snapshot virtual disk and start performing a copy-on-write operation. The format for entering the time is HH:MM, where HH is the hour and MM is the minute past the hour. Use a 24-hour clock. For example: startTime=14:27, which corresponds to 2:27 PM.
scheduleInterval Amount of time, in minutes that defines a minimum between two copy-on-write operations. It is possible for you to create a schedule in which you have overlapping copy-on-write operations because of the duration of a copy operation. You can ensure that copy-on-write operations maintain a correct interval by using this option. The maximum value for the scheduleInterval option is 1440 minutes. For example: scheduleInterval=180.
endDate Specific date to stop creating a snapshot virtual disk and end the copy-on-write operations. The format is MM:DD:YY, where MM is the month, DD the day and YY the year. For example: endDate=11:26:11.
noEndDate Use this option to prevent a scheduled copy-on-write operation from ending. If you later decide to end the copy-on-write operations, you must re-enter the create snapshotVirtualDisk command and specify an end date.
timesPerDay Number of times you want the snapshot schedule to run in a day. For example, timesPerDay=4.
timeZone Specifies the time zone to use for the scheduling operations, using one of the following values:
  • GMT±HH:MM—The offset from Greenwich Mean Time (GMT), in hours and minutes. For example, GMT-06:00 must be used to specify Central Standard Time (CST).
  • Text string—A standard time zone text string, in quotation marks. For example, "USA/Chicago" or "Germany/Berlin". Time zone text strings are case sensitive. If an incorrect text string is used, or no text string is specified, the default time zone is GMT. For example, CST can be specified in two different ways: timeZone=GMT-06:00 or timeZone="USA/Chicago.
  • NOTE: To remove a schedule, use the delete virtualDisk command with the schedule parameter. The delete command with the schedule parameter deletes only the schedule, not the snapshot virtual disk. Ensure that you do not inadvertently delete the virtual disk itself.
  • NOTE: If you also use the scheduleInterval option, the lowest value of the timesPerDay option and the scheduleInterval option is used. The value is determined by calculating an integer value for the scheduleInterval option. Divide 1440 by the scheduleInterval option value that you set. For example, 1440/180 = 8. This value is then compared to the timesPerDay integer value and the calculated scheduleInterval integer value; the smaller value is then used.

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