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EBS Snapshots: Optimizing RPO with N2WS and dynamic scheduling

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EBS snapshots, balancing the number and frequency of snapshots vs the need for the best RPO can be tricky. At peak hours data typically change at a much more rapid rate than during off-hours or weekends. The ability to make that distinction can save in terms of cost and the number of EBS snapshots.  N2WS Backup & Recovery allows such flexibility out of the box. As an example, let’s try to define the following elaborate scheduling:

  • Weekdays 08:00AM – 06:00PM – backup every 10 minutes
  • Weekdays 06:00PM – 08:00AM – backup every hour
  • Weekends (Saturdays and Sundays) – once a day

To do this, we will associate our N2WS backup policy (named “main_prod “) with three different N2WS schedule objects:

  1. Backup every 10 minutes, backup disabled between 06:00PM – 08:00AM every day. No backup at all on weekends
  2. Backup every hour, backup disabled between 08:00AM – 06:00PM every day. No backup at all on weekends
  3. Backup once a day, backup performed only on Saturday and Sunday

First schedule definition: CPM EBS snapshots dynamic scheduling sched1 definition As you can see, the backup is set for every 10 minutes starting 8:00AM. Backup is not performed on Saturdays & Sundays. For this schedule object, we define that it is disabled during nights by clicking “Configure” on the “Disabled Times in Day” column in the schedules tab and defining the following: CPM EBS snapshots dynamic scheduling sched1 disabled time Second schedule: CPM EBS snapshots dynamic scheduling sched2 definition This schedule starts a backup every hour, and, again, is not performed on Saturdays & Sundays. Its disabled times are the reverse of the first schedule: CPM EBS snapshots dynamic scheduling sched2 disabled time Now for the last schedule: CPM EBS snapshots dynamic scheduling sched3 definition This schedule does not need any disabled times, because it will work only on Saturdays & Sundays. So, now we need to simply associate all three schedules to the main_prod policy: CPM EBS snapshots dynamic scheduling policy definition

This fairly simple configuration allows fine-tuning backup scheduling in a way that supports the required RPO at required times, without creating an excessive number snapshots during off-hours. Try N2WS Backup & Recovery for FREE!

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