Plan to create Azure VM snapshot and AWS EC2 snapshot by Commvault and keep 3 snapshot copies for each VM.
1, the snapshot is full snapshot? or we have chance to create incr. snapshot for cost saving.
2, how to calculate snapshot cost?
Cloud VM snapshot
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3 June 2022
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Plan to create Azure VM snapshot and AWS EC2 snapshot by Commvault and keep 3 snapshot copies for each VM.
1, the snapshot is full snapshot? or we have chance to create incr. snapshot for cost saving.
2, how to calculate snapshot cost?
Hi
All snapshots are ‘incremental’ snapshots (we don't use archive snapshots). The longer you keep them around, the bigger they become and the more costly they are to keep. AWS charges 0.05c per GB-month.
BUT, AWS describes the first snapshot to be ‘full’ in nature regardless since its initiates a full copy of the allocated volume to S3.
Snapshot storage is based on the amount of space your data consumes in Amazon S3. Because Amazon EBS does not save empty blocks, it is likely that the snapshot size will be considerably less than your volume size. For the first snapshot of a volume, Amazon EBS saves a full copy of your data to Amazon S3. For each incremental snapshot, only the changed part of your Amazon EBS volume is saved.
Its difficult to calculate as you could have a 1000GB volume, with only 100GB of data used, your first ‘full’ snapshot will be 100GB and subsequent snapshots depend on the change rate. if you have a 20% change rate then you could pay up to 120GB @ 0.05c for a months retention ($6). Of course the change rate is not instant and grows over time, so its more of a ramp up over time.
Anyway, using that you can try guestimate costs, but its not so easy as you can see.
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