Backup in the Cloud era – what is changing?

Hello there!

Hope this post find you well. These days one of my customers ask me to advise him on backup/restore procedures and solutions on a new environment running on AWS.

Production databases will run on EC2 instances, on Oracle with BYOL (bring your own license). Customer is thinking about EBS (Elastic Block Storage) solutions or S3 (Simple Storage Service).

Snapshots in Oracle world usually are used in conjunction with begin/end backup operations. If you take 1 snapshot per day only, and you are not willing to lost 24hs of commited data you need to have a second backup strategy. There is a product offered by N2WS which is quite amazing in orchestrating, scheduling and controlling the snapshots – you can configure to take a picture every 5 min – which is usually lower than a business RTO. But how about a logical corruption, a wrong delete done on last weekend. How to restore this? You must retain snaps for a week, maybe a month, maybe a year, restore this snap in another EC2 instance and manually restore data. Seems costly, right?

The ideal world way – from the documentation – is to deploy OSBCS Oracle Secure Backup Cloud Service. This (paid) option give you the ability to use S3 as tape, so minimal adjustments need to be done in order to migrate your backup strategy to the cloud. You need to setup and install OSBCS on each EC2 instance, adjust your channels to use OSBCS and you are ready to go! RMAN retention, catalog, everything go smoothly if you choose to pay for this option. How OSBCS is charged? Per Channel.

So, if you have 100 databases, you can buy for example 10 channels, and make 1 backup at time with 10 channels, or 10 backups at time with 1 channel, or 2 backups at time with 5 channels, or 5 backups at time with 2 channels, or – you got the idea.

Comments are welcome =]

See you around,

Hang.

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