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OMS data retention
When performing analytics against datasets, the duration of that data is an important consideration, as is its retention. OMS offers a variety of pricing tiers to suit your budget and needs, and the retention periods for the various OMS pricing tiers are very well defined. Remember that there are five pricing tiers that you can choose from for your workspace:
- Free: On the free tier, data is retained for seven days
- Per Node (OMS): Log Analytics makes the last 31 days of data available on this tier
- Per GB (Standalone): Log Analytics makes the last 31 days of data on this tier available
- Standard: On the standard tier, data is retained for 30 days
- Premium: Data on the premium tier is retained for 365 days
When you use the OMS and Standalone pricing tiers, you can keep up to 2 years' worth of data (730 days). This is configurable from the Log Analytics Workspace settings in the Azure Portal. There is, however, a retention charge for data stored for more than the default 30 days.