Hi Rishabh Tiwari,
Thank you for posting query in Microsoft Q&A Platform.
The cost of using Stream Analytics to capture data in Parquet format from Azure Event Hubs depends on the pricing tier you choose for Stream Analytics. Stream Analytics offers two pricing tiers: Standard and Premium.
If you choose the Standard pricing tier, you will be charged based on the number of Streaming Units (SUs) you provision. The cost of using Stream Analytics in the Standard pricing tier is $0.034 per SU per hour. You can provision up to 200 SUs in the Standard pricing tier.
If you choose the Premium pricing tier, you will be charged based on the number of SUs you provision and the amount of data processed. The cost of using Stream Analytics in the Premium pricing tier is $0.68 per SU per hour plus $0.034 per million events processed. You can provision up to 100 SUs in the Premium pricing tier.
Regardless of which pricing tier you choose, the cost of using Stream Analytics to capture data in Parquet format from Azure Event Hubs is in addition to the cost of using Event Hubs capture. The cost of using Event Hubs capture is $73 per TU per month in the US East region.
So, to summarize, if you are using Stream Analytics to capture data in Parquet format from Azure Event Hubs, you will be charged for both the Event Hubs capture and the Stream Analytics usage. The cost of Stream Analytics usage depends on the pricing tier you choose.