Amazon OpenSearch Service Pricing

Let’s say you are new to Amazon OpenSearch Service and are creating a domain in the US-East (N. Virginia) region. You are testing the service with three t3.small.search instances and 15 GB storage in each instance. You are using Amazon EBS General Purpose SSD (gp2) volumes as your preferred storage option. Amazon OpenSearch Service provides free usage of up to 750 hours per month of a t2.small.search or t3.small.search instance, with 10 GB of EBS storage. Considering a month’s usage, the three instances on your domain would run for 730 hours each, totaling 2,190 hours of usage. Minus 750 hours of free usage, you will be charged for 1,440 instance hours, which amounts to $51.84 for the month (see calculations in the table below). Similarly, for EBS, your three instances put together will have 45 GB of EBS storage. Minus 10 GB of free storage, you will be charged for 35 GB, which amounts to $4.725 for the month. Your total cost for the month is $56.67.

Please see below for a breakdown of the monthly costs (USD) you are likely to incur when free tier is still applicable. 

Let’s say you are creating a new production-grade domain with three Availability Zones in the US East (N. Virginia) region with the following configuration: three data nodes of type r6g.xlarge.search with 500 GB EBS storage (General Purpose SSD) each, three cluster manager nodes of type c6g.large.search, and two UltraWarm nodes of type ultrawarm1.medium.search with 1.5 TB storage each. In one month, the eight instances on your domain (three data nodes, three cluster manager nodes, and two UltraWarm nodes) will run for 730 hours each, totaling 5,840 instance hours. Based on the price of these individual instance types, your total cost for instance hours is $1,328.60. Your total storage cost for the month includes the cost of EBS storage for the three data nodes and the cost of storage for the UltraWarm nodes. With 500 GB EBS storage on each of the three instances, you will be charged for 1,500 GB at $0.135 per GB per month, which amounts to an EBS storage cost of $202.50 for the month. For storage for the two UltraWarm nodes, you will be charged for 3 TB (1.5 TB per instance), which amounts to $73.728 (at $0.024 per GB per month). 

Please see below for a breakdown of the monthly costs (USD) you are likely to incur.

Amazon OpenSearch Service does not charge for Multi-AZ with Standby.

Scenario 1: Customer has a well configured domain with 3 cluster manager nodes, 6 data nodes and 3 copies of data. They will not see any impact of moving their domain to Multi-AZ with Standby. The before and after cost is the same.

Scenario 2: Customer has a domain that is undersized (more than 60% CPU or RAM utilisation) cluster manager. The customer will need to update their cluster manager node instance type before enabling Multi-AZ with Standby. In this case, for 10-20 data nodes, they need to use an instance type of c5.xlarge.search or above. Due to the change in cluster manager node size the customer will see some increase in cost as Multi-AZ with Standby enforces these best practices.

Scenario 3: Customer has a domain that follows old best practices and guidelines, thus has 2-copies of data (1 primary and 1 replica) and storage utilization is above 70%. Enabling Multi-AZ with Standby requires at least 3 or multiple of 3 copies of data. To accommodate the additional copy of data the customer would need an additional 40% of storage while still keeping 20% of free disk space. This means an additional 9 data nodes.

*In case the customer uses only 50-60% of the total storage, they would not need to add additional storage for the third copy and hence may not incur additional cost.

From the above examples, customers who follow best practices do not incur additional cost of enabling Multi-AZ with Standby on their domain.

Let’s say you are creating a new production-grade domain with three Availability Zones in the US East (N. Virginia) region with the following configuration: three data nodes of type or1.xlarge.search with 500 GB EBS storage (General Purpose SSD) each, three cluster manager nodes of type c6g.large.search, and three Ultrawarm nodes of type ultrawarm1.medium.search with 1.5 TB storage each. In one month, the nine instances on your domain (three data nodes, three cluster manager nodes, and three Ultrawarm nodes) will run for 720 hours each, totaling 5780 instance hours. Based on the price of these individual instance types, your total cost for instance hours is $1661.04. Your total storage cost for the month includes the cost of EBS storage for the three data nodes, local storage and the cost of storage for managed storage which is $292.728. With 500 GB EBS storage on each of the three instances, you will be charged for 1,500 GB at $0.122 per GB per month, which amounts to an EBS storage cost of $183.0 for the month. As data is written synchronously to Amazon S3 In the remote store, you will be charged for 1,500 GB at $0.024 per GB per month, which amounts to $36.0 For storage for the three Ultrawarm nodes, you will be charged for 3 TB (1.5 TB per instance), which amounts to $73.728 (at $0.024 per GB per month). 

Please see below for a breakdown of the monthly costs (USD) you are likely to incur.

OpenSearch Service Direct Query - Querying Amazon S3

Let’s say you have an Amazon OpenSearch Service domain already setup in the US-East (N. Virginia) region and you created a new Direct Query data source using Amazon S3 to query to your VPC flow logs. You refer to your run book to kick off a series of queries which in its entirety use 2 OCU-hours to complete. You would be billed 2 OCUs * 0.24 OCU-hours * 24 hours/day = $11.52 / day to maintain your index for faster query performance.

OpenSearch Service Direct Query - Acceleration with Amazon S3

Let’s say you have an Amazon OpenSearch Service domain already setup in the US-East (N. Virginia) region and you have created a new Direct Query data source using Amazon S3 to query to your S3 Logs. You want to tune query performance so that your queries complete faster. You enable a materialized view on your S3 Logs table in AWS Glue Data Catalog when setting up the data source which runs every hour and uses 2 OCU-hours each time it runs. You would be billed 2 * 0.24 OCU-hours * 24 hours/day = $11.52 / day to maintain your index for faster query performance.

Running an OpenSearch Dashboard from either OpenSearch UI or CloudWatch Logs

Let's say you installed an the out-of-the-box VPC Flow log dashboard within the CloudWatch Logs console which ingested 1440 GB of data per month. In addition to your typical CloudWatch Logs costs to ingest and store the data, you would also see the following charges on your bill:

OpenSearch pricing depends on OpenSearch Compute Units (OCUs) used for query, indexing, and storage. No. of OCUs used depend on your data ingestion size as well as query frequency.

Direct Query:
OCUs used to query your data in CloudWatch Logs and move it to an OpenSearch Service collection to build the dashboard

• Uses .5 OCU-hours per query for 2m per hour * 730 hours per month * .5 * 2/60 * 730 * $0.24 per OCU-hour = $3 per month

To indexed the data into the OpenSearch Service collection using OpenSearch

• Uses IndexingOCUs 2 OCU-hours per hour * 730 hours per month * $0.24 per OCU-hour = $350 per month

To store the data in the OpenSearch Service collection

• Uses StorageUsed You ingest 1440 GB of data into the collection per month, which incurs a charge of $0.02 per GB per month = $29 per month

You search and filter your VPC Flow dashboard

• Uses SearchOCUs 1 OCUs * $0.24 per OCU per hour * 730 hours = $350 per month

The total monthly charges = $732

• $3 (Direct Query OCU)
• $350 (Serverless Indexing)
• $29 (Serverless Storage)
• $350 (Serverless Search)

Q: How will I be charged and billed for my use of Amazon OpenSearch Service?

You pay only for what you use, and there are no minimum or setup fees. You are billed based on:

• Amazon OpenSearch Service instance hours – Based on the class (e.g. Standard Small, Large, Extra Large) of the Amazon OpenSearch Service instance consumed. Partial Amazon OpenSearch Service instance hours consumed are billed as full hours.
  
• Storage (per GB per month) – Amazon EBS Storage capacity you have provisioned to your Amazon OpenSearch Service instance. If you scale your provisioned storage capacity within the month, your bill will be pro-rated.
  
• Provisioned IOPS per month – Amazon EBS Provisioned IOPS rate, regardless of IOPS consumed (for Amazon OpenSearch Service Provisioned IOPS (SSD) Storage only).
  
• Data transfer – Regular AWS data transfer charges apply.

Please refer to the Amazon OpenSearch Service pricing page for detailed pricing information.

Q: When does billing of my Amazon OpenSearch Service domain begin and end?

Billing commences for an Amazon OpenSearch Service instance as soon as the instance is available. Billing continues until the Amazon OpenSearch Service instance terminates, which would occur upon deletion or in the event of instance failure.

Q: What defines billable instance hours for Amazon OpenSearch Service?

Amazon OpenSearch Service instance hours are billed for each hour your instance is running in an available state. If you no longer wish to be charged for your Amazon OpenSearch Service instance, you must delete the domain to avoid being billed for additional instance hours. Partial Amazon OpenSearch Service instance hours consumed are billed as full hours.

Q: What is a Reserved Instance (RI)?

Amazon OpenSearch Service Reserved Instances give you the option to reserve an instance for a one- or three-year term, and in turn receive significant savings compared to the On-Demand Instance pricing.

Q: How are Reserved Instances different from On-Demand Instances?

Functionally, Reserved Instances and On-Demand Instances are exactly the same. The only difference is how your instance(s) are billed. With Reserved Instances, you purchase a one- or three-year reservation and receive a lower effective hourly usage rate (compared to On-Demand Instances) for the duration of the term. Unless you purchase Reserved Instances in a Region, all instances in that Region are billed at On-Demand Instance hourly rates.

Q: What are the payment options for Reserved Instances?

Three options are available:

• No Upfront Reserved Instances (NURI) – NURIs offer significant savings compared to On-Demand Instance prices. You pay nothing upfront, but commit to paying for the Reserved Instance over the course of the one- or three-year term.
• Partial Upfront Reserved Instances (PURI) – PURIs offer higher savings than NURIs. You pay for a portion of the total cost upfront, and the remainder over the course of the term. This option balances payments between upfront and hourly.
• All Upfront Reserved Instances (AURI) – AURIs offer the highest savings of all of the Reserved Instance payment options. You pay for the entire reservation with one upfront payment, and pay nothing on an hourly basis.
  

Q: How do I purchase Reserved Instances?

You purchase Reserved Instances in the "Reserved Instance" section of the AWS Management Console for Amazon OpenSearch Service. Alternatively, you can use the Amazon OpenSearch Service API or AWS Command Line Interface to list and purchase Reserved Instances.

Once you purchase a Reserved Instance, you can use it just like an On-Demand Instance. As long as the purchased reservation is active, Amazon OpenSearch Service applies the reduced hourly rate to it.

Q: Are Reserved Instances specific to an Availability Zone?

Amazon OpenSearch Service Reserved Instances are purchased for a Region rather than for a specific Availability Zone. After you purchase a Reserved Instance for a Region, the discount applies to matching usage in any Availability Zone within that Region.

Q: How many Reserved Instances can I purchase?

You can procure up to 100 Reserved Instances in a single purchase. If you need more Reserved Instances, you need to place more purchase requests.

Q: Do Reserved Instances include a capacity reservation?

Amazon OpenSearch Service Reserved Instances are purchased for a Region rather than for a specific Availability Zone. Hence, they are not capacity reservations. Even if capacity is limited in one Availability Zone, Reserved Instances can still be purchased in the Region. The discount applies to matching usage in any Availability Zone within that Region.

Q: What if I have an existing On-Demand Instance that I’d like to convert to a Reserved Instance?

Simply purchase a Reserved Instance of the same type as the existing On-Demand Instance. If the Reserved Instance purchase succeeds, Amazon OpenSearch Service automatically applies the new hourly usage charge for the duration of your reservation.

Q: If I sign up for a Reserved Instance, when does the term begin? What happens to my Reserved Instance when the term ends?

Pricing changes and the reservation term associated with your Reserved Instance become active after your request is received and the payment authorization is processed. If the one-time payment (if applicable) or new hourly rate (if applicable) cannot be successfully authorized by the next billing period, the discounted price does not take effect and your term does not begin. You can follow the status of your reservation using the console, API, or CLI. For more details, refer our documentation.

When your Reserved Instance term expires, your Reserved Instance reverts to the appropriate On-Demand Instance hourly usage rate for your instance class and Region.

Q: How do I control which instances are billed at the Reserved Instance rate?

When computing your bill, our system automatically applies your reservation(s) such that all eligible instances are charged at the lower hourly Reserved Instance rate. Amazon OpenSearch Service does not distinguish between On-Demand and Reserved Instances while operating Amazon OpenSearch Service domains.

Q: If I scale my Reserved Instance up or down, what happens to my reservation?

Each Reserved Instance is associated with the instance type and Region that you picked for it. If you change the instance type in the Region where you have the Reserved Instance, you will not receive discounted pricing. You must ensure that your reservation matches the instance type you plan to use. For more details, please refer to Amazon OpenSearch Service Reserved Instance Documentation.

Q: Can I move a Reserved Instance from one Region or Availability Zone to another?

Each Reserved Instance is associated with a specific Region, which is fixed for the lifetime of the reservation and cannot be changed. Each Reserved Instance can, however, be used in any of the Availability Zones within the associated Region.

Q: Are Reserved Instances applicable if use multiple Availability Zones?

A Reserved Instance is for an AWS Region and can be used in any of the Availability Zones in that Region.

Q: Are Reserved Instances available for both cluster manager nodes and Data nodes?

Yes. Amazon OpenSearch Service does not differentiate between cluster manager and Data nodes when applying Reserved Instance discounts.

Q: Can I cancel a Reserved Instance?

No, you cannot cancel your Reserved Instances, and the one-time payment (if applicable) and discounted hourly usage rate (if applicable) are not refundable. Also, you cannot transfer the Reserved Instance to another account. You must pay for every hour during your Reserved Instance’s term, regardless of your usage.

Q: If I purchase a Reserved Instance from a payer (primary) account, is it accessible to all the member accounts?

Yes. Reserved Instance pricing and application follows the policies defined for consolidated billing on AWS. More details can be found here.

Q: If AWS reduces prices of On-Demand Instances for Amazon OpenSearch Service, will the amount I pay for my current Reserved Instances change?

No. The price you pay for already-purchased Reserved Instances does not change for the term of the reservation.

Q: Can I sell my Reserved Instances on the Reserved Instance Marketplace?

No. Reserved Instances purchased on Amazon OpenSearch Service cannot be sold on the Reserved Instance Marketplace.

Q: Are volume discounts available for Reserved Instance purchase?

No. We do not offer volume discounts for Amazon OpenSearch Service Reserved Instances.