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A response of `Created Successfully!` indicates the function is deployed and ready to accept messages.
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If the response is `402 Payment Required` with `Reason: only qualified organizations can create functions`, then you must upgrade to a xref:operations:astream-pricing.adoc[paid {product} plan].
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If the response is `402 Payment Required` with `Reason: only qualified organizations can create functions`, then you must upgrade to a xref:operations:astream-pricing.adoc[paid {product-short} plan].
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Organizations on the *Free* plan can use xref:streaming-learning:functions:index.adoc[transform functions] only.
Copy file name to clipboardExpand all lines: modules/operations/pages/astream-limits.adoc
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{product} includes guardrails and limits to ensure best practices, foster availability, and promote optimal configurations for your databases.
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Unless otherwise noted, the following limits apply to shared clusters.
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In general, xref:operations:astream-pricing.adoc#dedicated-clusters[dedicated clusters] have more relaxed limits than shared clusters, and some limits can be changed by contacting {support_url}[{company} Support].
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In general, xref:operations:astream-pricing.adoc#dedicated-clusters[Streaming Capacity Units] have more relaxed limits than shared clusters, and some limits can be changed by contacting {support_url}[{company} Support].
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== {product} guardrails
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Guardrails are provisioned in the default settings for {product}.
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You can't directly change these guardrails.
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For dedicated clusters, some guardrails can be changed by contacting {support_url}[{company} Support].
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For Streaming Capacity Units, some guardrails can be changed by contacting {support_url}[{company} Support].
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[cols="1,1,1"]
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|===
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|Number of tenants per organization
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a|
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* Shared clusters: 10
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* Dedicated clusters: Unlimited
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* Streaming Capacity Units: Unlimited
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|This limit can't be changed for shared clusters.
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|Number of topics per namespace
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a|
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* Shared clusters: 100
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* Dedicated clusters: 5000
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* Streaming Capacity Units: 5000
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|
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|Max message size
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a|
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* Shared clusters: 5MB
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* Dedicated clusters: Customizable
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* Streaming Capacity Units: Customizable
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|
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|Max throughput per topic for consumers
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a|
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* Shared clusters: 5000 messages per second, 25MB per second
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* Dedicated clusters: Customizable
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* Streaming Capacity Units: Customizable
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|This limit applies to non-partitioned topics and individual partitions of partitioned topics.
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|Max throughput per topic for producers
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a|
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* Shared clusters: 5000 messages per second, 25MB per second
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* Dedicated clusters: Customizable
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* Streaming Capacity Units: Customizable
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|This limit applies to non-partitioned topics and individual partitions of partitioned topics, regardless of the number of producers to a topic.
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If there are multiple producers to a topic, they can produce a _combined maximum_ of 5000 messages per second.
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|Max throughput per topic for subscriptions
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a|
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* Shared clusters: 5000 messages per second, 25MB per second
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* Dedicated clusters: Customizable
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* Streaming Capacity Units: Customizable
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|This limit applies to non-partitioned topics and individual partitions of partitioned topics, regardless of the number of subscribers to a topic.
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If there are multiple subscriptions to a topic, they can dispatch a _combined maximum_ of 5000 messages per second.
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|Number of producers per topic
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a|
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* Shared clusters: 50
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* Dedicated clusters: 500
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* Streaming Capacity Units: 500
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|
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|Number of consumers per topic
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a|
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* Shared clusters: 50
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* Dedicated clusters: 500
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* Streaming Capacity Units: 500
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|
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|Number of subscriptions per topic
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a|
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* Shared clusters: 50
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* Dedicated clusters: 500
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* Streaming Capacity Units: 500
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|
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|Max unacknowledged messages per consumer
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|===
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|Cluster type |CPU per instance |RAM per instance |Maximum function instances per namespace
Copy file name to clipboardExpand all lines: modules/operations/pages/astream-pricing.adoc
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{product} is a fully-managed, software-as-a-service (SaaS) offering embedded in {astra-db}.
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{product} offers three subscription plans, as well as pricing for dedicated clusters.
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An {product} subscription is associated with an {astra-db} organization, but {product} subscription plans are separate from {astra-db} organization subscription plans.
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{product-short} offers three subscription plans with options for {product}, as well as pricing for Streaming Capacity Units.
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//An {product} subscription is associated with an {astra-db} organization, but {product} subscription plans are separate from {astra-db} organization subscription plans.
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For {product} plans and pricing details, see https://www.datastax.com/pricing/astra-streaming[{product} pricing].
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For information about {astra-db} plans, billing, and usage, see xref:astra-db-serverless:administration:subscription-plans.adoc[].
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For {product-short} plans and pricing details, see https://www.datastax.com/pricing?product=astra-db[{product-short} pricing] and xref:astra-db-serverless:administration:subscription-plans.adoc[].
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== {product} subscription plans
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== {product}availability by subscription plan
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{product} subscription plans include *Free*, *Pay As You Go*, and *Annual*.
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The availability of {product} features depends on your {product-short} subscription plan.
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The *Free* plan allows only one topic.
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It is meant for evaluation before upgrading to a paid plan.
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*Pay As You Go* and *Annual* plans realize the benefits of fully-managed SaaS offerings: You only pay for the resources you use to produce, process, and consume messages.
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*Pay As You Go* and *Enterprise* plans can realize the benefits of fully-managed SaaS offerings.
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You only pay for the resources you use to produce, process, and consume messages.
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These plans require a payment method on file.
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For metering details, see see https://www.datastax.com/pricing/astra-streaming[{product} pricing].
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For {product} metering details, contact your {company} account representative or {support_url}[{company} Support].
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By default, {product} plans use secure, shared {pulsar-reg} clusters.
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== Shared clusters
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By default, {product} uses secure, shared {pulsar-reg} clusters.
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Your data and interaction with {pulsar-short} are secured over a public internet connection.
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If desired, you can opt in to <<dedicated-clusters,dedicated clusters>>.
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If desired, you can opt in to <<dedicated-clusters,Streaming Capacity Units>>.
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[#dedicated-clusters]
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== Dedicated clusters
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== Streaming Capacity Units
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[TIP]
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====
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Streaming Capacity Units are also known as _dedicated clusters_.
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====
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If you prefer not to use shared clusters, you can opt for dedicated clusters.
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If you prefer not to use shared clusters, you can opt for Streaming Capacity Units.
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With dedicated clusters, you have your own private {pulsar-short} cluster with all the benefits of {product} as a managed service.
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With Streaming Capacity Units, you have your own private {pulsar-short} cluster with all the benefits of {product} as a managed service.
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You sign in to {astra-db} and use {product} in the same way that you would on shared clusters.
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When you create a tenant, you have the option to deploy to your private cluster.
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This means that you can use both shared or dedicated clusters, depending on your tenants' use cases.
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This means that you can use both shared clusters and Streaming Capacity Units, depending on your tenants' use cases.
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Dedicated clusters are an addition to your base {product} subscription plan, and billing for dedicated clusters is unique to each customer.
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For information about dedicated cluster pricing and metering, see https://www.datastax.com/astra-streaming-dedicated-clusters[{product} Dedicated Clusters pricing].
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Streaming Capacity Units are an addition to your base {product} subscription plan, and billing for Streaming Capacity Units is unique to each customer.
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For information about Streaming Capacity Unit pricing and metering, see https://www.datastax.com/astra-streaming-dedicated-clusters[{product-short} Streaming Capacity Units pricing].
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Like shared clusters, all connections for dedicated clusters in {product} are guarded by authentication, authorization, and secure (TLS) communications.
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Like shared clusters, all connections for Streaming Capacity Units in {product} are guarded by authentication, authorization, and secure (TLS) communications.
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By default, these connections are over the public internet.
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Additionally, dedicated clusters support xref:operations:private-connectivity.adoc[private connectivity].
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Additionally, Streaming Capacity Units support xref:operations:private-connectivity.adoc[private connectivity].
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== Additional billed charges
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Regardless of your subscription plan or cluster type, {product} applies xref:astream-limits.adoc[guardrails and limits] on resource creation to ensure best practices, foster availability, and promote optimal configurations for your databases.
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Dedicated clusters have fewer limits than shared clusters.
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Streaming Capacity Units have fewer limits than shared clusters.
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== Regions
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With shared clusters, you can create tenants in any of the xref:astream-regions.adoc[supported regions].
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Dedicated clusters are open to almost any public cloud region.
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For this reason, dedicated clusters offer more flexibility for xref:operations:astream-georeplication.adoc[geo-replication].
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Streaming Capacity Units are open to almost any public cloud region.
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For this reason, Streaming Capacity Units offer more flexibility for xref:operations:astream-georeplication.adoc[geo-replication].
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If your preferred region isn't already available, you can contact your {company} account representative or {support_url}[{company} Support] to request it.
Copy file name to clipboardExpand all lines: modules/operations/pages/private-connectivity.adoc
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The first inbound traffic pattern describes {pulsar-reg}, Apache Kafka(R), and RabbitMQ messaging traffic, as well as Prometheus metrics traffic, flowing from a user's private endpoint to {product}.
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You create a connection to the {company} private link service, and then {company} routes traffic to your {product} dedicated cluster.
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You create a connection to the {company} private link service, and then {company} routes traffic to your {product} Streaming Capacity Units.
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If you have multiple tenants, they can have different VPCs.
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Each VPC will have the same private FQDN with different VNETs.
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The traffic on separate private end point connections is isolated until it reaches the {company} load balancer.
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