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Just lately, Google introduced preview assist for event-driven migration capabilities for Storage Switch Service (STS), which permits customers emigrate knowledge from AWS S3 to Cloud Storage and duplicate knowledge between a number of Cloud Storage buckets.

STS is a service in Google Cloud that enables customers to shortly and securely transfer knowledge between objects and file storage between Google Cloud, Amazon, Azure, on-premise and different storage options. As well as, the service now features a preview functionality to robotically migrate knowledge that has been added or up to date on the supply based mostly on occasion notifications. One of these switch is event-driven, the place the service listens for occasion notifications to provoke knowledge switch. At the moment, these event-driven migrations are supported from AWS S3 or Cloud Storage to Cloud Storage.

In a Google Cloud weblog submit, authors Ajitesh Abhishekproduct supervisor and software program engineer Anup Talwalkar, who each work at Google Cloud, clarify:

To carry out event-driven migration, STS depends on Pubsub and SQS. Purchasers should arrange the occasion notification and grant STS entry to this queue. Utilizing a brand new discipline – “Occasion Stream” – within the switch operate, purchasers can specify the title of the occasion stream and management when STS begins and stops listening for occasions from this stream.

STS begins consuming the protest change notifications from the supply as quickly because the migration job is created. Each add or change to an object now leads to a change notification, which the service makes use of to maneuver the item to its vacation spot in actual time.


The brand new STS functionality gives a number of benefits. Aman Puri, a guide at Google Cloud, explains the advantages in a Medium weblog submit:

As a result of event-driven migrations pay attention for adjustments to the supply library, updates are replicated to the vacation spot in close to real-time. Because of this, the storage migration service doesn’t have to carry out an inventory operation in opposition to the supply, saving money and time.

Use instances embody:

Occasion-driven evaluation: Copy knowledge from AWS to Cloud Storage to carry out evaluation and processing.
Cloud Storage backup: Allow computerized, asynchronous replication of objects between Cloud Storage buckets.
DR/HA set up: Copy objects from supply to backup so as of minutes.
Dwell efficiency: Occasion-driven migration can drive low-downtime migrations, on the order of minutes of downtime, as a follow-up to a single batch migration.

Microsoft gives related capabilities in Azure with the Occasion Grid Service, which permits event-driven knowledge switch from a storage container to numerous locations. By leveraging a system theme on the storage and subscribing to blobCreated occasions by way of an Azure Operate, knowledge may be copied from the storage container to a vacation spot equivalent to one other storage container, an AWS S3 bucket, or a Google Cloud bucket. Alternatively, an occasion might set off a DataFactory pipeline.

Occasion-driven functionality is at present accessible in varied Google Cloud areas, and STS pricing data is accessible on the pricing web page.

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