InCloud computing scaleis notalimit. So thereare very large-scale databasesavailablefromcloud providers. Some oftheseare:
I. AmazonDynamoDB :AmazonWeb Services (AWS) providesa NoSQLweb servicecalled DynamoDBthat provides highly
availableand partition tolerant databasesystem. It hasa multi-master design. It uses synchronous replication across multiple
datacenters. Wecan easily integrateit withMapReduceand Elastic MapReduce ofAWS.
II. Google Bigtable :This isa very large-scale high performancecloud based database option fromGoogle. It isavailable onGoogle
Cloud. Itcan bescaled to peta bytes. It isa Google proprietary implementation. InBigtable, two arbitrary string values, rowkey
and column key,and timestamp are mapped to an arbitrary bytearray. InBigtable MapReducealgorithmis used for modifying and
generating the data.
III. Microsoft Azure SQLDatabase :Microsoft Azure providescloud based SQL databasethatcan bescaled very easily for
increased demand. It has very good security featuresand itcan beeven used to build multi-tenantapps to service multiple
customers in cloud.
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