What are the methods to share data among parallel instances in cloud computing ?
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How can one increment global counters across instances in a cloud environment? Since the cloud creates parallel instances of the application how can the instances share any global variables across instances?
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Answer:
if you're using AWS then SQS [1] and SNS [2] can be used for that purpose [1] http://aws.amazon.com/sqs/ [2] http://aws.amazon.com/sns/
Marin Dimitrov at Quora Visit the source
Other answers
At your application layer, you could use a caching system like memcached (http://memcached.org/) or redis (http://redis.io/). Your application running on each instance would access the same cache (which would also be running on one or more instances). Both memcached and redis can themselves be setup as a cluster as well.
Ankit Agarwal
Assuming proper SOA, you have a number of options. Stateful utility services, stateful service grids, and distributed out-of-process caches are all high-performance options, or components, to consider when sharing data.
Andy Badera
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