Oracle Coherence vs. Quest Migration Manager & Migrator

Oracle Coherence can be used to solve latency problems by caching data near the application tier. In-memory performance helps to reduce data contention, thus improving application response time. Oracle Coherence does a great job at scaling linearly and can do so dynamically. Oracle Coherence can replicate data so it can be part of a disaster recovery solution. One thing that is often overlooked with elastic caches is their ability to analyze data in memory, leveraging the processing power of the data grid. This is something Oracle Coherence does exceptionally well. Oracle Coherence also provided event handling capabilities to allow applications to respond to events triggered by transactions.

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Dell ChangeBASE is well suited in migrating an OS to a new version, or 32/64-bit. It's also helpful when virtualizating workstations into Thin Clients for use with Citrix or other thin provisioning services.

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• Performance. Superfast resolution of complex data grid queries.
• Reliability. Availability domain support for disaster recovery.
• Programming model. Frictionless API for use with Java 8.

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• OS Patch Testing - We further used this to test Microsoft's Patch Tuesday releases before we put them in production.
• Web Dashboard - The latest version added a fully customization dashboard with widgets to give you an at-a-glance view.
• Application comparability - We used this to test our Windows XP to Windows 7 migration.

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• I can't really come up with too many flaws, but possibly a bit expensive considering there are good open source caches like Ehcache.

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• Initial setup can be tricky - We needed to contact support for some help.
• Prior to the latest version, there wasn't an easy way to view all of our results. The new dashboard has rectified this.

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Oracle Coherence support team is responsive and knowledgeable. We contacted them to ask a couple of design questions about how we were setting up Oracle Coherence based on how we used IBM's Datapower Extreme Scale. They were able to guide us so that we got the design correct the first time and didn't have to go back and re-architect our design later.

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DataSynapse GridServer has the same cache functionality connected with a grid distributed application deployment platform. It provides all the necessary tools to configure and manage these applications. On the otherhand Oracle Coherence has more a flexible configuration and better performance. Also the Oracle configuration and monitoring tools are more convenient and informative than the DataSynapse ones.

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Dell ChangeBASE is more costly when compared to Admin Studio, I believe the price was almost double. However, Admin Studio did not provide a comfortable level of support and we felt we were in better hands with Dell's patching schedule. Admin Studio wasn't able to answer our question on when they released software updates and how complex an upgrade would be.

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• In my current project, it is yet to be decided as we are on the way to make it live for users. But I am sure it will be an added value to obtain timely calculations.

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• ROI was seen after 10 months of use.
• Greatly sped up the application testing process by several weeks, and allowed our existing development team to continue working on other projects.

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