About comparison

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Vs. EHCache

Hi, I realize this is kind of like an apples vs. oranges comparison, but I would be interested if you have any performance information vs. something like ehcache with a persistent store. I'm currently evaluating for a simple schema to persist only 1 or 2 types of entities (but possibly 10k-100k
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in-memory and on-disk support?

. See for example comparison of RAM drives, including against a regular hard disk. Notice
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[ODB1] Chapter 7 - JDOQL Queries

a candidate object in other operations, such as method calls and comparison expressions. Fields Persistent ... fields can participate in queries in combination with comparison expressions, as in "this.age >= 18 ... expression (for example, when the || operator is used). Operators Comparison operators Comparison
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[ODB1] Chapter 4 - JDO Metadata

of persistent objects for every value in the indexed field. Both equality (==, !=) and comparison