If I’m not mistaken Apache Ignite is in memory.
Here elasticsearch has to read from disk.
yes, if i increase elasticsearch node, is it improve performance.
yes ignite itself putting data in RAM but how could I make elasticsearch to behave like ignite means storing data in memory.
You can may be create a RAM disk?
But it's definitely not recommended.
If you have a small enough data volume that all the data files can fit in the operating system page cache the data is effectively cached in memory.
Yeah but he wants it to be fast on the first read as far as I understand. So data is not yet in cache. 
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ri8!!!!
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