[Tiered Caching][Milestone 1] Integrate disk cache

[sgup432]

Is your feature request related to a problem? Please describe

This is part of overall Tiered caching miletone 1 - #10870

As part of this, we want to integrate a disk cache which will extend the existing in-memory cache and be provided under the overall tiered cache option. Below are the requirements for that:

• We need an embedded cache library in JAVA.
• Cache should have disk tier support.
• Robust, performant, full proven and widely adopted.
• Opensource (preferably Apache v2 license).

There are the possibly three options we have fulfilling above requires:

1. JCS
2. Ehcache
3. MapDb - (Don't see much active development from the past year, so will skip)

We are going with Ehcache in phase-1 as it is more widely adopted, has a better community support and we already have some experience with it as we did POCs with it.

Describe the solution you'd like

As described above, we are integrating ehcache as a disk cache option.

Related component

Search:Performance

Describe alternatives you've considered

No response

Additional context

No response

[peternied]

[Triage - attendees 1 2 3 4]
Thanks for filing