1. Added both options for measuring space usage using total accounts usage and for individual store shrink ratio using an enum. Validator CLI options: --accounts-shrink-optimize-total-space and --accounts-shrink-ratio
2. Added code for selecting candidates based on total usage in a separate function select_candidates_by_total_usage
3. Added unit tests for the new functions added
4. The default implementations is kept at 0.8 shrink ratio with --accounts-shrink-optimize-total-space set to true
Fixes#17544
Refactor a few functions that are on the load-from-snapshot path, to facilitate
adding in incremental snapshots more easily.
Additionally, add some tests and doc comments.
* Add BlockHeight CF to blockstore
* Rename CacheBlockTimeService to be more general
* Cache block-height using service
* Fixup previous proto mishandling
* Add block_height to block structs
* Add block-height to solana block
* Fallback to BankForks if block time or block height are not yet written to Blockstore
* Add docs
* Review comments
* Require that blockstore block-time only be recognized slot, instead of root
* Move cache_block_time to after Bank freeze
* Single use statement
* Pass transaction_status_sender by reference
* Remove unnecessary slot-existence check before caching block time altogether
* Move block-time existence check into Blockstore::cache_block_time, Blockstore no longer needed in blockstore_processor helper
* Adds a CLI option to the validator to enable just-in-time compilation of BPF.
* Refactoring to use bpf_loader_program instead of feature_set to pass JIT flag from the validator CLI to the executor.
* Switch AccountsIndex.account_maps from HashMap to BTreeMap
* Introduce eager rent collection
* Start to add tests
* Avoid too short eager rent collection cycles
* Add more tests
* Add more tests...
* Refacotr!!!!!!
* Refactoring follow up
* More tiny cleanups
* Don't rewrite 0-lamport accounts to be deterministic
* Refactor a bit
* Do hard fork, restore tests, and perf. mitigation
* Fix build...
* Refactor and add switch over for testnet (TdS)
* Use to_be_bytes
* cleanup
* More tiny cleanup
* Rebase cleanup
* Set Bank::genesis_hash when resuming from snapshot
* Reorder fns and clean ups
* Better naming and commenting
* Yet more naming clarifications
* Make prefix width strictly uniform for 2-base partition_count
* Fix typo...
* Revert cluster-dependent gate
* kick ci?
* kick ci?
* kick ci?
* Consolidate entry tick verification into one function
* Mark bad slots as dead in blocktree processor
* more feedback
* Add bank.is_complete
* feedback