Riki Otaki

Add journal-style log storage to optuna

2

## Motivation Introduce **JournalStorage** to optuna. Journal storage writes a record of every operation to the database as it is executed and at the same time, keeps a latest snapshot...

## Motivation Fix docstring in `FrozenTrial`. ## Description of the changes Added docstring for `distributions`, `system_attrs`, and `trial_id` for `FrozenTrial`.

Refine docs in `BaseStorage`

1

### What is an issue? ## Motivation Some paragraphs in the `BaseStorage` class seem to be misleading for those who implement custom storages on `BaseStorage` due to some reasons described...

There are a few ways to implement YCSB in transactional systems. 1. Read, Update, RMW are executed separately on different transactions and the portion of each transaction is decided by...

There are too many protocols and benchmarks right now that it is hard to test before pushing it. Need to set up a CI as soon as possible,

https://github.com/wattlebirdaz/tpcc-runner/blob/fdfc8f0759705e7a95989557fe6837842af44871/protocols/nowait/include/nowait.hpp#L68-L135 Unlocking the next-key in insert operation causes unlocking of read-lock if a read to the next-key precedes the insert. To fix this, a method to downgrade locks from W->R...

https://github.com/wattlebirdaz/tpcc-runner/blob/4730c4c1476349dcada8f5f985764b86971d432e/protocols/nowait/include/nowait.hpp#L101-L105 For safety reasons, use the constructor for initializing allocated memory. (`Object* obj = new (mem_addr) Object (args)`)

Implement rollback in the pre-commit phase using Resource Acquisition Is Initialization (RAII) might be better to avoid redundant code. ``` struct Rollback { Rollback(MVTO* self) : self(self) {} ~Rollback() {...