Implement RocksDB compatibility test in Python

[glyh]

To run this test

• Run install-rocksdb.sh (preferably in a docker because it installs to system library) to ensure rocksdb dyn lib are installed
• Run test.py inside a venv where everything in requirements.txt is installed

[dkijania]

why 10?

[glyh]

It's just a random number, I can add it to params.

[dkijania]

NIT: Ugly count += 1. looks like count is not used further in the script. we can replace while with:

for _ in range(10):
    if not rocksdb.rocksdb_iter_valid(iter_):
        break

[dkijania]

NIT: This looks like a perfect use case for contextmanager:

  from contextlib import contextmanager

@contextmanager
def open_db(path, options):
    db = rocksdb.rocksdb_open(options, path.encode())
    try:
        yield db
    finally:
        rocksdb.rocksdb_close(db)

@contextmanager
def read_iter(db):
    ropts = rocksdb.rocksdb_readoptions_create()
    iter_ = rocksdb.rocksdb_create_iterator(db, ropts)
    try:
        yield iter_
    finally:
        rocksdb.rocksdb_iter_destroy(iter_)
        rocksdb.rocksdb_readoptions_destroy(ropts)

[dkijania]

Please consider moving everything from buildkite to scripts folder. Usually we put to buildkite folder stuff which is dependent on buildkite. Looks like it is not a case here

[glyh]

This should better be a generator, I think. Should leave as a follow-up.

BTW, the reason I'm hand-rolling a binding is because other existing libraries is not using dynamic linking.

[glyh]

Superceded by #17957