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Andrey Fomichev edited this page May 29, 2022 · 20 revisions

Below is the list of tasks that are good for student projects (course or graduate work).

SDK

Support for Coordination service in Go SDK

YDB has a Coordination Service which allow your client application to elect a leader via distributed lock (similar to ZooKeeper). The task is to add support for Coordination Service to Go SDK.

Mentor: Aleksei Miasnikov

Support for sqlx.StructScan() in Go SDK

Add support for sqlx.StructScan() from github.com/jmoiron/sqlx to Go SDK.

Mentor: Aleksei Miasnikov

Implement Plugin Mechanism in C++ SDK

Add capability of loading plugins implemented via so/dll into C++ SDK.

Example: YDB supports different authorisation mechanisms, it's a good idea to implement them as plugins to keep code dependancies clear.

Mentor:Daniil Cherednik

Extend C++ SDK Monitoring

Out of the box monitoring for you client application is awesome. We have some ideas how to extend C++ SDK Monitoring facilities.

TODO: detailed description

Mentor:Daniil Cherednik

Safe Shutdown in C++ SDK

TODO: detailed description

Mentor:Daniil Cherednik

YDB CLI (Command Line Interface)

Implement Interactive CLI

Currently YDB CLI (https://ydb.tech/en/docs/getting_started/cli) doesn't support interactive mode. Interactive mode means that you can run the ydb program and it will provide you a way to write queries and get responses something like the psql program does.

Mentor: Nikolay Perfilov

Extend ydb import file Capabilities

TODO: detailed description

YDB Core (C++)

Optimize TEvVPut/TEvVGet message serialization

If you want to dive into YDB's core, this is the task you are looking for. Writing and reading from/to YDB Distributed Storage (DS) effectively is very important. For every write to DS YDB's component dsproxy generates several messages TEvVPut (https://github.com/ydb-platform/ydb/blob/main/ydb/core/blobstorage/vdisk/common/vdisk_events.h#L504) because we write multiple replicas or erasure parts. TEvVPut message is serialised to go into the wire. The task is to optimize TEvVPut serialization. Currently we use Google protobuf for message serialization, but options are:

  1. Use google protobuf for metadata serialization only, but don't put opaque data into proto message. Put it next after protobuf message;
  2. Use flat buffers;
  3. Use custom protocol. We expect that you think propose some solutions, implement them and compare performance via benchmark.

Mentor: Aleksey Stankevichus

Add Traces to YDB Core

YDB uses lwtrace library for tracing events in the system and to debug issues.

TODO: 1. add traces to components; 2. add support for open telemetry.

Mentor: Aleksey Stankevichus

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