Andrii Lomakin

### OrientDB Version: 3.2.x OStorageRemoteAsyncOperationTest.testAsyncRead/testSyncCall tests are failing with the exception: ``` \[INFO\] Running com.orientechnologies.orient.client.remote.OStorageRemoteAsyncOperationTest Apr 01, 2022 10:44:24 AM com.orientechnologies.common.log.OLogManager log INFO: Detected limit of amount of simultaneously open...

Hello, As far as I know, Microsoft has filled several patents based on Bw-Tree research papers. My question is why the usage of OpentBWTree does not break those patents or...

Provide ability to pass ownership of buffer during read/write file operations + registration inside io_uring

3

I am using gloomio in a disk cache (which is part of a bigger database project) which provides the possibility to load pages from the disk, keep them inside of...

Implemeantion of write_all/read_exact in DMA/Buffered file

11

Hi, I am the only beginner in this area, but as far as I understand write/read calls of the file implementations can write/read provided data only partially (I suppose behaviour...

Implementation of sequences is highly unstable and leads to situations when tests constantly fail. We need to implement it; in the current state, sequence implementation is merely unusable.

The usage of JFR provides integration with different monitoring tools, including open telemetry. Which is a de facto monitoring tool for the cloud.

Provide API to convert all lighweight edges into regular edges

1

Because lightweight edges have been prohibited since 4.0, we need to create a tool for users (likely SQL command, which will temporarily exist until the 5.0 version) to convert all...

Resole all reported compiler warnings

1

Resolve all existing compiler warnings and fail build in case of the presence of new ones.

High-level algorithm https://ordinary-mine-bbc.notion.site/Implementation-of-the-serializable-level-of-isolation-in-the-OrientDB-algorithm-a29343931a3c430aa4985ac2ad893caa?pvs=4 Implementation details are coming. ---------------------------------------------------------------------------------------------------------------------------------------- Links: Serializable Isolation for Snapshot Databases https://courses.cs.washington.edu/courses/cse444/08au/544M/READING-LIST/fekete-sigmod2008.pdf The Serial Safety Net: Efficient Concurrency Control on Modern Hardware https://event.cwi.nl/damon2015/papers/damon15-wang.pdf Efficiently making (almost) any...

OrientDB essentially gathers write set under four HashMaps: ``` protected Map updatedRids = new HashMap(); protected Map allEntries = new LinkedHashMap(); protected Map indexEntries = new LinkedHashMap(); protected Map recordIndexOperations...