[IGNITE-19970] Java thin 3.0: Combine hashing with serialization

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: 3.0.0-beta1
• Fix Version/s: 3.1
• Component/s: thin client
• Labels: ignite-3 perfomance
• Epic Link: AI3 Performance
• Ignite Flags: Docs Required, Release Notes Required

Language

Java

• Assignee: Pavel Tupitsyn
• Reporter: Pavel Tupitsyn
• Created: 13/Jul/23 06:31
• Updated: 04/Sep/24 16:29

Description

Currently, we calculate colocation hash separately (see ClientTable.doSchemaOutInOpAsync), and then serialize the data into BinaryTuple.

This causes double work:

• Extract columns from the user-provided object (POJO or Tuple)
• Extract value bytes (for some types like strings) - expensive and allocates an array

Instead, we can calculate the colocation hash while serializing the data into a BinaryTuple, like the C# client does.

Issue Links

• is related to: IGNITE-19914 .NET: Thin 3.0: Colocation column order is not preserved
• is related to: IGNITE-19935 Allow combining individual colocation hashes