[DRIVERS-815] Snapshot reads on Secondaries - MongoDB Jira

XML

Word

Printable

JSON

Details

Type: Epic
Status: Closed
Priority: Blocker - P1
Resolution: Done
Fix Version/s: None
Component/s: None
Labels:
- MDBL21

Driver Changes:
Needed
Server Compat:
- 4.9
Quarter:
- FY22Q2
Upstream Changes Summary:

Hide

Specific changes and impacts documented on the downstream Docs ticket

Show
Specific changes and impacts documented on the downstream Docs ticket
Downstream Changes Summary:

Hide

NA

Show
NA

Cost Threshold %:
100
Detailed Project Statuses:
Hide

Summary: Earlier this year the server added support for a readConcern level “snapshot” on read operations outside of multi-document transactions for both primaries and secondaries. This project covers any work that needs to be done across MongoDB drivers to ensure completeness of this feature for our users.

Author: Boris Dogadov

2021-08-25

C, .NET, Go, Java, Python, Node, Rust, PHP implementations are done

CXX, Ruby has prioritized this for Q3

2021-08-10

C, .NET, Go, Java, Python, Node, Rust implementations are done

PHP in progress

CXX has prioritized this for Q3

2021-07-27

C, .NET, Go, Java, Python, Node, Rust implementations are done

CXX and PHP have prioritized this for Q3

2021-07-12:

Java, Python implementations done

C, C# wrapping up (main implementation done)

Go, Rust in code review

Node in progress

2021-06-28:

Major spec changes in. Two more small spec change tickets were created last week and Shane will be working on them since Boris is OOO

C, C# implementation in review. Java, Python in progress. This is next up for Go

2021-06-15:

Re-implemented tests using the Sessions API proposal. Once that is complete will write up the specification itself. Expected to be in review in the next few days

Go and C implementations up next
Show
Summary: Earlier this year the server added support for a readConcern level “snapshot” on read operations outside of multi-document transactions for both primaries and secondaries. This project covers any work that needs to be done across MongoDB drivers to ensure completeness of this feature for our users. Author: Boris Dogadov 2021-08-25 C, .NET, Go, Java, Python, Node, Rust, PHP implementations are done CXX, Ruby has prioritized this for Q3 2021-08-10 C, .NET, Go, Java, Python, Node, Rust implementations are done PHP in progress CXX has prioritized this for Q3 2021-07-27 C, .NET, Go, Java, Python, Node, Rust implementations are done CXX and PHP have prioritized this for Q3 2021-07-12: Java, Python implementations done C, C# wrapping up (main implementation done) Go, Rust in code review Node in progress 2021-06-28: Major spec changes in. Two more small spec change tickets were created last week and Shane will be working on them since Boris is OOO C, C# implementation in review. Java, Python in progress. This is next up for Go 2021-06-15: Re-implemented tests using the Sessions API proposal. Once that is complete will write up the specification itself. Expected to be in review in the next few days Go and C implementations up next

Description

Downstream Change Summary

Scope Document

Implement Snapshot session spec
Implement Snapshot session tests . This ticket introduced unified tests for the sessions specification. Drivers should sync tests in sessions/tests/unified with mongodb/specifications@8ade331. Existing legacy tests were moved to sessions/tests/legacy but are otherwise unchanged.

Description of Linked Ticket

Epic Summary

Summary

Support readConcern level "snapshot" (non-speculative) for read commands outside of transactions, including on secondaries.

Motivation

Once durable history is implemented in WiredTiger, MongoDB will be able to support long-running snapshot reads. By supporting snapshot reads on secondaries, this feature can be used for analytics queries. It's important to use non-speculative behavior so that queries do not need to consume all results and wait for a transaction to commit in order to know that the data read was majority committed.

Documentation

Scope Document
Technical Design Document

SPEC Ticket Description

// This block of HTML and the script in it auto-populate the SPEC ticket description on page load. Script Target - If you can read this text, the script has failed

Attachments

Issue Links

is depended on by

SERVER-48460 Snapshot "distinct" support in the shell

Closed

split to

CDRIVER-3891 Snapshot reads on Secondaries

Closed

CSHARP-3395 Snapshot reads on Secondaries

Closed

CXX-2182 Snapshot reads on Secondaries

Closed

GODRIVER-1866 Snapshot reads on Secondaries

Closed

JAVA-3992 Snapshot reads on secondaries

Closed

MOTOR-664 Snapshot reads on Secondaries

Closed

NODE-3081 Snapshot reads on Secondaries

Closed

PHPC-1761 Snapshot Reads

Closed

PYTHON-2552 Snapshot reads on Secondaries

Closed

RUBY-2524 Snapshot reads

Closed

RUST-661 Snapshot reads on Secondaries

Closed

mentioned in: Page Loading...; Page Loading...

(7 split to, 2 mentioned in)

Activity

People

Assignee:: Unassigned

Reporter:: Backlog - Core Eng Program Management Team

Votes:: 1 Vote for this issue

Watchers:: 10 Start watching this issue

Dates

Created:: Jan 28 2020 06:19:09 PM UTC

Updated:: Feb 15 2023 11:11:15 PM UTC

Resolved:: Nov 15 2021 10:49:37 PM UTC