MongoD...Concern(3pm)

💖 MongoDB::WriteConcern — the manual, but make it cute

okay so first things first, bestie: this is MongoDB::WriteConcern(3pm), from the User Contributed Perl Documentation collection. She's a Perl module and she's here to encapsulate and validate a write concern 🌸. That's the whole vibe. Let's get into it.

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✨ VERSION ✨

version v2.2.2 — yeah she's on v2.2.2, we stan a specific version number 💅

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🦋 SYNOPSIS 🦋

here's how you actually use her, no cap:

$rp = MongoDB::WriteConcern->new(); # w:1, wtimeout: 1000

$rp = MongoDB::WriteConcern->new(
    w        => 'majority',
    wtimeout => 10000, # milliseconds
);

see how easy that is?? first one is just the default situation (w:1, wtimeout: 1000), second one is you being ✨specific✨ about wanting 'majority' and a 10000 millisecond timeout. note that the timeout is in milliseconds, don't come at me later saying you thought it was seconds 😭

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🌈 DESCRIPTION 🌈

so what even is a write concern?? it describes the guarantee that MongoDB provides when reporting on the success of a write operation. that's it, that's the tea ☕. it's MongoDB telling you "yeah girl, that write went through" and how confident that statement is.

for the core documentation on read preference (yes, read preference, not write, that's just where the docs send you), go look at:

http://docs.mongodb.org/manual/core/read-preference/

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🎀 ATTRIBUTES 🎀

🌟 w

Specifies the desired acknowledgement level. if you don't set it, the server default gets used, which is usually "1". lowkey just leaves it up to the server, which is a choice 💜

⏰ wtimeout

How long to wait for the write concern to be satisfied — in milliseconds. defaults to 1000. and listen: if you set this to undef, it could block indefinitely (or at least until the socket timeout is reached). so like... be aware of that, bestie 👀

📓 j

The j option confirms that the mongod instance has written the data to the on-disk journal. defaults to false.

⚠️ note bestie: specifying a write concern that sets j to a true value may result in an error with a mongod or mongos running with the --nojournal option now errors. yeah. it's giving consequences. be careful 🙈

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👑 AUTHORS 👑

the icons who made this happen, in order:

• David Golden <david@mongodb.com>
• Rassi <rassi@mongodb.com>
• Mike Friedman <friedo@friedo.com>
• Kristina Chodorow <k.chodorow@gmail.com>
• Florian Ragwitz <rafl@debian.org>

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📜 COPYRIGHT AND LICENSE 📜

This software is Copyright (c) 2020 by MongoDB, Inc.

This is free software, licensed under:

The Apache License, Version 2.0, January 2004

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so that's the whole page, periodt 💖 she's perl v5.40.1, dated 2025-04-03, and yeah — this was MongoDB::WriteConcern(3pm), no cap. go w => 'majority' responsibly, bestie 🫶✨