![#MongoDB
Extend: $lookup
}
.
.
.
,
“product_details” : [{
“_id” : 7,
“title” : “My Memoir”
}]
}
{
“_id” : 2,
“product_id” : 7
,
“product_details” : [{
“_id” : 5,
“title” : “A great book”
}]
.
.
.
{
“_id” : 1,
“product_id” : 5](https://image.slidesharecdn.com/asya-760bc15a-fc9e-40f5-bfdc-093c6387da3e-142546978-161103030002/75/MongoDB-Launchpad-2016-What-s-New-in-the-3-4-Server-7-2048.jpg)
![#MongoDB
Extend: Read-Only Views
> db.rides.findOne()
{ "_id" : ObjectId("572bb8572b288919b6a47779"), "startStation" : 498,
"endStation" : 253, "bike" : 23691 }
> db.createView( "rides_safe", "rides", [{$project: {'user_ssn': 0}}] );
> db.rides_safe.findOne()
{ "_id" :ObjectId("572bb8572b288919b6a47779"), "startStation" : 498,
"endStation" : 253, "bike" : 23691, "user_ssn" : "123-45-6789" }](https://image.slidesharecdn.com/asya-760bc15a-fc9e-40f5-bfdc-093c6387da3e-142546978-161103030002/75/MongoDB-Launchpad-2016-What-s-New-in-the-3-4-Server-16-2048.jpg)
Uploaded byMongoDB
MongoDB Launchpad 2016: What’s New in the 3.4 Server
Asya Kamsky, a lead product manager at MongoDB, discussed improvements, extensions, and innovations in MongoDB. These included improvements to the Wired Tiger storage engine, replica set election process, and initial sync process. MongoDB was also extended with features like document validation, partial indexes, $lookup, read-only views, and faceted search. Innovations involved improvements to the aggregation pipeline, mixed storage engine sets, zones, and BI connectors.
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MongoDB Launchpad 2016: What’s New in the 3.4 Server
- 1. A MongoDB event #MongoDB LeadProduct Manager MongoDB @asya999 Asya Kamsky
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- 4. #MongoDB Improve: Replica SetElection 1 2 3
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- 7. #MongoDB Extend: $lookup } . . . , “product_details” :[{ “_id” : 7, “title” : “My Memoir” }] } { “_id” : 2, “product_id” : 7 , “product_details” : [{ “_id” : 5, “title” : “A great book” }] . . . { “_id” : 1, “product_id” : 5
- 8. #MongoDB Innovate: Aggregation PipelineImprovements $match $sum6 6 3 3 6 4 13
- 9. #MongoDB Innovate: Mixed StorageEngine Sets
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- 14. #MongoDB …… Improve: Collation PerOperation d,D c,C b,Ba,A d c b a
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- 16. #MongoDB Extend: Read-Only Views >db.rides.findOne() { "_id" : ObjectId("572bb8572b288919b6a47779"), "startStation" : 498, "endStation" : 253, "bike" : 23691 } > db.createView( "rides_safe", "rides", [{$project: {'user_ssn': 0}}] ); > db.rides_safe.findOne() { "_id" :ObjectId("572bb8572b288919b6a47779"), "startStation" : 498, "endStation" : 253, "bike" : 23691, "user_ssn" : "123-45-6789" }
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- 19. #MongoDB Extend: More Agg! $addFields$bucket6 1-5 5-9 9-max
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- 27. Server Features Decimal Faster Balancing ConfigurableConsistency New Platforms Compression mongoreplay
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