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Michael Cahill Talks about the Wired Tiger Storage Engine

podcasts.mongodb.com
2 points·by jd_mongodb·4 tahun yang lalu·1 comments

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jd_mongodb
·3 tahun yang lalu·discuss
You knowledge of MongoDB is a little out of date.

MongoDB supports SQL queries. Tableau has an MongoDB connector. You can connect MongoDB to Excel via our DataAPI and of course our Cloud platform provides embeddable charts.

Only the DataAPI is a relatively recent addition. The rest are very mature features.
jd_mongodb
·3 tahun yang lalu·discuss
Comparing any modern database (i.e. developed after 1980) with IMS is like comparing a flint knife with a Barrett .50 calibre.
jd_mongodb
·3 tahun yang lalu·discuss
We would love to help promote this? Ping me Joe dot Drumgoole at mongodb.com as we can get you some time on our podcast.
jd_mongodb
·3 tahun yang lalu·discuss
See also https://www.mongodb.com/developer/products/atlas/atlas-data-...
jd_mongodb
·4 tahun yang lalu·discuss
See also https://www.youtube.com/watch?v=9MFv8J7Smws
jd_mongodb
·4 tahun yang lalu·discuss
See https://cloud.google.com/blog/products/data-analytics/mongod...
jd_mongodb
·4 tahun yang lalu·discuss
MongoDB provides MongoDB Atlas, our own managed service. which is supported on every cloud (AWS, Azure, GCP).
jd_mongodb
·4 tahun yang lalu·discuss
We have recognised this problem and to that end we have produced a Stable API standard https://www.mongodb.com/docs/manual/reference/stable-api/

I realise this doesn't help you with historical API changes.

If you look for help in the MongoDB community and tag me ([email protected]) I will make sure you get help migrating your app.

https://www.mongodb.com/community/forums/
jd_mongodb
·4 tahun yang lalu·discuss
MongoDB has an SQL interface these days if you need it

https://www.mongodb.com/atlas/sql
jd_mongodb
·4 tahun yang lalu·discuss
I am not disputing the bill, just curious how he got there. He doesn't say in his post.
jd_mongodb
·4 tahun yang lalu·discuss
I did manage to approach his costs by running a sharded cluster with our largest configuration (M600 nodes with 640GB RAM. 4TB storage and 3.8m IOPS).

That is priced quite clearly on the bottom page at 102.49 USD an hour.
jd_mongodb
·4 tahun yang lalu·discuss
MongoDB actually doesn't store JSON. It stores a binary encoding of JSON called BSON (Binary JSON) which encodes type and size information.

This means we can encode objects in your program directly into objects in the database. It also means we can natively encode documents, sub-documents, arrays, geo-spatial coordinates, floats, ints and decimals. This is a primary function of the driver.

This also allows us to efficiently index these fields, even sub-documents and arrays.

All MongoDB collections are compressed on disk by default.

(I work for MongoDB)
jd_mongodb
·4 tahun yang lalu·discuss
Every field in a MongoDB document (we encoded documents in BSON at the driver level) is typed and you can apply a schema to any collection if you choose to do so.
jd_mongodb
·4 tahun yang lalu·discuss
It's almost as if MongoDB didn't create the JSON API that practically everyone has adopted.
jd_mongodb
·4 tahun yang lalu·discuss
Do you have a reference to that article?
jd_mongodb
·4 tahun yang lalu·discuss
Can share some more details? Site looks fine now. A screen shot perhaps. You can always ping the @mongodb twitter when you see issues like this.
jd_mongodb
·4 tahun yang lalu·discuss
I can see the source of confusion. Apologies. I mentioned ACID transactions were released in 4.0 but did not explicitly mention when the problems arose which of course was in 4.2 which was actually released a year later. The version numbers are clearly referenced in the Jepsen article.
jd_mongodb
·4 tahun yang lalu·discuss
Also read the addendum from the same report:

1 Updates 2020-05-26: MongoDB identified a bug in the transaction retry mechanism which they believe was responsible for the anomalies observed in this report; a patch is scheduled for 4.2.8.
jd_mongodb
·4 tahun yang lalu·discuss
You must not have looked at MongoDB. We have been delivering fully consistent ACID transactions since 4.0 which shipped several years. Yes, Jepsen did find some issues with the initial release of ACID transactions and yes, we fixed those problems pretty rapidly.
jd_mongodb
·4 tahun yang lalu·discuss
I don't think I mentioned role model. We most definitely don't model ourselves on IBM. I was just pointing out their longevity which is impressive to me.