HN user

jd_mongodb

52 karma

Expired account

Posts5
Comments115
View on HN

You knowledge of MongoDB is a little out of date.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.

Comparing any modern database (i.e. developed after 1980) with IMS is like comparing a flint knife with a Barrett .50 calibre.

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.

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)

Use one big server 4 years ago

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.

Use one big server 4 years ago

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.

Use one big server 4 years ago

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.

MongoDB 6 Released 4 years ago

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.

MongoDB 6 Released 4 years ago

Oracle's doom is a tricky one to predict, they have been around for a long time. Can they survive Larry Ellison's retirement? Who can tell?

But IBM? You are having a laugh. IBM was there at the start of the computer industry and they have survived every single generation of change since, getting stronger each time.

Saying IBM has faded in relevance is absolutely farcical.

MongoDB 6 Released 4 years ago

If you want to ping me an email at Joe.Drumgoole@mongodb.com I can get that fixed pretty quickly.

MongoDB 6 Released 4 years ago

Try typing "mongodb customers" into Google.

Here is a few I know are public references:

MetLife, Epic Games, Bosch, Inland Revenue (UK), Department of Work and pensions (UK) Barclays, HSBC, Boots, Forbes, Toyota, Sanoma, Intuit, Verizon.

The DynamoDB Paper 4 years ago

You seem to think MongoDB is eventually consistent. MongoDB is designed as strongly consistent database. You can choose to query a secondary and that will be eventually consistent but that is not the default behaviour.

Of course if you don't like the id's that MongoDB generates by default you can always the supply your own. The only constraint on the _id field is that it be unique as we automatically apply a unique index. Effectively if you have a unique key for your data you should use _id for it as it saves you an index. (We always index _id).

(I work for MongoDB).