How is Cassandra as an alternative to MongoDB?
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Well, the warrior has lower upkeep costs. Keep that in mind.
Jepsen Disputes MongoDB's Data Consistency Claims
181–190 of 416 posts
Re: Jepsen Disputes MongoDB's Data Consistency Claims
#182In the circles I run in, MongoDB is regarded as a joke and the company behind it as basically duplicitous. For example, they still list Facebook as their first user of MongoDB on their website, for example, but there is no MongoDB use in Facebook hasn't been for years (it came in only via a startup acquisition). I had the misfortune to use MongoDB at a previous job. The replication protocol wasn't atomic. You would f…
Isn't it amazing MongoDB is a 12 billion dollar company? Someone is using it and actually paying for it, even though it's not any of the developers you or I know.
Re: Jepsen Disputes MongoDB's Data Consistency Claims
#183Earlier quoted context omitted.
SQLite has always intentionally failed to report this error: sqlite> create table foo (n int); sqlite> insert into foo (n) values ('dave'); sqlite> select count(*) from foo where n = 'dave'; 1
That is documented as a feature. https://www.sqlite.org/different.html under "Manifest typing". SQLite does not use column typing except in integer primary keys.
SQLite accepts a type constraint without enforcing it. That's a bug just like MySQL sometimes accepting a foreign key constraint without enforcing it.
Re: Jepsen Disputes MongoDB's Data Consistency Claims
#184In the circles I run in, MongoDB is regarded as a joke and the company behind it as basically duplicitous. For example, they still list Facebook as their first user of MongoDB on their website, for example, but there is no MongoDB use in Facebook hasn't been for years (it came in only via a startup acquisition). I had the misfortune to use MongoDB at a previous job. The replication protocol wasn't atomic. You would f…
Every single time I've had to work on top of a Mongo cluster, it has gone into "three stooges" mode, where each node insists that one of the others is master. I pretty much refuse to deploy a new instance of it now, I've been burned too often.
"I'm trying to sync, but nothing happens!"
Re: Jepsen Disputes MongoDB's Data Consistency Claims
#185Earlier quoted context omitted.
Ah I see, we are going with “well technically it stores something therefore it is database joke”. Now I’m fully onboard :) Back when I worked in LA my CTO used to joke that most places use Microsoft Outlook as a database and Excel as BI tool.
You laugh, but I bet Excel produces orders of magnitude more real "business intelligence" than all other "BI" tools combined.
Here is an anecdote.
I had to work on a tool that shows what's wrong with an assembly line: missing parts, delays, etc... So that management can take corrective action. Typical "BI" stuff but in a more industrial setting.
The company went all out on new technologies. Web front-end, responsive design, "big data", distributed computing, etc... My job was to use PySpark to extract indicators from a variety of data sources. Nothing complex, but the development environment was so terrible it turned the most simple task into a challenge.
One day, the project manager (sorry, "scrum master") came in, opened an excel sheet, imported the data sets, and in about 5 minutes, showed me what I had to do. It took me several days to implement...
So basically, my manager with Excel was hundreds of times more efficient than I was with all that shiny new technology.
That experience made me respect Excel and people who know how to use it a lot more, and modern stacks a lot less.
I am fully aware that Excel is not always the right tool for the job, and that modern stacks have a place. For example, Excel does not scale, but there are cases where you don't need scalability. An assembly line isn't going to start processing 100x more parts anytime soon, and one that does will be very different. There are physical limits.
Re: Jepsen Disputes MongoDB's Data Consistency Claims
#186I wonder if I'm the only sysadmin in the world who doesn't hate MongoDB. Yes, I wouldn't use it for new projects, and yes, I wish RethinkDB had taken its place, but it's not as horrible as people seem to think. Default configuration... If it weren't for RDS' doing PG-bouncer-style connection management, 95% of production postgres instances would probably fail. It innodb_buffer_pool_size wasn't set properly, plenty of data-centers would light on fire. If no one setup a firewall or AOF for redis, it's data-loss and data-exposure waiting to happen. If no one adds auth to an HTTP route, it's open to the world, etc etc etc. If tech-stacks were legos, software engineers would earn a heck of a lot less.
I absolutely agree it's been used by people who just don't want to write SQL queries, or being used as a text-search-engine in place of something like more appropriate like ElasticSearch, but to mock successful projects who were based on it seems silly. It reminds me of interviewing candidates at a startup who primarily used PHP/MySQL. Most of them openly laughed and called it all horrible. I voted "no" on them, and sometimes injected a somewhat toxic "ah, you're right - we should close up shop. Someone call Facebook - tell them their tech stack is horrible - shut it all down!".
You can learn a lot about a developer by asking "What do you think about Mongo, JavaScript, or PHP", and if their response isn't a shrug, they're probably more concerned with what editor is correct than if the product they're building is useful. It's an exceptional filter to reject zealots and find pragmatists.
All that said, MariaDB with MyRocks is _awesome_, but certainly not with the default settings :)
Re: Jepsen Disputes MongoDB's Data Consistency Claims
#187Earlier quoted context omitted.
That is documented as a feature. https://www.sqlite.org/different.html under "Manifest typing". SQLite does not use column typing except in integer primary keys.
SQLite accepts a type constraint without enforcing it. That's a bug just like MySQL sometimes accepting a foreign key constraint without enforcing it.
It's not a type constraint. It's a hint to SQLite to try and coerce values when it can. Here's what that link parent posted says:
> As far as we can tell, the SQL language specification allows the use of manifest typing. Nevertheless, most other SQL database engines are statically typed and so some people feel that the use of manifest typing is a bug in SQLite. But the authors of SQLite feel very strongly that this is a feature. The use of manifest typing in SQLite is a deliberate design decision which has proven in practice to make SQLite more reliable and easier to use, especially when used in combination with dynamically typed programming languages such as Tcl and Python.
It's intended behavior that's compatible with the SQL spec.
Re: Jepsen Disputes MongoDB's Data Consistency Claims
#188Re: Jepsen Disputes MongoDB's Data Consistency Claims
#189In the circles I run in, MongoDB is regarded as a joke and the company behind it as basically duplicitous. For example, they still list Facebook as their first user of MongoDB on their website, for example, but there is no MongoDB use in Facebook hasn't been for years (it came in only via a startup acquisition). I had the misfortune to use MongoDB at a previous job. The replication protocol wasn't atomic. You would f…
Tangentially related their sales strategy is questionable.
As an intern at Shopify, I got an email from MongoDB asking us to switch. Shopify was 10 years old the time. Plus several coworkers would also receive similar emails two years later (and some in between of course).
I have a shirt from MemSQL that says "Friends don't let friends NoSQL" and I wear it proudly.
Re: Jepsen Disputes MongoDB's Data Consistency Claims
#190In the circles I run in, MongoDB is regarded as a joke and the company behind it as basically duplicitous. For example, they still list Facebook as their first user of MongoDB on their website, for example, but there is no MongoDB use in Facebook hasn't been for years (it came in only via a startup acquisition). I had the misfortune to use MongoDB at a previous job. The replication protocol wasn't atomic. You would f…
Nobody seems to like it. Someone has any idea on why the company still has their revenue increasing ?
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