Questions tagged [cassandra]
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22 questions
2
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Initializing Cassandra schema
Recently I have started working on a project in which we are using Cassandra. It's a quite a new project, so we haven't decided how to initialize the schema.
We are using Docker and Kubernetes. I've ...
- 129
1
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2
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966
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What's the use of a wide-column NoSQL db such as Cassandra over a K-V store or a document based db?
Say we're making a simple photo app. This link says that we can store the image in S3 and now have a URL. Great. Next, we need a mapping of a UserID to the many images they've created. For this, it ...
- 47
5
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1
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370
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Achieving scalability and ACID with a RDBMS to NoSQL streaming solution
My understanding is that the main feature Cassandra has to offer is linear performance at any scale; meaning that if I know 1 C* node can handle 500 queries or commands per second from my app, then I ...
-2
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1
answer
377
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How to implement a scalable exists in large set query
I need to design a system where I need to check if a key exists or not.
Currently I am already using aerospike for the cause but my use case is slightly different.
I will have a key like this ( A ...
- 123
2
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1
answer
370
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Exploiting Apache Spark Data
and sorry if the question seems a bit naive.
I'm currently reading tutorials about Kafka & Spark and there's something I can't figure out : how to exploit / expose the data Spark received.
Here'...
- 123
5
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1
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1k
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Using key-value NoSQL DBs relationally
I am new to NoSQL and have always heard of "key-value" DBs like Cassandra or Riak and expected their tables to literally have two columns: a key-col and a value-col. I just started working at a new ...
- 4,970
1
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1
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960
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Is this Big Data architecture good enough to handle many requests per second?
I want to ask for a review of my big data app plan. I haven’t much experience in that field, so every single piece of advice would be appreciated.
Here is a link to a diagram of the architecture: My ...
- 137
2
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1
answer
777
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Near real-time analytics from Cassandra with frequent updates
We have an activity metrics page where users can select a date period and see other user's aggregated activity (by action) and optionally filter everything by 4 or 5 fields. Actions happen ...
- 129
4
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0
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586
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Expiring counters in Cassandra
So I know that TTL is not available for counters because of design reasons and I've read https://issues.apache.org/jira/browse/CASSANDRA-2103 as well as some other SO questions regarding this but ...
- 141
3
votes
3
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917
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When dealing with tens of billions of rows in a web app table, would a NoSQL database be noticeably faster than a relational one? [closed]
I'm currently designing a conceptual web app, where users can submit posts, comments, and "like"/"dislike" both of those. However, I am not sure of how to store the (dis)likes, because of how many ...
- 39
3
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57
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Realtime layered time data storage and calculations
I am having a hard time trying to figure out the best way to report on and calculate layered time data.
The problem:
A person can sign in multiple times, during this sign in there are multiple ...
- 163
4
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1
answer
1k
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How should I store usernames and passwords for user login using php/cassandra?
I am new to NOSQL and Cassandra. I am not sure if I should store usernames and password in Cassandra. If I should, what is the best way to do that? I am getting lots of conflicting ideas from research....
- 49
2
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1
answer
1k
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How to architect frequent updates in No-sql db (Cassandra) - architecture
I'm storing some data in Cassandra, then after analyzing it puts in several table, I have its aggregation as daily, weekly, monthly, yearly basis. But after some time if some user reads the content I'...
- 121
2
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1
answer
889
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Handling thousands of cassandra insert/updates
I have mobile app with backend server running in nodejs with cassandra as database. The app is like social network where you can share pictures and follow other people. Some operation like updating ...
- 207
3
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4
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2k
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Are NoSQL databases the best choice for more efficiently querying large amounts of data?
We are planning to build a travel website in which we will be integrating multiple APIs (eg. DOTW, GTA, Expedia) for Hotels. I have initially tried to use MySQL but since there are huge amounts of ...
- 139