The tag has no wiki summary.

learn more… | top users | synonyms

1
vote
0answers
34 views

How to aggregating data with Cassandra and Apache Spark using counters?

I using Spark Streaming to roll up the analytic events and push to Cassandra 2.1+ database where data model resembles: CREATE TABLE rollup ( metric_1 text, metric_1_value counter ); The ...
1
vote
0answers
43 views

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 ...
2
votes
4answers
328 views

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 ...
2
votes
0answers
54 views

Economics of scaling, denormalizing NoSQL for personalized content

I am using Cassandra for a data intensive app. With relatively little operations and deployment experience, the expertise I am looking for is someone that can read the example below and decide whether ...
4
votes
2answers
2k views

Document-oriented vs Column-oriented database fit

I have a data-intensive application that desperately needs a database make-over. The general data model: There are records with RIDs, grouped together by group IDs (GID). The records have arbitrary ...
2
votes
1answer
219 views

Scuttlebutt Reconciliation in the paper “Efficient Reconciliation and Flow Control for Anti-Entropy Protocols”

I am reading the paper "Efficient Reconciliation and Flow Control for Anti-Entropy Protocols"! , I couldn't clearly understand Section 3.2 "Scuttlebutt Reconciliation". Here I extract out some ...
6
votes
3answers
555 views

My Cassandra consultant left me and now I'm thinking about reverting to mysql [closed]

I run a middle size community and some time ago I started to develop social capabilities such as follow, status update, wall etc. For some reason i thought that Cassandra was the right tool for the ...
5
votes
5answers
603 views

Should I use a relational datamodel or Cassandra with ColumnFamily based indexes?

Currently we are working on some storage problems for log data from various servers and communication message logs (HTTP(S), XMPP). There will be many write operations and for read operations we will ...
2
votes
3answers
872 views

Scalable distributed file system for blobs like images and other documents [closed]

Cassandra & HBase both do not efficiently support storage of blobs like images. Storing directly on HDFS stresses the Namenode because of huge number of files. Facebook uses Haystack for images ...
4
votes
2answers
370 views

Using HBase or Cassandra for a token server

I've been trying to figure out how to use HBase/Cassandra for a token system we're re-implementing. I can probably squeeze quite a lot more from MySQL, but it just seems it has come to clinging on to ...
1
vote
2answers
563 views

what is storing data in constant space?

"bloom filter allows us to store data in constant space" Can someone explain what exactly does that sentence means?
2
votes
3answers
356 views

Where should I include comments in my “self-documenting code”?

I'm currently developing a web-app by myself and have made it a point to use descriptive variable and method names (sometimes at the expense of brevity) in order to minimize commenting. The plan was ...