It seems a same thing from users aspect.

I wanted to know if there was a good practice for list of values management. For example I have a database table logs as following : --------------- | logs | |-------------| | id | | idLogType | ...

As suggested in comments from Key: value store in Python for possibly 100 GB of data, without client/server and in other questions, SQLite could totally be used as a persistent key:value store. Ho...

In badgerDB, we have billions of keys of type string and values of type HashValueList. In our use case length of HashValueList might be in millions. We have to encode key and value in []byte before...

In CAP theorem, Redis is specified as a database which lacks availability (which has partition tolerance and consistency). But there are many places where Redis is considered as a high availability...

There are many solutions to serialize a small dictionary: json.loads/json.dumps, pickle, shelve, ujson, or even by using sqlite. But when dealing with possibly 100 GB of data, it's not possi...

I will describe the data and case. record { customerId: "id", <---- indexed binaryData: "data" <---- not indexed } Expectations: customerId is random 10 digit number A...

What is the difference between iCloud's "Key-value storage" and CloudKit? An example scenario would be: if one were to sync a sizable array containing dictionaries, arrays, and other objects. Woul...

I am new to key-value stores. My objective is to use an embedded key-value store to keep the persistent data model. The data model comprises of few related tables if designed with conventional RDBM...

We have a system that stores (single-digit) millions of images, varying in size from 8KB to 500KB, median around 15KB, average 30KB. The total data set is currently around 100GB. We want to access ...

I am interested to know the performance impacts of using MySQL as a key-value database vs. say Redis/MongoDB/CouchDB. I have used both Redis and CouchDB in the past so I'm very familiar with their ...

var veg = {"mushroom": 30, "pepper": 60, "corn": 1, "carrot": 2, "pumpkin": 4} If the object value is greater than 5, then print all the keys from veg. I can't seem to figure out how to put the ...

I am trying to build a 6-tuple store on top of wiredtiger. The tuples can be described as follow: (graph, subject, predicate, object, alive, transaction) Every tuple stored in the database is un...

I am new to zookeeper and distributed systems, and am learning it myself. From what I understand for now, it seems that ZooKeeper is simply a key-value store whose keys are paths and values are s...

I have a simple question about using Cassandra as a key-value data store. I am stil new to Casandra concepts and I have searched for an answer for this question in several places but, I could not f...

I'd like a unique dict (key/value) database to be accessible from multiple Python scripts running at the same time. If script1.py updates d[2839], then script2.py should see the modified value whe...

I am working on a cloud application that requires low latency and very high read/writes per second. I will only have around 1 million records stored persistently but this may fluctuate largely as t...

I frequently write lists of things and perform enumeration against them to perform some get/set. I hate enumerating hashtables, since whenever I have to do it, I have to bend my mind backwards to ...

I'm trying to create a really simple IndexedDB with some JavaScript, but it fails in the on handler already. Apparently the browser (Chrome 57) is not able to parse the keyPath (in Basic Concepts) ...

I am new to Cassandra. As I understand the maximum number of tables that can be stored per keyspace is Integer.Max_Value. However, what are the implications from the performance perspective (speed,...

Berkeley DB (JE) licensing may be a deal killer. I have a Java application going to a small set of customers but as it is a desktop application, my price cannot support individual instance li...

Redis is single threaded yet it is fast. Can we use Redis database for API calls as APIs call is concurrent in nature? Is Redis capable of handling multiple API call requests?

During investigation within new features in Apache Kafka 0.9 and 0.10, we had used KStreams and KTables. There is an interesting fact that Kafka uses RocksDB internally. See Introducing Kafka Stre...

I am using GraphQL in my Node.js application. And I want to store an object that uses keys as a locale short code and values for the string in the corresponding language. (like { en: "Hello", ru: "...

I am looking to write a Key/value store (probably in python) mostly just for experience, and because it's something I think that is a very useful product. I have a couple of questions. How, in gene...