eventual-consistency Questions
3
Solved
The whole reason why DynamoDB is fast and scalable is based on the fact that it is eventually consistent. But at the same time, it comes with this ConsistentRead option for operations like get, bat...
Kozlowski asked 14/11, 2019 at 18:37
8
Solved
I often hear about eventual consistency in different speeches about NoSQL, data grids etc.
It seems that definition of eventual consistency varies in many sources (and maybe even depends on a conc...
Oozy asked 9/4, 2012 at 19:21
2
I am interested in how others have handled a Read Side DB update failure in CQRS/Event Sourcing eventually consistent systems.
I have such a system that could append an event to my event store, an...
Knuckleduster asked 12/7, 2018 at 15:44
3
Elasticsearch doesn't have "read consistency" param (like Cassandra).
But it has "write consistency" and "read preference".
Documentation says the following about Write Consistency
Write Consis...
Lancelancelet asked 16/7, 2016 at 18:50
2
Solved
I am considering a noSQL solution for a current project, but I'm hesitant about the 'eventual consistency' clause in many of these databases. Is eventual consistency different than dealing with a m...
Butter asked 5/9, 2014 at 17:20
3
Solved
Amazon documentation (http://docs.aws.amazon.com/AmazonS3/latest/dev/Introduction.html#ConsistencyModel) states:
"Amazon S3 provides read-after-write consistency for PUTS of new objects in your S...
Heymann asked 22/3, 2017 at 16:29
2
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The AWS S3 docs state that:
Amazon S3 offers eventual consistency for overwrite PUTS and DELETES in all regions.
http://docs.aws.amazon.com/AmazonS3/latest/dev/Introduction.html#ConsistencyMo...
Moonseed asked 19/11, 2016 at 21:57
7
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When using distributed and scalable architecture, eventual consistency is often a requirement.
Graphically, how to deal with this eventual consistency?
Users are used to click save, and see the r...
Scharf asked 6/9, 2011 at 7:41
5
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I have an application where I need to store some data in a database (mysql for instance) and then publish some data in a message queue. My problem is: If the application crashes after the storage i...
Kakalina asked 5/2, 2017 at 15:4
1
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First of all let's say I have two separated aggregates Basket and Order in an e-commerece website.
Basket aggregate has two entities Basket(which is the aggregate root) and BaskItem defined as fol...
Rattish asked 5/9, 2018 at 11:53
1
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I understood that clickhouse is eventually consistent. So once an insert call returns, it doesn't mean that the data will appear in a select query.
does that apply to stand-alone clickhouse (no ...
Estienne asked 1/8, 2019 at 15:57
2
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In a microservice architecture, we usually have two ways for 2 microservices to communicate. Let’s say service A needs to get information from service B. The first option is a remote call, usually ...
Allx asked 12/3, 2019 at 1:56
5
Solved
Using CQRS and Event store the choreography between microservices delivers an Eventual consistency where in the changes in one microservice take a bit to propagate to the other downstream systems(e...
Laceylach asked 17/1, 2018 at 5:57
2
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I'm having an issue with (re)applying events from multiple topics in the correct order on the read / query side.
Example:
On the write / command side, we have 2 Aggregates with an n:m relationshi...
Wayfarer asked 25/11, 2017 at 5:28
1
There are two definitions I found on the Internet:
Sequential consistency -- the result of any execution is the same as if the operations of all the processors were executed in some sequential ord...
Pectoralis asked 25/9, 2017 at 7:9
3
Solved
Is that correct that ZooKeeper is always CP (in terms of CAP theorem)?
Or is there anyway to use it as AP for service discovery needs?
Slumgullion asked 14/2, 2016 at 2:40
2
Solved
Please, imagine you have a method like the following:
public void PlaceOrder(Order order)
{
this.SaveOrderToDataBase(order);
this.bus.Publish(new OrderPlaced(Order));
}
After the order is sav...
Aldon asked 11/6, 2015 at 12:36
3
Solved
I'm digging into CQRS and I am looking for articles on how to solve client reads in an eventual consistent system. Consider for example a web shop where users can add items to their cart. How can y...
Antineutrino asked 30/4, 2012 at 7:8
5
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What is the meaning of eventual consistency in Cassandra when nodes in a single cluster do not contain the copies of same data but data is distributed among nodes. Now since a single peice of data ...
Introspection asked 3/1, 2011 at 12:18
1
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I am trying to structure an application using DDD and onion/hexagonal/clean architecture (using Java and Spring). I find it easier to find guidance on the concepts themselves than actually how to i...
Toughminded asked 24/1, 2017 at 9:33
4
Solved
I have a fairly simple domain model involving a list of Facility aggregate roots. Given that I'm using CQRS and an event-bus to handle events raised from the domain, how could you handle validation...
Quadrangular asked 26/5, 2010 at 21:18
1
Say I have two collections, each with value independent of each other, but each related to one another. They are photos and users. There is a one-to-many relationship between users and photos.
An ...
Cadelle asked 28/1, 2016 at 0:40
1
When running a web application in a farm that uses a distributed datastore that's eventually consistent (CouchDB in my case), should I be ensuring that a given user is always directed to same the d...
Darill asked 10/4, 2015 at 13:56
1
Solved
(I could not find a good source explaining this, so if it is available elsewhere, you could just point me to it)
Hazelcast replicates data across all nodes in clusters. So, if data is changed in ...
Kierakieran asked 3/6, 2015 at 14:55
2
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The ThoughtWorks Technology Radar July 2014 mentions under Techniques / Trial a new trend called REST without PUT. They explain it as:
In the last radar we talked about Capturing Explicit ...
Philips asked 29/10, 2014 at 8:25
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