kandi X-RAY | orleans Summary
kandi X-RAY | orleans Summary
Orleans builds on the developer productivity of .NET and brings it to the world of distributed applications, such as cloud services. Orleans scales from a single on-premises server to globally distributed, highly-available applications in the cloud. Orleans takes familiar concepts like objects, interfaces, async/await, and try/catch and extends them to multi-server environments. As such, it helps developers experienced with single-server applications transition to building resilient, scalable cloud services and other distributed applications. For this reason, Orleans has often been referred to as "Distributed .NET". It was created by Microsoft Research and introduced the Virtual Actor Model as a novel approach to building a new generation of distributed systems for the Cloud era. The core contribution of Orleans is its programming model which tames the complexity inherent to highly-parallel distributed systems without restricting capabilities or imposing onerous constraints on the developer.
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orleans Key Features
orleans Examples and Code Snippets
Trending Discussions on orleans
I have two large-ish data frames I am trying to append...
In df1, I have state codes, county codes, state names (Alabama, Alaska, etc.), county names, and years from 2010:2020.
In df2, I have county names, state abbreviations (AL, AK), and data for the year 2010 (which I am trying to merge into df1. The issue lies in that without specifying the state name and simply merging df1 and df2, some of the data which I am trying to get into df1 is duplicated due to there being some counties with the same name...hence, I am trying to also join by state to prevent this, but I have state abbreviations, and state names.
Is there any way in which I can make either the state names in df1 abbreviations, or the state names in df2 full names? Please let me know! Thank you for the help.
ANSWERAnswered 2022-Apr-18 at 03:52
Here's one way you could turn state abbreviations into state names using R's built in state vectors:
The error is occurring when I try to sort this data list:...
ANSWERAnswered 2022-Apr-01 at 04:28
In base Python, we can try sorting using a lambda expression:
I'm trying to get Prometheus functioning with my Orleans silos...
I use this consumer to expose Orleans metrics for Prometheus on port 8082. With a local Prometheus instance and using the grafana.json from the same repository I see that it works....
ANSWERAnswered 2022-Mar-21 at 10:36
Thanks to @BozoJoe's comment I could debug this.
The problem was that it was trying to scrape ports 30000 and 1111 instead of 8082 like I said before. I could see this thanks to the Prometheus dashboard at localhost:9090/targets
So I went to prometheus config file and make sure to start scrapping the correct port (also I added some restrictions to the search for name):
I have a grain in Orleans for the players of a game. A player has several properties that I want to access directly in the client. Is it possible, is it efficient and does it make sense to have these as public properties on the grain? Or, should I have a GetAllState method that returns a DTO with the current value of these properties in the grain?...
ANSWERAnswered 2021-Nov-19 at 14:00
Introduction of a complex return type to minimize roundtrips is a valid solution.
However, I wouldn't return the whole internal state, as I assume that not all the clients need all the data all the time. It may also be a sign that you have a business logic implemented outside of the grains and you should move it into the grain.
I need to create a very basic map of disease rates in Louisiana.
I have one dataset with rate and parish information. Here is the dput info:...
ANSWERAnswered 2022-Mar-05 at 20:18
map_data, you need to use
county rather than
state to get the correct subregions. Then, we can use
left_join to merge them together by county (i.e.,
Jurisdiction). There is a letter case difference, so I first converted Jurisdiction to lowercase to match the data from
df is the OP data from
The code below creates
Perl/Tk buttons filled with each event's details from the hash
%events. Is there a way to format the text inside the buttons so that it appears in aligned columns in the manner printf prints it out on line 16.
ANSWERAnswered 2022-Mar-05 at 20:16
To align the columns, set font of each button to "Courier" (or another monospaced font). There are at least two ways to do this:
- when creating the button
- assign the button to a variable and then call
I am trying to run a container image in GCP Cloud run.
Tech Stack: .NET 6, C#, Orleans.NET, ASP.NET
My code requires the podIP to work properly.
This programs works properly in a regular Kubernetes cluster, because I am able to set an environment variable with the assigned podIP with the following configuration in the "env" section of the deployment.yaml file:...
ANSWERAnswered 2022-Feb-08 at 12:04
Cloud Run is a serverless product. As serverless product, you don't manage the servers and the network. Therefore, asking for the podIP make no sense and has no value (at least, it will be a private IP in the Google Cloud serverless network).
So, the answer is "NO, you can't get the podIP".
But why do you need it? You can set a dummy value and see what happens we your container. Or to update your code to make optional that value.
The doc does not explain clearly. I suppose
PreferLocalPlacement works in this way:
When client(out of cluster) sends a request to a grain marked as
PreferLocalPlacement, it chooses a random silo server it knows, and sends the request there.
When the silo server receives the request, it determines if grain with the specified identity was already activated. If not, the grain is activated automatically in this silo.
Thus, each silo server can have max 1 activation of this grain type per an identity.
Do I get it right? Thanks in advance...
ANSWERAnswered 2022-Jan-25 at 17:48
Your understanding is close but missing a key aspect of how Orleans finds and places grain activations.
The key is that most placement providers in Orleans rely on a grain directory. That directory stores the current mapping of which grain is activated on which server. Like placement, the directory is configurable. It uses an in-cluster directory by default, where responsibility for storing the mapping is shared among the servers.
Orleans will check the directory first, to see if the grain is currently activated somewhere in the cluster and it will only run the logic in
PreferLocalPlacement when the grain does not currently have a valid entry in the directory.
Therefore, you will have one instance of your grain active in the cluster, not one instance per server. If there are no currently active instances of your grain then
PreferLocalPlacement will always pick the current, local server (or the server which the request first lands on) as long as it is compatible.
Clusters can have a mix of servers each having a different set of grain assemblies loaded. Therefore, placement providers need to take into account whether a given server is compatible with the requested grain type and if it has a compatible version of the interface which is being requested. If it does not support that grain, then a random compatible server will be chosen instead. For more information, see the documentation on Heterogeneous Clusters."Most placement providers rely on a grain directory"
You might ask which placement providers do not rely on a grain directory. The only answer today is
[StatelessWorker] placement, since
[StatelessWorker] grains can have multiple instances, i.e, each server can have a configurable number of local instances of any given
I am trying to follow their tutorial for tests: Link to Orleans test docs
But the configuration shown is pretty simplistic:...
ANSWERAnswered 2022-Jan-14 at 21:34
The setup needs to be improved. You can check this sample from the official Orleans GitHub page: https://github.com/dotnet/orleans/blob/main/test/TesterInternal/StreamingTests/SMSStreamingTests.cs
So, in your
ClusterFixture class you should add the
I'm trying to run Orleans silo(s) in Azure function app isolated process. First time it seems running fine, but a couple hours later the function fails with connection errors Error logs
I found in OrleansMembershipTable that many Silos are registered there with private IP address (192.168.7.32, 192.168.4.108, 192.168.7.254...) Apparently the function app is constantly instantiated and disposed OrleansMembershipTable
Okay it can happen but my question is, shouldn't it be handled automatically by Orleans, if a silo is already dead, instead of failing request by connection error to the dead silo?
Or is it not possible to run Silos in isolated function app? I could find some example using separated Azure web job (silo) + Function app (Orleans client), which makes sense but I'd prefer having a single app, simpler architecture...
ANSWERAnswered 2022-Jan-13 at 12:12
It was a kind of user error : I was using the same deployment id for my local development and Azure deployment, and they each other could not confirm dead or alive, messing up the service.
I have separated the cluster id for my local development and Azure deployment, as in the screenshot :
Then everything works fine. Although still Azure function app restarts itself occasionally, they detect the dead silo immediately and clean up the states.
No vulnerabilities reported
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