distributed | A distributed task scheduler for Dask | Machine Learning library
kandi X-RAY | distributed Summary
kandi X-RAY | distributed Summary
A distributed task scheduler for Dask
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Top functions reviewed by kandi - BETA
- Return a dict of the command class to use
- Construct a ConfigParser from a root
- Get the project root directory
- Get the version information from the VCS
- Establish SSH connection
- Print the given arguments
- Get the Worker instance
- Update the renderers
- Compute the time series for the given time series
- Read data from the device
- Write the given arguments to the client
- Create the versioneer config file
- Append worker_port and nanny_workers
- Connect to given address
- Gather data from a worker
- Runs a function in parallel
- Get data from the broker
- Start the daemon
- Collect metrics
- Generate a status doc
- A background thread
- Collect the metrics for the scheduler
- Collect metrics from the server
- Start the worker
- Run the worker
- Execute a task
distributed Key Features
distributed Examples and Code Snippets
{!../../../docs_src/nosql_databases/tutorial001.py!}
{!../../../docs_src/nosql_databases/tutorial001.py!}
{!../../../docs_src/nosql_databases/tutorial001.py!}
def run_distribute_coordinator(worker_fn,
strategy,
eval_fn=None,
eval_strategy=None,
mode=CoordinatorMode.STANDALONE_CLIENT,
def __init__(self,
input_workers,
strategy,
dataset=None,
num_replicas_in_sync=None,
input_context=None,
components=None,
element_spec=None,
def validate_distributed_dataset_inputs(distribution_strategy, x, y,
sample_weights=None):
"""Validate all the components of a DistributedValue Dataset input.
Args:
distribution_strategy: The current D
import sys
for path in sys.argv[1:]:
with open(path, 'rb') as file:
while data := file.read(4096):
sys.stdout.buffer.write(data)
from random import sample
def allocate(n,k):
dividers = sample(range(1, n+k), k-1)
dividers = sorted(dividers)
dividers.insert(0, 0)
dividers.append(n+k)
return [dividers[i+1]-dividers[i]-1 for i in range(k)]
prin
def allocate(n, k):
return np.random.default_rng().multinomial(n, [1 / k] * k)
def allocate(n, k):
result = np.zeros(k)
sum_so_far = 0
for ind in range(k-1):
draw = np.random.randint(n - sum_so_far + 1)
sum_so_far += draw
result[ind] = draw
result[k-1] = n - sum_so_far
ret
Community Discussions
Trending Discussions on distributed
QUESTION
I am pretty new to Android. I am trying to create buttons dynamically in android.
But all the buttons are coming vertically listed column wise.I would want 25 buttons to be distributed in 5 rows and 5 columns.
...ANSWER
Answered 2021-Jun-15 at 13:00You can use FlowLayout to do what you want with your buttons. Just replace your LinearLayout with FlowLayout.
QUESTION
I have a following class that reads csv data into Spark's Dataset
. Everything works fine if I just simply read and return the data
.
However, if I apply a MapFunction
to the data
before returning from function, I get
Exception in thread "main" org.apache.spark.SparkException: Task not serializable
Caused by: java.io.NotSerializableException: com.Workflow
.
I know Spark's working and its need to serialize objects for distributed processing, however, I'm NOT using any reference to Workflow
class in my mapping logic. I'm not calling any Workflow
class function in my mapping logic. So why is Spark trying to serialize Workflow
class? Any help will be appreciated.
ANSWER
Answered 2021-Feb-17 at 08:21you could make Workflow implement Serializeble and SparkSession as @transient
QUESTION
I'm trying to sort my rows according to the Status (B), according to a custom order. I used to have Status in A, and the code worked fine, but then wanted to add an additional column before it and everything's been scuppered. Now getting a 1004 error.
My table spans A:L. Here's the code:
...ANSWER
Answered 2021-Jun-11 at 21:02The error implies that it can't find a range to work with.
As we are working with a table, the .Columns(2)
wont work.
This part hints that you have a table that your are trying to sort.
There's two approaches that I can think of now, to solve this:
1. Sort a regular range by custom list
We can remove the table by:
- Click on the table
- Go to design tab
- Convert to Range
Then your originally code will work (Changed Key1:=.Columns(2)
):
QUESTION
Further to: API Permission Issue while Azure App Registration
and Why is "Application permissions" disabled in Azure AD's "Request API permissions"?
I cannot activate the Application Permissions button in the API permissions when I am trying to register an application in Active Directory. I have created the roles (several times) and ensured all of the properties are correct as described in both posts and in https://docs.microsoft.com/en-us/azure/active-directory/develop/scenario-protected-web-api-app-registration - including that it the role is set for application, . I am using the default directory of my Azure account. I am the only member in my directory and am a member of global administrators.
Is there something else I am missing?
My end goal is simply to use the .Net SDK to manage the firewall on an application service using a client secret that can be distributed with an application.
Here is the manifest
...ANSWER
Answered 2021-Jun-15 at 10:11Okay, so you want an app registration to manage an App Service through Azure Resource Management API as itself with client credentials flow? In that case you don't need to assign any application permissions to your app. You need to create the app, and then go to e.g. the App Service resource's Access Control (IAM) tab, and add the needed role to your app there.
The reason that the app permissions tab there is grey is because the Azure Service Management app registration (which you can't edit) does not define any app permissions. When you define an app permission in the manifest, that becomes a permission that other applications could use to call your API, not Azure Resource Management API.
QUESTION
I am receiving the error "The query references an object that is not supported in distributed processing mode" when using the HASHBYTES() function to hash rows in Synapse Serverless SQL Pool.
The end goal is to parse the json and store it as parquet along with a hash of the json document. The hash will be used in future imports of new snapshots to identify differentials.
Here is a sample query that produces the error:
...ANSWER
Answered 2021-Jan-06 at 11:19Jason, I'm sorry, hashbytes() is not supported against external tables.
QUESTION
My girlfriend was asked the below question in an interview:
We trigger 5 independent APIs simultaneously. Once they have all completed, we want to trigger a function. How will you design a system to do this?
My girlfriend replied she will use a flag variable, but the interviewer was evidently not happy with it.
So, is there a good way in which this could be handled (in a distributed context)? Note that each of the 5 API calls are made by different servers and the function to be triggered is on a 6th server.
...ANSWER
Answered 2021-Jun-13 at 23:34If I were asked this, my first thought would be to use promises/futures. The idea behind them is that you can execute time-consuming operations asynchronously and they will somehow notify you when they've completed, either successfully or unsuccessfully, typically by calling a callback function. So the first step is to spawn five asynchronous tasks and get five promises.
Then I would join the five promises together, creating a unified promise that represents the five separate tasks. In JavaScript I might call Promise.all()
; in Java I would use CompletableFuture.allOf()
.
I would want to make sure to handle both success and failure. The combined promise should succeed if all of the API calls succeed and fail if any of them fail. If any fail there should be appropriate error handling/reporting. What happens if multiple calls fail? How would a mix of successes and failures be reported? These would be design points to mention, though not necessarily solve during the interview.
Promises and futures typically have modular layering system that would allow edge cases like timeouts to be handled by chaining handlers together. If done right, timeouts could become just another error condition that would be naturally handled by the error handling already in place.
This solution would not require any state to be shared across threads, so I would not have to worry about mutexes or deadlocks or other thread synchronization problems.
She said she would use a flag variable to keep track of the number of API calls have returned.
One thing that makes great interviewees stand out is their ability to anticipate follow-up questions and explain details before they are asked. The best answers are fully fleshed out. They demonstrate that one has thought through one's answer in detail, and they have minimal handwaving.
When I read the above I have a slew of follow-up questions:
- How will she know when each API call has returned? Is she waiting for a function call to return, a callback to be called, an event to be fired, or a promise to complete?
- How is she causing all of the API calls to be executed concurrently? Is there multithreading, a fork-join pool, multiprocessing, or asynchronous execution?
- Flag variables are booleans. Is she really using a flag, or does she mean a counter?
- What is the variable tracking and what code is updating it?
- What is monitoring the variable, what condition is it checking, and what's it doing when the condition is reached?
- If using multithreading, how is she handling synchronization?
- How will she handle edge cases such API calls failing, or timing out?
A flag variable might lead to a workable solution or it might lead nowhere. The only way an interviewer will know which it is is if she thinks about and proactively discusses these various questions. Otherwise, the interviewer will have to pepper her with follow-up questions, and will likely lower their evaluation of her.
When I interview people, my mental grades are something like:
- S — Solution works and they addressed all issues without prompting.
- A — Solution works, follow-up questions answered satisfactorily.
- B — Solution works, explained well, but there's a better solution that more experienced devs would find.
- C — What they said is okay, but their depth of knowledge is lacking.
- F — Their answer is flat out incorrect, or getting them to explain their answer was like pulling teeth.
QUESTION
This is how my data looks like:
...ANSWER
Answered 2021-Jun-13 at 21:46If I understand your question the right way, you could use dplyr
and tidyr
:
QUESTION
I'm running a hour long computation that fetches an external API, process it and save to a dataframe. The API is using Python's request library.
By tweaking the request lib, I managed to fend off problems related to retries and reading errors, but not all possible problems are handled, of course.
Everytime the API fails, my computation just stops, and I lose one hour worth of work.
I'm calling dask like this:
...ANSWER
Answered 2021-Jun-13 at 13:13By running .compute
on the dask dataframe you are converting it into a pandas dataframe in memory. If you want a future object, then you can run:
QUESTION
I've been trying to adapt my code to utilize Dask to utilize multiple machines for processing. While the initial data load is not time-consuming, the subsequent processing takes roughly 12 hours on an 8-core i5. This isn't ideal and figured that using Dask to help spread the processing across machines would be beneficial. The following code works fine with the standard Pandas approach:
...ANSWER
Answered 2021-Jun-13 at 07:02Every time you call .compute()
on Dask dataframe/series, it converts it into pandas
. So what is happening in this line
artists["name"] = artists["name"].astype(str).compute()
is that you are computing the string column and then assigning pandas
series to a dask series (without ensuring alignment of partitions). The solution is to call .compute()
only on the final result, while intermediate steps can use regular pandas
syntax:
QUESTION
I have got a Spring Boot project with two data sources, one DB2 and one Postgres. I configured that, but have a problem:
The auto-detection for the database type does not work on the DB2 (in any project) unless I specify the database dialect using spring.jpa.database-platform = org.hibernate.dialect.DB2390Dialect
.
But how do I specify that for only one of the database connections? Or how do I specify the other one independently?
Additional info to give you more info on my project structure: I seperated the databases roughly according to this tutorial, although I do not use the ChainedTransactionManager: https://medium.com/preplaced/distributed-transaction-management-for-multiple-databases-with-springboot-jpa-and-hibernate-cde4e1b298e4 I use the same basic project structure and almost unchanged configuration files.
...ANSWER
Answered 2021-Jun-12 at 23:21Ok, I found the answer myself and want to post it for the case that anyone else has the same question.
The answer lies in the config file for each database, i.e. the DB2Config.java file mentioned in the tutorial mentioned in the question.
While I'm at it, I'll inadvertedly also answer the question "how do I manipulate any of the spring.jpa properties for several databases independently".
In the example, the following method gets called:
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Vulnerabilities
No vulnerabilities reported
Install distributed
You can use distributed like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.
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