rate-limit | General purpose rate limiter implementation | Identity Management library
kandi X-RAY | rate-limit Summary
kandi X-RAY | rate-limit Summary
General purpose rate limiter that can be used to limit the rate at which certain operation can be performed. Default implementation uses Redis as backend.
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rate-limit Key Features
rate-limit Examples and Code Snippets
public void incrementCounter(String id, String timeUnit, Date time) {
BoundStatement stmt = rateLimitingIncrement.bind();
stmt.setString("id", id);
stmt.setString("time_unit", timeUnit);
stmt.setTimestamp("time", time)
Community Discussions
Trending Discussions on rate-limit
QUESTION
I would like the program/script to stop/wait after "console.log ('3')" until you click "Finished!" (and prior download of data from the above form). Clicking this button would be equivalent to restarting the program / script from "console.log ('4')". How can this be achieved?
code in app.js:
...ANSWER
Answered 2022-Apr-01 at 12:21use on click event handler in form. It will only submit the form when submit event will occur.
use onsubmit in form tag and an event handler in js.
QUESTION
I develop a highly loaded application that reads data from DynamoDB on-demand table. Let's say it constantly performs around 500 reads per second.
From time to time I need to upload a large dataset into the database (100 million records). I use python, spark and audienceproject/spark-dynamodb
. I set throughput=40k and use BatchWriteItem()
for data writing.
In the beginning, I observe some write throttled requests and write capacity is only 4k but then upscaling takes place, and write capacity goes up.
Questions:
- Does intensive writing affects reading in the case of on-demand tables? Does autoscaling work independently for reading/writing?
- Is it fine to set large throughput for a short period of time? As far as I see the cost is the same in the case of on-demand tables. What are the potential issues?
- I observe some throttled requests but eventually, all the data is successfully uploaded. How can this be explained? I suggest that the client I use has advanced rate-limiting logic and I didn't manage to find a clear answer so far.
ANSWER
Answered 2022-Mar-29 at 15:28That's a lot of questions in one question, you'll get a high level answer.
DynamoDB scales by increasing the number of partitions. Each item is stored on a partition. Each partition can handle:
- up to 3000 Read Capacity Units
- up to 1000 Write Capacity Units
- up to 10 GB of data
As soon as any of these limits is reached, the partition is split into two and the items are redistributed. This happens until there is sufficient capacity available to meet demand. You don't control how that happens, it's a managed service that does this in the background.
The number of partitions only ever grows.
Based on this information we can address your questions:
-
Does intensive writing affects reading in the case of on-demand tables? Does autoscaling work independently for reading/writing?
The scaling mechanism is the same for read and write activity, but the scaling point differs as mentioned above. In an on-demand table AutoScaling is not involved, that's only for tables with provisioned throughput. You shouldn't notice an impact on your reads here.
-
Is it fine to set large throughput for a short period of time? As far as I see the cost is the same in the case of on-demand tables. What are the potential issues?
I assume you set the throughput that spark can use as a budget for writing, it won't have that much of an impact on on-demand tables. It's information, it can use internally to decide how much parallelization is possible.
-
I observe some throttled requests but eventually, all the data is successfully uploaded. How can this be explained? I suggest that the client I use has advanced rate-limiting logic and I didn't manage to find a clear answer so far.
If the client uses BatchWriteItem, it will get a list of items that couldn't be written for each request and can enqueue them again. Exponential backoff may be involved but that is an implementation detail. It's not magic, you just have to keep track of which items you've successfully written and enqueue those that you haven't again until the "to-write" queue is empty.
QUESTION
I ran into a problem where my AJAX request fails with error code 401 - Unauthorized, while trying to get an OAuth2 (Okta) Token.
The preview tab shows an error as follows:
...ANSWER
Answered 2022-Mar-20 at 16:51Trace your request with Fiddler, also client side client credentials is not supported by Okta from browser, has to be at server level. Check this - https://support.okta.com/help/s/article/Browser-requests-to-the-token-endpoint-must-use-Proof-Key-for-Code-Exchange?language=en_US
The reason I said to trace with Fiddler is so that you can confirm if origin header is being sent or not when using postman vs from ajax and therefore, confirm that you are running into the issue mentioned in the link I pasted.
QUESTION
I'm deploying my dockerized Django app using AWS Code Pipeline but facing some errors of Docker.
error:
...ANSWER
Answered 2022-Mar-03 at 12:50Docker Hub limits the number of Docker image downloads (“pulls”) based on the account type of the user pulling the image. Pull rates limits are based on individual IP address. For anonymous users, the rate limit is set to 100 pulls per 6 hours per IP address. For authenticated users, it is 200 pulls per 6 hour period. There are no limits for users with a paid Docker subscription.
Docker Pro and Docker Team accounts enable 5,000 pulls in a 24 hour period from Docker Hub.
Please read:
QUESTION
I am running a Spring Boot app that uses WebClient for both non-blocking and blocking HTTP requests. After the app has run for some time, all outgoing HTTP requests seem to get stuck.
WebClient is used to send requests to multiple hosts, but as an example, here is how it is initialized and used to send requests to Telegram:
WebClientConfig:
...ANSWER
Answered 2021-Dec-20 at 14:25I would propose to take a look in the RateLimiter direction. Maybe it does not work as expected, depending on the number of requests your application does over time. From the Javadoc for Ratelimiter: "It is important to note that the number of permits requested never affects the throttling of the request itself ... but it affects the throttling of the next request. I.e., if an expensive task arrives at an idle RateLimiter, it will be granted immediately, but it is the next request that will experience extra throttling, thus paying for the cost of the expensive task." Also helpful might be this discussion: github or github
I could imaginge there is some throttling adding up or other effect in the RateLimiter, i would try to play around with it and make sure this thing really works the way you want. Alternatively, consider using Spring @Scheduled to read from your queue. You might want to spice it up using embedded JMS for further goodies (message persistence etc).
QUESTION
I have a use case to use single policy.xml for different environments however the rate-limit is applicable only for certain environment.
For eg:
Dev: rate-limit is applicable (hosted in dev azure subscription)
QA: rate-limit is not applicable (hosted in test azure subscription)
Prod: rate-limit is applicable (hosted in prod azure subscription)
Update: Tried this from one of the posts here post:
...ANSWER
Answered 2022-Feb-15 at 16:031.The subscription key based approach is below.
You can define a subscription key on each of the environmen. In the below example i am creating a subscrption named dev
on dev environment and prod
on prod environment. You can check this link to understand how to create a subscription key. Once you creaete subscription keys on all three environment. You can add the following policy to your inbound policies.
QUESTION
I updated my composer.json file to reflect the 6.0.* changes, and ran my composer update "symfony/*"
code, and it returned this:
ANSWER
Answered 2022-Feb-10 at 21:35That composer.json file is a bit of a mess. Some Symfony packages on 5.3, some even on 5.1, and many on 6.
Also you are controlling Symfony versioning from extra.symfony.require
, and at the same time from the discrete version constraints. You include some packages that no longer exist on 6.0 (symfony/security-guard
), and are missing some that should be installed on a 6.0 version.
It's simply not on an installable state.
I've managed to make it installable changing it like this:
QUESTION
I'm using F# and have an AsyncSeq<'t>>
. Each item will take a varying amount of time to process and does I/O that's rate-limited.
I want to run all the operations in parallel and then pass them down the chain as an AsyncSeq<'t>
so I can perform further manipulations on them and ultimately AsyncSeq.fold
them into a final outcome.
The following AsyncSeq
operations almost meet my needs:
mapAsyncParallel
- does the parallelism, but it's unconstrained, (and I don't need the order preserved)iterAsyncParallelThrottled
- parallel and has a max degree of parallelism but doesn't let me return results (and I don't need the order preserved)
What I really need is like a mapAsyncParallelThrottled
. But, to be more precise, really the operation would be entitled mapAsyncParallelThrottledUnordered
.
Things I'm considering:
- use
mapAsyncParallel
but use aSemaphore
within the function to constrain the parallelism myself, which is probably not going to be optimal in terms of concurrency, and due to buffering the results to reorder them. - use
iterAsyncParallelThrottled
and do some ugly folding of the results into an accumulator as they arrive guarded by a lock kinda like this - but I don't need the ordering so it won't be optimal. - build what I need by enumerating the source and emitting results via
AsyncSeqSrc
like this. I'd probably have a set ofAsync.StartAsTask
tasks in flight and start more after eachTask.WaitAny
gives me something toAsyncSeqSrc.put
until I reach themaxDegreeOfParallelism
Surely I'm missing a simple answer and there's a better way?
Failing that, would love someone to sanity check my option 3 in either direction!
I'm open to using AsyncSeq.toAsyncEnum
and then use an IAsyncEnumerable
way of achieving the same outcome if that exists, though ideally without getting into TPL DataFlow or RX land if it can be avoided (I've done extensive SO searching for that without results...).
ANSWER
Answered 2022-Feb-10 at 10:35If I'm understanding your requirements then something like this will work. It effectively combines the iter unordered with a channel to allow a mapping instead.
QUESTION
I have upgraded my angular to angular 13. when I run to build SSR it gives me following error.
...ANSWER
Answered 2022-Jan-22 at 05:29I just solve this issue by correcting the RxJS version to 7.4.0
. I hope this can solve others issue as well.
QUESTION
I've got a rate-limited endpoint I'm querying, and so I need to make KDB pause between requests. Is there a way I can block the current thread?
...ANSWER
Answered 2022-Jan-21 at 17:28You can use
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