idempotent

问题 I'm following the docs for Firestore here on Aggregation Queries. I couldn't help but notice that the cloud function solution wouldn't exactly work since it's not idempotent: numRatings is incremented and avgRating recomputed each time. Though this example could be made idempotent if there was also a separate document being stored for each new rating: you'd add a check if the user has already submitted a rating for the restaurant. Is there something I'm missing that makes this example

问题 I'm following the docs for Firestore here on Aggregation Queries. I couldn't help but notice that the cloud function solution wouldn't exactly work since it's not idempotent: numRatings is incremented and avgRating recomputed each time. Though this example could be made idempotent if there was also a separate document being stored for each new rating: you'd add a check if the user has already submitted a rating for the restaurant. Is there something I'm missing that makes this example

问题 I am using Kafka 1.0.1 in my application and I have started using the Idempotent Producer feature that was introduced in 0.11, and I've having trouble understanding the ordering guarantees when using the Idempontent feature. My producer's configuration is: enable.idempotence = true max.in.flight.requests.per.connection = 5 retries = 50 acks = all According to the documentation: retries Setting a value greater than zero will cause the client to resend any record whose send fails with a

问题 I am using Kafka 1.0.1 in my application and I have started using the Idempotent Producer feature that was introduced in 0.11, and I've having trouble understanding the ordering guarantees when using the Idempontent feature. My producer's configuration is: enable.idempotence = true max.in.flight.requests.per.connection = 5 retries = 50 acks = all According to the documentation: retries Setting a value greater than zero will cause the client to resend any record whose send fails with a

问题 I'm using Sidekiq to perform some heavy processing in the background. I looked online but couldn't find the answers to the following questions. I am using: Class.delay.use_method(listing_id) And then, inside the class, I have a self.use_method(listing_id) listing = Listing.find_by_id listing_id UserMailer.send_mail(listing) Class.call_example_function() Two questions: How do I make this function idempotent for the UserMailer sendmail? In other words, in case the delayed method runs twice, how

问题 I'm working on a voting app, where the user can upload a list of email addresses for all of the voters. After doing some error checking, I create a Voter entity for each voter. Since there can be a large number of voters, I create the Voter entities in a taskqueue to avoid the 30 second limit and the task looks like this: put_list = [] for email, id in itertools.izip(voter_emails, uuids): put_list.append(Voter(election = election, email = email, uuid = id)) election.txt_voters = "" put_list

问题 I am trying to list all installed packages on my Debian 7/8/9 machines. There are easy ways dealing with it using apt or dpkg but I could not find a proper way to do this with ansible out of the box. Is there a nice and smooth way to do this? For RHEL machines I found this Post: How to get the installed yum packages with Ansible? 回答1: It doesn't look like Ansible provides any modules that would support this. You'll have to use shell or command . - name: Get packages shell: dpkg-query -f '$

问题 So I'm doing some testing with Ansible to manage Cisco devices (specifically a 3750 in this case). I'm able to add my VLAN's and Loopbacks with no issue. Just trying to get Ansible to stop registering a change in the task when the Loopback or VLAN exists. Right now my play looks like this: - name: Set the IP for Loop 0 ios_config: provider: "{{ connection }}" lines: - description AnsibleLoop0 - ip address 8.8.8.8 255.255.255.0 before: - interface Loopback0 match: exact Anytime this task is

问题 I'm using Firestore at beta version with Cloud Functions. In my app I need to trigger a function that listens for an onCreate event at /company/{id}/point/{id} and performs an insert (collection('event').add({...})) My problem is: Cloud Functions with Firestore require an idempotent function. I don't know how to ensure that if my function triggers two times in a row with the same event, I won't add two documents with the same data. I've found that context.eventId could handle that problem,

问题 I am trying to test salt-cloud saltify to deploy/install salt-minions on target machines. I created three vagrant machines and names them master , minion-01 and minion-02 . all the machines were same like this; root@master:/home/vagrant# lsb_release -a No LSB modules are available. Distributor ID: Ubuntu Description: Ubuntu 14.04.4 LTS Release: 14.04 Codename: trusty then on master I followed this http://repo.saltstack.com/#ubuntu to install salt-master(manually ofcourse). then in master I