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Questions tagged [availability]

149 questions
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What if we partition a C+A distributed system?

I've read this, this and this but still cannot understand the C+A category of the CAP theorem. I mean those system are not design to support partition that might occur. Eventually they can deal with the loss of some isolated nodes if there are…
Samuel
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Swift compile-time availability: non-available case

There is nice @available attribute in swift to test availability in compile-time. E.g. HKQuantityTypeIdentifierAppleExerciseTime identifier is available only since iOS 9.3, so if we want to use it we need check availability like this: @available(iOS…
Vladimir
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Bluemix: how to monitor and record app availability over long periods

Does anyone have experience monitoring and recording Bluemix availability over weeks to months? My initial plan to do this was to use the Monitoring and Analytics service to send event notifications to my email which I could collect and process.…
user3601646
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PHP Appointment Booking Available Time Slots

I'm developing an online booking system for a client where I need to find available appointment times that their customers can choose from to book their next appointment. I'll try to explain the current database setup: Table name: appointments -…
Guy Murray
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Docker: container exits, but it still looks like running

I have a Docker service (specifically MongoDB). After some kind of failure (specifically No space left on device), it gets weird: Command docker-compose logs --follow --tail=10 -t service-name exits and writes service-name exited with code 14. When…
v6ak
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Availability with Kubernetes

We run an internal a healthcheck of the service every 5 seconds. And we run Kubernetes liveness probes every 1 second. So in the worst scenario the Kubernetes loadbalancer has up-to-date information every 6 seconds. My question is what happens when…
Doru Popescu
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"This app is not available for any of your devices" for my Android Wearable app

I have been stuck in this for months and don't know if I am using the right tags but I'll try again hoping someone answers. I have developed a private wearable app for the company I work for. The Wearable app is standalone meaning it's only to…
Mohamed El Kayal
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Difference between Availability and Partition Tolerance in CAP Theorem

I know there's one same question on SO but I didn't find the answers there helpful. Availability says that the system will return a non-error response, even if one or more nodes in the system are down. Partition Tolerance means that the system will…
Odd
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Azure availability zone - How many zones are there in East US?

I understood that Azure supports availability zones for the following regions Following regions are supported for availability zones in Azure cloud as of now, Central US East US East US 2 West US 2 France Central North Europe UK South West…
One Developer
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SharePoint 2013 SQL cluster problem with secondary node

I have a SQL server cluster with two nodes. We've configured availability groups for databases, but there seems to be a weird issue. SharePoint Secure store database exists only on the secondary node and because of that, I cannot add this database…
antso777
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Display a custom message when a product is not purchassable in Woocommerce single pages

I am creating a website which is flower shop. Some flowers are seasonally available. Using Advanced Custom Fields plugin, I have added a custom field in Woocommerce product post type (check box) list of months to chose from in which product will be…
Muhammad Tauseef
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How do we measure the site availability?

To measure the availability of a web site / API, should the dependencies also be considered? For instance, assume the payment service is down; but the shopping site is still available. Here the customer is not able to complete the purchase since the…
programmer
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Availability calculation of a Event driven Microservice Architecture

I have 2 microservices - "A" produces some data which is event Sourced and is replicated in microservice "B". I have a UI which talks to an API sitting on top of microservice "B" which internally uses the replicated data from "A". I have done the…
Sriram Somasuntharam
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Cassandra WRITE=ALL and READ=ONE applicability

Given we have a 2x5 nodes setup (across 2 DC) and replication factor of 3, and the fact that we create views asynchronously (so we can safely retry failed operations) does using WRITE=ALL and READ=ONE make sense? If one replica fails, how can we…
kboom
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full calendar business hours(available date and time) set dynamically through date picker

I'm using FullCalendar and datepicker to set the availability(date and time) for the user. Once the user click on date and time (I'm getting fromdate,todate,fromtime,totime) the area should be available to book appointments and the rest of the area…
Karthiga Thavabalasubramanian
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