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Questions tagged [downtime]

The term downtime is used to refer to periods when a system is unavailable.

Downtime refers to a period of time that a system fails to provide or perform its primary function.

Reliability, availability, recovery and unavailability are related concepts. The unavailability is the proportion of a time-span that a system is unavailable or offline. This is usually a result of the system failing to function because of an unplanned event, or because of routine maintenance (a planned event).

The term is commonly applied to networks and servers. The term is also commonly applied in industrial environments in relation to failures in industrial production equipment.

Some facilities measure the downtime incurred during a work shift, or during a 12 or 24-hour period. Another common practice is to identify each downtime event as having an operational, electrical or mechanical origin.

The opposite of downtime is uptime.

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How can I imitate or trigger server failure for testing server-to-server communication?

Say I have a backend server for my MVVM website, which needs to communicate with a data processing server. If one server goes down, the other is supposed to know how to handle that (save the files it wants to transfer, and wait until the server…
Fallen Asleep
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Apache server gets unreachable on a sudden

I'm not sure on which kind of community to post this question, but as i thought it could be a bug, i'll take a chance. Let me start with my situation. I've got a webserver (apache) running at home for over the last 3-4 years. First started off with…
Wouter Janssen
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Elasticsearch upgrade from 0.90.7 to 1.7.1 on live system

So I have a rather simple Node.js application running on a single server, using mongoDB as primary database and elasticsearch as a "replica set" with only search-relevant fields indexed in ES. I need the upgrade, because the older version conflicts…
BenMann
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Cassandra's nodetool repair appears to cause outages

I have a 4 node Cassandra cluster that didn't see a repair() for about 8 months, in between administrators. It doesn't see much in the way of deletes. I've noticed that when I run nodetool repair, the system will not accept new data, and nobody can…
Charles Cowart
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On updating a Spring XD module

I've been evaluating Spring XD for a major project and I'm wondering how to update module code with zero downtime. It seems that, for updating a module, it first needs to be deleted. And deleting a module implies destroying streams. Several ideas…
thiago
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Best way to optimize MySQL operations after a table grows

Background info: we run a an e-commerce website and are trying to figure out what is the best way to deal with "historical" data for tables that are used very frequently and are bound too contain a lot of records (ie. orders, customers, etc). I am…
odino
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Elastic Beanstalk rolling update timeout not honored

I am trying to achieve zero down time redeploys on AWS elastic beanstalk. I basically have two instances on my environment coupled with Jenkins for CI (Using Tomcat). What I am trying to achieve is each time I trigger a redeploy from Jenkins, only…
maxsap
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Issues wih the Twitter API

Ok I have been signing in with twitter through the API using PHP for awhile. However today I have had nothing but issues in getting a connection! Has something changed with the Twitter API???
JustSteveKing
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PostgreSQL high availability on Openshift gear

I have been testing the Openshift Online platform for several months now (using the free 3 gears option). I setup several python applications and also the very basic python application (just using the Openshift python template) and outside…
Radek
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How to rdirect to some another page on another website using IIS 7?

I have a website which is used by a number of users, when we tried to update some new changes it always has some downtime. Now i want to display a page which is hosted on some other server or domain using IIS settings, is it possible. I know i can…
Ram Singh
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Can downtime be solved with multiple servers?

I have tried many hosting services and they all have the downtime problem. Now, i am well aware that downtime is inevitable and will happend eventually, but i have been wandering if a website can be hosted in multiple hostings to solve this…
user3338083
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waitMsg message in ExtJS

I'm using Ext.getCmp('my_form').submit( { url: 'http://does-not-respond.onion/', method : 'POST', waitMsg : 'Please wait...', timeout: 5, params : { The "Please wait" window doesn't disappear. How I can make it disappear and alert a…
ilhan
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Why is my wordpress website so slow and am I having so much downtime?

I have used Yslow and PageSpeed to find the cause, but I can't seem to figure out why my blog http://www.fotokringarnhem.nl sometimes loads blazing fast (cached files I guess), and other times takes about 10 seconds or longer to load. I am on a…
Daniël Tulp
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LearnBoost's Up for Node.js doesn't seem to restart my apps correctly?

I've been using LearnBoost's Up for Node.js as a way for me to have zero-downtime when I'm changing or uploading new code for my projects. Because my projects are using web sockets (via Socket.io) I don't want my app to cold reload as those…
littlejim84
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Data migration issue on live enviroment

I am planning to migrate data which resides in oracle database to a CMDB application database. Since the database is not visible for end users/Developers of CMDB, we use API to import data into CMDB. Currently my issues is , i cannot shutdown the…
SmartestVEGA
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