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0answers
79 views

NewRelic Availability Monitoring of Third Party Service

Background NewRelic offers availability monitoring whereby you can specify a ping URL for an application and have NewRelic send HTTP GET requests to that URL and GREP the response for selected text, ...
1
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0answers
22 views

Amazon EC2 instance was not available for few minutes (amazon showed that everything ok)

Few minutes ago my amazon Ec2 instance was unavailable for a few minutes. During this time neither I was able to connect to web-site with http, nor I was able to ssh to it. Also I was not able to ...
0
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3answers
112 views

SOA architecture requires 99.9% availability -> 9hrs max downtime -> physical architecture mapping?

External architects have designed an architecture for a Service-Oriented Architecture environment. They fixed the availability to be 99.9%, equivalent to max 9 hrs downtime [per year]. Where can I ...
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0answers
103 views

hdparm: Hard drive spin down logs

I've been using hdparm successfully to spin down hard drives on some systems, however I'm curious, is there anyway I can make hdparm generate some kind of spin down log, so I can further optimize the ...
1
vote
1answer
84 views

Website not available everywhere

Today I noticed my website http://mint-nachhilfe.ch/ was down, but other people (located in different networks) said it looks up from there. When I came home, I double-checked, and I can really reach ...
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1answer
46 views

Using Dynamic DNS for server reboots

Basically, I want all the traffic to go to one server while the other reboots. Here's the environment: Two or more VPS servers. Same datacenter, but no internal ip or lan, and no shared ip. I was ...
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1answer
87 views

Choosing a database management system to maximize availability and scalability [closed]

If I was planning on choosing a database management system and know that the data needs to be available as close to 100% as possible and that it needs to scale as well as possible, is there a "best" ...
1
vote
1answer
240 views

How to check if redis master is OK?

On the documentation, they advice the monitor command. But it has a 50% performance penalty for the whole system, and how should I do that ? Whatching the ouput using SSH until I don't see anything ? ...
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2answers
108 views

Immortal application

(TL;DR: last paragraph) I'm running an online service and have thusfar been doing offline backups and simple monitoring to achieve resilience and availability. Resilience is rather manual but I'm ...
3
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1answer
688 views

Determine availability zone of AWS IP address

I'm currently using Heroku (which uses AWS) and my program needs to communicate with my own EC2 instance. I've made my EC2 instance in the same Region as Herokus', however, in order to reduce costs ...
69
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12answers
14k views

Is Ping a reliable way to check if a server is available?

In my application I am pinging a server and waiting for a response. I am using this to determine whether the server is available and responsive or not. Is this a reliable way of determining ...
2
votes
0answers
309 views

Exchange 2003 to 2010 migration: Can I remove free/busy public folder once all users are moved?

Now that all my mailboxes are on the 2010 server, can I remove the schedule+free/busy public folder? I am having scheduling synchronization issues, and I believe it may be at fault. All clients are ...
2
votes
5answers
312 views

Check availability of my websites

How can I check the availability of websites from hosted by company? Ping the server and checking if the services for IIS or Apache/Tomcat is not enough. I want to see if the sites are responsive, if ...
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votes
4answers
347 views

System Monitoring Redundancy

I consult in a small business environment where I have two HyperV hosts (with <10 VMs) + a couple other servers. I recently had an issue where one of the HyperV hosts had a CPU issue and it came ...
1
vote
1answer
147 views

Swapping db's to increase availability during database update

I have a SQL server database with data supplied from a 3rd party. They supply a tool to update the database data weekly. The tool is pretty old and uses ODBC. The update can take several hours. In ...
0
votes
4answers
306 views

ngnix reverse proxy

Most of the configuration and example I've seen out there, the backend server are either on the same machine or the same network network. Has any body done this with backend servers located in ...
0
votes
1answer
50 views

Fixing the accesibility of a webserver

I have my server, which is hosted in datacenter, and there is a website and a database installed on this server. DNS servers for the domain name are the default ones of the domain name registrator. ...
1
vote
2answers
88 views

http server connectivity puzzle

I have been seeing some strange connection issue in the production environment. The setup has two IBM Http Server's (IHS) and a network IP load-balancer in front of them (round-robin). One instance ...
1
vote
2answers
1k views

Lifetime of IIS worker process or AppDomain

I have an ASP.NET app hosted in IIS, and I have automatic worker process recycling/shutdown disabled. I'd like to have a rough idea of how long the app has been running continuously without being ...
3
votes
5answers
3k views

uptime.exe crashing on Windows Server 2008

Can anyone get uptime.exe to run either the /s or /p:n switches on a Windows Server 2008 box without crashing? I realise it's a NT tool and no longer supported, but it worked fine on 2003. I've ...
1
vote
2answers
236 views

How can I tell which package updates will require a reboot or service restart?

One of our boxes is running Ubuntu 8.04 LTS. Most Ubuntu package upgrades are trivial and don't affect availability much. How do I tell which packages are going to cause an outage before applying ...