Power or network failure that causes downtime accross a large number of platforms. Blackout.

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3
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1answer
15 views

How to enter past outage timing in OpenNMS

For scheduled outages, We need to enter timings so that these period will not be considered as a down time. So far so good. However, if someone doesnt define a blackout window and we need to adjust ...
0
votes
1answer
276 views

Temporarily website outages, fastcgi PHP communication abborted

I've noticed that my web server has occasional 1-5 minute outages every day. I've checked the Apache error log and found the following: [Sun May 10 14:13:19.299784 2015] [fastcgi:error] [pid ...
0
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0answers
87 views

Multicast clients successfully join but dont receive any data

Let me start by saying I just have a conceptual knowledge of how the physical networking side of things work so please bear with me. I have a few clients that subscribe to multiple multicast groups ...
0
votes
1answer
96 views

Guest VMs Unknown after power outage on HP VSA

A remote office had a power outage tonight. When the power came up, both the Physical DC and the Physical ESXi Server came up. Connecting to vSphere, I can see the HP-VSA has started, but the other ...
0
votes
2answers
426 views

Can Redis RDB corrupt?

In redis.io site, it states that RDB is less durable than AOF. Does this mean there is some possibility of database corruption, and complete data loss if power is lost during a save operation?
0
votes
1answer
921 views

How to forward to Amazon S3 when in maintenance mode with nginx using 503?

During website maintenance, it is sometimes necessary to shutdown our website. Our current method is to touch a file which will trigger the web server (nginx) to redirect traffic to a maintenance ...
0
votes
0answers
1k views

Losing internet connectivity on server after installing LogMeIn Hamachi (with server set as gateway node)

Our domain controller (SBS 2003) completely lost internet and network connectivity yesterday after I remotely installed LogMeIn Hamachi on it and set it to be a gateway node- in an attempt to create a ...
1
vote
2answers
136 views

Recurring server outages CentOS on Linode

I am currently managing some servers for a client running close to 40 websites, nearly half of which are WordPress websites. We are currently using 4 VPS from Linode with the sites distributed across ...
2
votes
5answers
278 views

VOIP Power outage strategy

In the past 2 years, we have had 4 instances where we have been without power for a period of 4-6 hours - due to construction crews cutting power lines, car accidents involving downed power lines, ...
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votes
2answers
78 views

Exchange fallover during power outage

Ok, I have yet to find a definitive answer for this. I have an exchange server, and am trying to find a good fallover solution. If the power goes out what is the best way for me to hold my email until ...
0
votes
1answer
420 views

What is a “Latency Outage”? [closed]

I'm one of many customers of Windstream, the only internet provider in my area, and just after having hit the 1-year mark of being a customer, my 10M internet connection became about a 512k ...
2
votes
1answer
1k views

BES 5.x issues when connecting to Exchange 2010 SP2 RU4

Ever since we updated from SP1 RU4 to SP2 RU4 we have noticed that our BES devices will simply stop receiving email. This has occurred at least 5 times in the past few weeks. Today, while speaking ...
6
votes
1answer
4k views

I had a power outage. Now MySQL's lock file won't go away. What do you suggest?

I do freelance IT consulting for various clients, both in Toronto, Canada, and worldwide. A client recently experienced a power failure. Now they've been having various problems with a Slackware ...
2
votes
2answers
475 views

Network outage - Mapping, Checking network, BGP, Traceroute, RIPE

At first, I'm not able to name my question properly, so this will be adjusted I recently experienced an international network gap. Mean when some part of world wide network is unavailable. I'm ...
1
vote
1answer
74 views

Mysql password no longer working

Does anyone know if a power outage could somehow have corrupt the mysql logins? We had an outage the other day, my mysql logins no longer work. The mysql process seems to be running fine. Any idea ...
0
votes
2answers
74 views

SMTP Servers: How well supported is automatic reattempt when receiving connection refused?

When a mail server gives Connection Refused, emails will come through in future attempts assuming the mail server comes back online. How well supported is this? Do all mail servers support this? Is it ...
2
votes
1answer
613 views

Actions to take during/after a power outage

We're in the process of replacing the shelving in our server room, and I found a piece of paper that had been covered over which lists various actions to take during/after a power outage: ADSL modem ...
1
vote
1answer
1k views

How to determine the cause of service outages on vmware virtual hosts

I am trying to determine the cause of outages i have experienced on an irregular basis with several of my virtual servers which run on vmware esxi4. I have 12 virtual servers spread across 2 esxi host ...
1
vote
1answer
659 views

Migrating away from Rackspace (slicehost) to Amazon

After yet another Rackspace outage (ongoing as I type this, no ETA) I'm forced to look at options. Rackspace has simply not delivered the uptime that my customers expect and I'll admit that I'm ...
0
votes
1answer
472 views

Cisco 851 (IOS) router: FastEthernet 4 (WAN) got the shutdown flag

At a customer location there was a Cisco 851 router (which uses IOS). The PCs on location were all of a sudden unable to connect. We came on site and found that FastEthernet 4 (the WAN port) was ...
7
votes
6answers
388 views

What's the major outage you've been part of?

Outages are some of the things that we try to avoid but they're inevitable: they happen (very rarely, we hope) and we have to know how to deal with them (and learn from them). So, what's the major ...
12
votes
1answer
339 views

What HTTP status should I return during temporary site outage/downtime?

I'm going to be taking down my website for an upgrade to the code. I'd like to have a temporary downtime page display during the upgrade. For the sake of preventing issues with bots attempting to ...
12
votes
4answers
2k views

Documenting an outage for a post-mortem review

We had a rather serious outage this past week affecting several services which put us out of our SLA with customers. Now that everything has been resolved, I am conducting a post-mortem review. From ...
5
votes
3answers
502 views

How do I update DNS without causing an outage?

If I change a computer's IP address, it can take a long time for ISP's to stop caching the results. Is there a way to mitigate this, if I plan ahead?
3
votes
5answers
817 views

What's the best way to Notify network users of outages or maintenance

There are times when one of our applications is down for maintenance and we'd like to let our users know about it before they start flooding our help desk with calls. What's the best way to notify ...