Linode is down again • Hacker News Board

Re: Linode is down again

#11

Post by eekfuh » Tue, Nov 23, 2010, 5:15 PM UTC

aberkowitz wrote: post #6

mike-cardwell wrote: post #3

Earlier quoted context omitted.

Have they broken your SLA?

Linode has a 99.99% uptime guarantee, which amounts to 43 minutes and 12 seconds offline in a 30 day month. While I don't have a Linode in Freemont, their status page appears to indicate, at minimum, 1 hour of downtime. As repayment for the inconvenience, users get the lost time added to their balance.

Actually their SLA is only 99.9% uptime. Thats 525 minutes.

Re: Linode is down again

#12

Post by schwanksta » Tue, Nov 23, 2010, 5:18 PM UTC

My Linode slice is in Atlanta, not Freemont, and it went down once today and once earlier this week.

Re: Linode is down again

#13

Post by WillyF » Tue, Nov 23, 2010, 5:21 PM UTC

aberkowitz wrote: post #6

mike-cardwell wrote: post #3

Earlier quoted context omitted.

Have they broken your SLA?

Linode has a 99.99% uptime guarantee, which amounts to 43 minutes and 12 seconds offline in a 30 day month. While I don't have a Linode in Freemont, their status page appears to indicate, at minimum, 1 hour of downtime. As repayment for the inconvenience, users get the lost time added to their balance.

A 99.99% uptime guarantee would be 4.32 minutes per month. You calculated for a 99.9% uptime guarantee.

Re: Linode is down again

#14

Post by rbranson » Tue, Nov 23, 2010, 5:22 PM UTC

Remember guys & gals: this can happen to you. I am a fanatical Linode customer, and they are, in general, an extremely rock solid service, but that doesn't alleviate my responsibility to ensure my application is available regardless of datacenter outage. Power outages happen to EVERY datacenter. There are some very well documented and understood ways to alleviate this problem.

Re: Linode is down again

#15

Post by lwhi » Tue, Nov 23, 2010, 5:23 PM UTC

My London node was down briefly two days ago .. same happened about a month ago - is this a reason to worry?

Re: Linode is down again

#16

Post by tshtf » Tue, Nov 23, 2010, 5:29 PM UTC

aberkowitz wrote: post #6

mike-cardwell wrote: post #3

Earlier quoted context omitted.

Have they broken your SLA?

Linode has a 99.99% uptime guarantee, which amounts to 43 minutes and 12 seconds offline in a 30 day month. While I don't have a Linode in Freemont, their status page appears to indicate, at minimum, 1 hour of downtime. As repayment for the inconvenience, users get the lost time added to their balance.

With 99.99% uptime:

.0001 * 30 * 24 * 60 = 4.32 minutes

With 99.9% uptime:

.001 * 30 * 24 * 60 = 43.2 minutes

Re: Linode is down again

#17

Post by KaeseEs » Tue, Nov 23, 2010, 5:29 PM UTC

rbranson wrote: post #14

Remember guys & gals: this can happen to you. I am a fanatical Linode customer, and they are, in general, an extremely rock solid service, but that doesn't alleviate my responsibility to ensure my application is available regardless of datacenter outage. Power outages happen to EVERY datacenter. There are some very well documented and understood ways to alleviate this problem.

Care to enumerate a few of them?

Re: Linode is down again

#18

Post by al_james » Tue, Nov 23, 2010, 5:40 PM UTC

KaeseEs wrote: post #17

rbranson wrote: post #14

Remember guys & gals: this can happen to you. I am a fanatical Linode customer, and they are, in general, an extremely rock solid service, but that doesn't alleviate my responsibility to ensure my application is available regardless of datacenter outage. Power outages happen to EVERY datacenter. There are some very well documented and understood ways to alleviate this problem.

Care to enumerate a few of them?

More than one server across multiple datacenters is the only way. The use either a load balancer (which brings its own problems) or some kind of status aware DNS scheme to route traffic to live servers.

I wish linode would offer some kind of high availability load balancing like amazon ec2 does, that really is a killer feature.

Re: Linode is down again

#19

Post by ahyes » Tue, Nov 23, 2010, 5:42 PM UTC

rbranson wrote: post #14

Remember guys & gals: this can happen to you. I am a fanatical Linode customer, and they are, in general, an extremely rock solid service, but that doesn't alleviate my responsibility to ensure my application is available regardless of datacenter outage. Power outages happen to EVERY datacenter. There are some very well documented and understood ways to alleviate this problem.

Could you provide an always-reliable example? Even anycast has it's downfalls (rogue networks advertising blocks & rerouting traffic onto their networks, security disaster). Most clustered setups rely on a central storage, and if your storage box loses connectivity, your site will be down. Additionally, if you're going to recommend mirroring san content to an identical box at a third party datacenter, the cost of transferring that is going to cost you a boatload of money in bandwidth bills, every single month.

Re: Linode is down again

#20

Post by rbranson » Tue, Nov 23, 2010, 5:46 PM UTC

KaeseEs wrote: post #17

rbranson wrote: post #14

Remember guys & gals: this can happen to you. I am a fanatical Linode customer, and they are, in general, an extremely rock solid service, but that doesn't alleviate my responsibility to ensure my application is available regardless of datacenter outage. Power outages happen to EVERY datacenter. There are some very well documented and understood ways to alleviate this problem.

Care to enumerate a few of them?

Simple: distribute your application across two isolated datacenters. I'm not trying to downplay the complexity of doing this, as I fully understand the amount of effort required. If the cost of being down for an hour or two isn't significant enough to warrant this level of effort, then a power outage caused by Linode's datacenter vendor probably isn't going to really cost you much either.