Shulou(Shulou.com)06/02 Report--

Today, I will talk to you about whether the CVM will go down or not. Many people may not know much about it. In order to make you understand better, the editor has summarized the following for you. I hope you can get something from this article.

Yes, CVM generally runs 24 hours a day, and no brand of server can guarantee that its machine will never have a problem.

There are rules to follow in the cause of downtime.

Many servers go down in the middle of the night. One possible reason is that the server is busier at that time, why it is busy, because this time point is what we think is the business trough, so a lot of things are scheduled at this time. However, various batch backups lead to high IO,CPU utilization, various batch tasks lead to a sudden increase in system pressure, and a variety of batch query tasks make the hard disk much busier than usual.

The risk of downtime is naturally much higher, but to a large extent, it is reasonable. If you do not back up, you will lose data, if you do not synchronize data, you will be inconsistent, and if you do not process a lot of data in batches, you will not be able to update it in a timely manner. Therefore, this work is necessary in principle, but beyond reasonable, we need to check whether the work has been done well enough.

"fake" downtime in downtime

Sometimes there is an outage alarm, which is actually a fake outage of the CVM. Generally speaking, it can be divided into two aspects, on the one hand, the network jitter, at this time there will be an alarm storm. We will quickly be submerged in all kinds of alarms.

Some downtime alarms are fake downtime, mainly because the resource utilization is too high, for example, there are too many connections to fit even a ssh. Sometimes the system is under so much pressure that we don't have time to return a single command. Of course, there are a variety of reasons. One of the common types is the connection storm in the business, where there are so many connections that they can't respond directly.

Server overguaranteed replacement

This problem is a false proposition in many companies. If the server is overinsured, it should be replaced, but in terms of cost savings, it is not willing to retire the server directly. As a result, this phenomenon becomes natural, leading to the replacement of a new server that needs to be explained for more reasons.

After reading the above, do you have any further understanding of whether the CVM will go down now? If you want to know more knowledge or related content, please follow the industry information channel, thank you for your support.

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