Data center management diary-, data center 2014

Data center management diary-, data center 2014
I'm curious. Are there so many people surnamed Wang?

Lenovo's after-sales service has come several times, all of which are surnamed Wang. The master who arranged the line is also surnamed Wang... This reminds me of the amazing old Wang next door.

This morning, I encountered the following problems:

1 problem:

Because the vswitch plug-in is not enough, an additional vro is added. Two vswitches and one small route are connected by the main road, and the two vswitches and the small route are connected to the computer in the data center;

So the question is (which is the best excavator school ?...)

First, you have to modify the wan of the vro. Otherwise, the wan of the two routers conflict with 192.168.1.1 by default, which may cause some hosts to fail to access the network (not displayed this morning, I don't understand );

Solution:

Change the wan of the two routes to different ones. do not conflict with each other;

2. Problem:

Second, the problem arises when the operating system and software in the IDC are installed on the same network...

Large switches and large routes are both high-configuration and gigabit-level, so you don't have to worry about the speed of 20 Mbit/s (transfer a system for 15 minutes ), however, the simultaneous transmission speed of two computers with a small route is about KB (transfer to the same system for 2 hours), which seriously slows down the overall speed. The simultaneous transmission speed is the same as that of bottled water, the speed usually depends on the slowest one;

Solution:

For simultaneous transmission, separate transmission: first, transfer the large switch, and then plug the two lines into the large switch, separately for the two machines;

3. Problem:

Prevent students from being wireless;

Solution:

Hide wireless (implemented by disabling ssid broadcast) and set a password; see http://jingyan.baidu.com/article/154b463150a8b128cb8f416b.html

4. Problem:

Network cable problems: there are too many old connections, with the test found that the indicator light is so bright: 1 2 3 4 5 3 7 8

That is to say, 3 is highlighted twice, but 6 is not bright. After changing the crystal head many times, it is useless (I thought the problem of the crystal head at the beginning). It may be where the line 6 is broken down.

Solution:

Replace the location of Line 6 (Green Line) with the line at another location.

Principle:

Standard sequence of common network headers: Orange, orange, green, white, blue, blue, white, green, brown, white

We only use four, 1, 2, 3, and 6, namely, orange, orange, green, white, and green. As long as the four sequences and lines are smooth, there is no problem,

Now there is a problem with the green line, so I replaced it with other lines. I changed it to the order of orange, orange, blue, blue, brown, brown, green, and green, in this way, the problematic Green Line will not be used,

As a result, we can access the Internet normally .......................

What is the practice log of the Computer Management Room?

At the beginning, you should go to the data center for management. In the middle, there are some practical things in the management process. What difficulties have you encountered and how to solve them... finally, I had some feelings during my internship. In fact, they are all old routines, which are equivalent to practice reports. Many articles on the Internet are just like imitating one article.

Summer mathematics diary in the fourth grade of 2014

Uncover the mystery of a tea tray
Recently, we are learning about stereoscopic graphics. This caused me to think about the problem: most of the tea barrels are cylinders. Why? Is it polite or beautiful to make the tea tray into a cylinder? Or ...... No, no! I can't explain it! I made up my mind to uncover this fan. Today, I came to my family as an uncle who worships and calls him Zhuge Liang. I picked up the tea tray and was preparing to make tea to entertain him. Suddenly I had a chance and asked him, "Uncle, do you know why most of the tea trays are cylinders ?" My uncle asked me, "Let's talk about it first. Why? "I don't want my uncle to look down on me. I really want to find the correct answer based on what I learned. The time passed at 1 minute 1 second, and I was so anxious that I could not find the answer. At this moment, my uncle patted me on the shoulder and said to me, "you may wish to start with the figure with the same perimeter and the area of the circle is relatively large. After listening to my uncle's words, I suddenly realized that using a cylindrical tea can not only hold more tea leaves, but also save materials. After understanding this point, I contacted my real life and proved my thoughts through drawing. I told my uncle this idea, and his uncle gently stroked my head and said, "You are good at discovering mathematical problems in your real life and thinking about how to solve them. I believe that you will be the future of ZHUGE Liang '."

Life is inseparable from mathematics,
In the past, I always thought that learning "to find the least common factor" was boring. I had to deal with such problems all day, and I was really annoying, I always feel that learning this knowledge is useless in my life. However, one thing has changed my opinion. That was not long ago. Grandpa and I went to the Children's Palace by bus. The two of us are taking the three-way car. When we are about to depart, the one-way car will also depart with us at the same time. At this time, my grandfather looked at the two cars and suddenly smiled and said to me, "Xiao Yu, grandpa has a question to test you, OK ?" I answered with confidence: "OK !"" Well, if one car departs every 3 minutes, three cars depart every 5 minutes. How many minutes can the two vehicles start at the same time ?" I paused for a moment and said, "Grandpa, you cannot answer this question ." Grandpa looked at me doubtfully: "Oh, right ?"" There is still one condition for this question: the start station of a 1-way car and a 3-way car is the same place ." After hearing what I said, Grandpa suddenly patted his own smart and bald head and said with a smile, "when I was confused about this 'mathematical doctor ', my questions were not strict enough, I still think about it comprehensively." Grandpa and I laughed happily. At this time, my grandfather said, "Well, now we assume that the origin site is the same. How can you solve this problem ?" I thought about it and blurted out: "In another 15 minutes. Because 3 and 5 are mass numbers, the minimum public multiple of them is equal to the product of these two numbers (3 × 5 = 15), so 15 is the minimum public multiple of them. That is, two-way vehicles can depart in at least 15 minutes ." Grandpa praised me: "The answer is correct! 100 points ."" Yeah !" After listening to my grandfather, I raised my hands happily. From this incident, I understand the truth: mathematics is everywhere in real life.

Measurement area
Today, I am entangled in my brother to teach me how to learn swimming. My brother, who is busy with learning, is not entangled in me, so he puts forward the following requirement: "I will give you a 20 cm-long ruler, calculate the floor area of the living room within 5 minutes. If you can, I will teach you how to swim." "Hum! Isn't that difficult ?" I protest loudly. My brother smiled and said, "No way. If you don't test it, you won't take you swimming ."
To learn swimming, I recognize it. But it is really difficult to measure the length of the living room with the small ruler at, and to measure the area within 5 minutes! "Five minutes is very fast," said my brother gloating ."
I was so angry and anxious in my heart that I was so anxious to find a solution. I remembered the step-by-step test method that the teacher taught us. So I used the step test method for measurement. I walked three steps back and forth along the length of the living room, respectively 8 steps, 10 steps, 9 steps, so that the average, the length of the living room is nine steps. I used the same method to measure the width of 7 steps. Then I used a small ruler to measure the length of my step. I also tested it three times, the average value is 60 cm. Now I have obtained the full text of the client...>