Technology and life: starting with solar cars

Chapter 61 Server
"Liu Yun, has the algorithm problem been solved? If not, I'll ask my former classmates. My former classmates should have someone who specializes in algorithms. Do you want to make an algorithm for Ni? I think the algorithm is safe. The performance won’t be too high, but it’s barely usable.” Liu Yun patted the dazed Liu Yun and asked.

Liu Jinwei graduated from a software major. Naturally, his classmates are all engaged in software, some have gone into game development, and some have changed careers.

How did he say that the relationship with his classmates was quite good back then, and it shouldn't be a big problem to ask for an algorithm.

"No need, I don't need the kind of algorithm I want, so it's better to spend money to buy it." Liu Yun flatly refused, cheap is not good, this is an eternal truth, besides, the company is not that miserable , It’s really impossible to buy an algorithm that is stronger than this.

Liu Jinwei suddenly realized, patted his head and said, "That's right, why did I forget that I can still buy an algorithm? Our company has so much money to buy an algorithm."

The basic expenses of Yunfan Technology are the basic necessities of this group of people. The usual profits are not used for other investments at all. The balance in the account is increasing. Liu Yun is not sure how much it is at present, and he has never calculated it. Anyway, There is no shortage of money to spend, even if you know how much money is in the account, it is useless. The money is systematic, and Liu Yun can't embezzle it, and it is easy to be found out.

Besides, the current state is very good, with a little passion in the plain, and the small life is very comfortable. Whoever has nothing to do to test whether the system can make money from the company will be uncomfortable.

Although the company is very rich, Liu Yun has no intention of buying other people's algorithms. It is very simple to buy other people's algorithms. Others know what the algorithm looks like. If it is leaked by the seller, it will be bad for the glasses manager. A fatal blow, this method of purchase is definitely not acceptable.If the algorithm could be purchased, Liu Yun would have bought it a long time ago, why bother to spend points to buy it in the system mall.

You must know that points are very difficult to obtain, so don't use them if you can.

But the things in the system mall are safe, Liu Yun is more at ease.

The system is a product of Dao. How can anyone in this world get information from Dao?Liu Yun has never even seen the way of heaven, let alone a more advanced way.

Produced by the system, it is naturally a high-quality product.

Liu Yun glanced at Liu Jinwei, whose face was getting more and more rosy, and said: "Just kidding, our company will not buy algorithms. After all, the algorithms we buy are developed and designed by others. If the seller leaks the information to us for many years I will never allow this kind of situation to happen, so I made an algorithm from other places, and the security of the algorithm is enough to support my eye display interface." Liu Yun felt that Liu Jinwei's face was getting better and better Sure enough, the power of love is great. Not only does Liu Jinwei look neat, but his whole person is becoming more cheerful every day, and he is no longer so introverted.

It made Liu Yun want to fall in love a little bit, if possible, who wouldn't want a sweet love.

Of course, Liu Yun is quite picky.

Liu Yun likes that hot type of woman, but also doesn't like that kind of hot type. One is the visual aspect, and the other is the marriage aspect. Liu Yun thinks that the quieter one is more suitable for marriage. , A woman who is too hot is easy to run a horse on her head.

Naturally, no man likes to run a horse above his head.

So some girls are only suitable for dating, and some girls are only suitable for marriage, it is still necessary to distinguish.

Well, thinking a little far, let's think about the problem of glasses display.

Liu Jinwei asked curiously: "Where did you get the algorithm? Is it from the company behind you? If it is from the company behind you, it should be very advanced. Is the algorithm okay?"

He was a little curious about what kind of algorithm Liu Yun got. Although he couldn't understand the algorithm, it didn't stop him from taking a look.

Liu Jinwei thinks that Liu Yun's algorithm should be obtained from the background, because Liu Yun can't program at all, how could the algorithm be purchased through other channels, and Liu Yun said that he didn't spend money to buy it, so it is natural I got it from the backstage of Yunfan Company.

As for the fact that Liu Yun is a genius who quickly learned the algorithm, Liu Jinwei doesn't believe it at all. Liu Yun is not a legendary figure like Wang Chuanjun. How could he learn the algorithm so quickly? Even if he learned the algorithm so quickly, he couldn't design Good algorithm to come.

Therefore, the algorithm in Liu Yun's hands can only be obtained from the company behind Yunfan Company.

Liu Jinwei wants to see the algorithm. He is not only curious about the algorithm, but also curious about what company is behind Yunfan Technology Company. After all, he has been in Yunfan Technology Company for so long, and he has never heard any rumors about the power behind Yunfan Company. But, this is really weird.

Moreover, Liu Yun is with him almost every day. He has never seen Liu Yun call any mysterious person or secretly go on the phone. Every time Liu Yun contacts others, he is aboveboard and never sneaky. .

Therefore, Liu Jinwei didn't find any trace of the company behind it at all, which is really strange, as if Yunfan Technology Company has no backstage.

However, judging from Yunfan Technology's 1 trillion registered capital and various operating mechanisms of Yunfan Technology Company, it is impossible for Liu Yun to create Yunfan Technology Company alone, so Liu Jinwei believes that there must be a background behind Yunfan Technology Company.

It's just that the background was hidden too deep, and Liu Jinwei didn't find even a little trace.

I have to admit that the backstage behind Yunfan Technology Company is not ordinary.

"Look at the yarn. It's a commercial secret. How can anyone show it casually? It's not allowed to see it, even if you hear it." Liu Yun rejected Liu Jinwei's request.

It’s not that I don’t want to show it to Liu Jinwei. The main reason is that Liu Yun doesn’t have an exchange algorithm at all. Liu Yun plans to choose an algorithm according to the actual situation after the glasses display interface is created.

Again, the main reason is that points are too difficult to obtain, so points are particularly precious, and Liu Yun is not willing to squander them, so naturally it is impossible to use them for random exchange algorithms.

It's a pity that at the beginning, he told Liu Jinwei that he already had an algorithm, and wouldn't it be embarrassing if he couldn't come up with the algorithm now, so Liu Yun could only use commercial secrets and not show it to others.

"Let me see what I'm afraid of. Anyway, I'm a software engineer. I'll finish the construction of our Taili City server in the end. I'll see the algorithm sooner or later." Liu Jinwei sent a soul blow to Liu Yun.

What he said seemed reasonable, but Liu Yun couldn't refute it, but he really didn't have an exchange algorithm.

What to do, I can only change the topic.

Liu Yun thought for a while that since the algorithm is settled, it is time to start building the server, so he asked Liu Jinwei, "Let's not talk about the algorithm, what are you going to do with the server?"

"For the server, we can build it ourselves. Look at Penguin and Ali, they all have their own servers. If you want to make the server bigger and stronger, you must hold it in your own hands. If you want to If you simply get through the crisis and it’s over, you can rent a server. How to do it depends on the boss’s plan. Anyway, I am an employee and I will listen to you.” Liu Jinwei wanted to build a server for his own company, but he was afraid that Liu Yun was just to spend time. Difficulties, if it is just to get through the difficulties, there is no need to do it yourself, just hire some people to deal with emergencies.

Besides, he is the only programmer in Yunfan Company now, and he will definitely not be able to build an oracle database in the short term.

If Liu Yun wants to do it seriously, Liu Jinwei will definitely recruit a group of people to build it with C# language and oracle database. The classic representative of this combination is the famous Jingxi shopping website in Han Dynasty. The Jingxi shopping website uses C# language And large database ORACLE.

"Aren't you talking nonsense? I want to get out of the control of the chip. I can't just want to get out of it for a few months and leave it alone. I must completely get out of the grip of the Chipcom chip company. How can I temporarily build it to survive the crisis? It's over." Liu Yun felt that Liu Jinwei's house was a bit ruthless, otherwise he couldn't even see the most basic form clearly.

He, Liu Yun, is the one who wants to fight with Corecom Technology to the end. There is no time to kneel down and beg Corecom to forgive this kind of operation.

So naturally you need to build your own server and control the database yourself.

"Then Liu Yun, please talk about your requirements. You also know that I am the only programmer in our company. If your requirements are too high, I will naturally not be able to complete the goal." Liu Jinwei was a little embarrassed when he remembered the current situation.

"I don't understand this. The requirement is to ensure safety, add as many verifications as possible, and be fast. Anyway, the scope of our initial construction is only here in Taili City. As long as the server can ensure normal use by people in Taili City That’s fine, as for whether to upgrade the server, that’s a matter for the future.” Now that the network is so severely paralyzed, Liu Yun naturally has no extra time to wait to build a particularly large server room.

As long as it can be built quickly, you can sacrifice some data security and use a relatively low-end database.

"How about this, I use C# to build the background of the website, and use sql server for the database to be completed quickly. If I use sql server to simply build the database and use it first, I think the sql server can be built in a day or two. The oracle database saves a lot of time." Liu Jinwei said his proposal, which was based on Liu Yun's request, mainly because the SQL server is very simple to build, and it can be easily built by one person.

"Jin Wei, why do I feel that you are lying to me? The computer book I read yesterday clearly stated that SQL Server is just the simplest database, and it can have tens of millions of data. Are tens of millions of records enough? According to the books, they all use databases like Oracle." Liu Yun doesn't know much about databases, but he read computer books recently, and he has some understanding of SQL Server.

"Why is this lying to you? The main reason is that the SQL server is built quickly. Besides, it is only used by people in our small city. It is enough to build a few more databases. Aren't you going to build a base station? Each base station corresponds to A database is enough. Everyone’s living area is basically in a small area. We set up a base station in an area, and set up a secondary server in the base station to store user information. If there is no user information in the base station, call The server of the nearby base station is enough, and our company’s server can be used as a level 1 server to control the server of the base station.” Liu Jinwei proposed a plan according to Liu Yun’s request.

"Can't it be done in one step? Why do we have to distribute the data in the database of each base station? Isn't it just that we put all the user's data in one server? It's so convenient." Liu Yun doesn't like one base station corresponding to one How the database is allocated.

The population of Taili City is not very mobile, and the method of assigning one base station to one server is indeed very appropriate, but Liu Yun always feels that the method of dividing user data into dozens of servers is a bit unstyled and too low.

"Liu Yun, why do you have so many requirements? If you want to build a server quickly, you have to use SQL Server, and at present it is only for Taili City. It is enough to build a few more secondary servers. If you want to transfer user data After the merger, we will develop and build a larger database. At that time, we will not only replace the database, but also upgrade the hard disk and other equipment.” Liu Jinwei feels that Liu Yun is a bit out of control today.

You can't blame Liu Yun, either. The interlacing is like a mountain, and laymen can only watch the fun forever.

"It's okay, let's do this for now, let's get over this difficulty first, and then spend time upgrading this thing later." Liu Yun felt a little regretful, and it was a bit uncomfortable to think that he couldn't do it in one step.

It's a pity that the current time is tight and Yunfan Technology has no programmer team, so we can only do it first.

After the exchange between Liu Jinwei and Liu Yun, they issued a tablet and began to design the database.

The setting of sql server is very simple. After setting the username and password, you can access the database through the username and password. If you fail to pass the user password verification, you will naturally be unable to access the database.

Then set whether to connect remotely. Liu Jinwei intends to use the internal access method of the database, that is to say, the database can only be accessed through the database, and the database of other base stations cannot be directly accessed.For example, user A's data is stored in base station A. At this time, if user A is in base station B, he must first visit base station B, base station B, and then visit base station A. Finally, base station A's data is transmitted to base station B. Base station B then communicates with the user A interaction.

The tables in the database are very simple, and the tables are nothing more than the four functions of insert, update, delete, and selectrt.

After the database was set up here, Liu Jinwei asked Liu Yun, "Can you explain how to verify the glasses display, so that I can give users the permission to add, delete, check and modify."

"My idea is that the eye display has a signal receiving device. This device can verify the user's information like a SIM. Only through user verification can the data transmitted by the base station be decrypted." Liu Yun attaches great importance to security, or else Will not spend points to buy algorithms.

"Okay, I understand. Since there is an identification or decryption algorithm device in the glasses, the user's id and password are fixed, which means that the user does not have the right to add, delete, or modify his user identity. If he wants to modify the user's identity in the future The information can only come to us to modify, is that what you mean?" Although Liu Jinwei said so, he actually started to operate the database.

If the glasses display is regarded as a social software, it is equivalent to the user logging in through the user name and password, but the user cannot modify or delete the password independently. If you want to complete the modification of the password and user name, you must go through Yunfan Technology here, only Yunfan Technology here Has all permissions of the user.

"Yes, that's what I mean. Liu Jinwei, are you smart? It's impossible to raise your salary, but I can introduce you to a girlfriend." Liu Yun said jokingly for a long time.

"Get out of here, you didn't introduce me when I didn't have a girlfriend, but now that I have a girlfriend, you start to introduce me enthusiastically, are you afraid that I won't kneel on the washboard when I go home?" Liu Jinwei's face Fear of the washboard suddenly emerged, and he touched his knee subconsciously.

After Liu Jinwei finished speaking, he continued to write codes. The sql server is so simple, just make a sample and copy it when the server is built.

Senior Programmer, ctrl c ctrl v.

"I don't want to talk nonsense with you. You should do it quickly. We have to build a server after we finish it. Now we can only consider that the theoretical foundation has been completed, and there is still a lot of work to do." Liu Yun stopped playing around with Liu Jinwei, let Liu Jinwei worked hard on the database.

(End of this chapter)