host brain pain

Chapter 84 The bright red hint...

To be honest, Wanda's words "I believe in you" were a bit beyond Su Xiaomu's expectation;

The sincerity in the tone also surprised him a bit, Su Xiaomu glanced at Wanda, nodded silently, and did not speak.

What he can do is to write the algorithm more carefully, and then let everything go smoothly and the result is satisfactory.

"I'll ask IT to open a VPN (virtual private network) for you, open the remote access to the storage, and you can access it at any time." Wan Dai thought for a while and said.

Su Xiaomu was stunned for a moment, "Huh? Will this not cause data leakage?"

Looking up and seeing the look in Wanda's eyes, she silently said "oh" and didn't beep again.

Wan Dai looked at Su Ho and said with a smile, "If you have nothing to do in the afternoon, why don't you go shopping with us to relax?"

In this way, on the day the plan was confirmed, Su Xiaomu was dragged to 'shopping and relaxing'!
I almost broke my leg!

The whole body is telling Su Ho and Wanda: wronged.JPG.

"It seems that Xiaomu and we are relaxing well, and we will come back when we have a chance in the future."

Seeing Su Xiaomu's appearance, Wan Dai was extremely happy, and the female creditor Su He was even more unceremonious.

In the end, they still didn't forget to extract the last bit of labor from Su Xiaomu, so the three returned to Huabanli in the same car and asked Su Xiaomu to drive.

The dinner was very rich, and Su Xiaomu specially ate an extra bowl of rice to make up for it...

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In the next three or four days, Su Xiaomu carefully completed the algorithm structure design of the entire program.

After all, this involves at least hundreds of thousands or even millions of funds-storage alone costs hundreds of thousands, not to mention the data stored on it.

Su Xiaomu did not forget to use all the resources available to him, including consulting Professor Zhang Ke.

When it comes to algorithms, Zhang Ke still has the right to speak. Although it involves some unfamiliar fields and he cannot give targeted opinions, his rich experience is enough to open Su Xiaomu's horizons.

Although the process can also be described as communication.

After all, classmate Su Xiaomu is a top student, an excellent top student, a top student who is open to cheating, and a top student with systematic knowledge support.

Su Xiaomu did not forget UVA’s ancient OJ, and looked for some relevant, tricky, and weird algorithm test questions from it, trying to explore more deeply...

The little garbage system gave Su Xiaomu the most: knowledge, not achievement.

However, if Su Xiaomu wanted to achieve any results, he had to work hard to create them with both hands.

Perhaps from the very beginning, the small garbage system did not set the factory information in the format of getting something for nothing.

So, until now, I don’t give you anything I ask for.

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On Tuesday, December 12th, there are three days before the opening of the ACM Finals in Shanghai Greater China starting on the 12th.

Su Xiaomu finished debugging the program.

From algorithm design, program writing to simulated stress testing, everything has reached a very good level.

Moreover, at the beginning of program design, Su Xiaomu fully considered the stored data and metadata, underlying architecture model, hardware resource performance and so on.

So, pretty tailored.

Fortunately, the time of college students is not like many people who pay every minute and every second when they touch their lips.

It is nothing more than finding an extra balance between courses and training camps to squeeze out time.

After a brief discussion, Wandai, Su Xiaomu, and the IT director of Wan's Small Finance unanimously decided to set the time window for this data migration at night——

Even if there is no business traffic on this doomed storage.

It took Su Xiaomu several days to develop the program this time, it seems that it is not as efficient as directly copying and pasting manually;

But in fact, the progress of manual copy and paste is much slower than imagined.

The transmission speed is about 50MB per second for data replication in daily work, and a rough calculation will take more than half a month without sleep——

It does not include possible risks, possible server pressure bottlenecks, and possible storage-to-storage loss. ①
At [-]:[-] in the evening, the program was uploaded to the storage dual-control operating system.

Wanda and Su Ho were by the side. Before the official start, Wanda smiled and patted Su Xiaomu on the shoulder, "Relax, the worst is nothing more than that."

Su Xiaomu laughed suddenly, "That's right, it's just split in half."

Then the operation was performed, and both women's breaths became short of breath.

In order to get feedback information faster and more conveniently, Su Xiaomu has added many interactive logic algorithms to the program, and each step will print relevant information on the screen:
[Hardware resources are being calculated...]
……

[OS status snapshot in progress...]
……

[Metadata snapshot image in progress...]
……

[Data snapshot mirroring...]
……

[Total data statistics... 69.7TB]
……

[Transferring... Transfer rate: 3.8GB/s...

Calculating remaining transmission time...]
Seeing this scene, Su Xiaomu silently raised his heart and raised his courage.

The previous steps are all for the purpose of state rollback when an unexpected situation occurs, including snapshots, and snapshot images are for this purpose. ②
There is no pressure, stability, or reliability involved at all.

This last step is now the official start.

On another control system stored in this set, the program returns different results.

What finally gets printed to the screen is:
[Business pressure status is normal...]
Listed are the statistics of processors, memory, fiber optic links, and storage internal links.

Su Xiaomu looked seriously at each new parameter that popped up on the black command line character page.

Within 2 minutes, the IT person in charge of Wanshi Small Finance ran over from another operation room and said excitedly.

"President Su, you can see data traffic coming from EMC, and the traffic of the dual-port 16GB FC has almost reached its peak. Now the business pressure is normal, and there is no abnormality."③
Before he knew it, Su Xiaomu also began to be called Mr. Su.

Su Xiaomu just nodded, his eyes never leaving the display screen.

After the data was continuously transmitted for 5 minutes, the transmission efficiency from the domestic storage to the EMC storage was still stable, and the overall business pressure was normal without abnormalities.

Su Xiaomu breathed a sigh of relief quietly, and was about to say something.

"Drip, drip, drip~"

A piercing long beep suddenly came from the speaker, and a bright red prompt popped up on the black background board:
ERROR!

……

①: I have personally presided over the data transfer work several times, just a word of MMP, there are too many unexpected factors, the theory can reach 1GB/S and the actual 10MB/S to understand, no one knows what the hell, for the sake of data consistency Wait, you can't just stop when you start the migration.

②: Snapshot: Copy the image at a certain point in time. Simply put, it is to take a picture of the running state of the software at a certain point in time. When an accident occurs, the state of the software will be rolled back to this point in time.Mirror: Make a copy of an identical copy.

③: 16GB FC optical fiber port, dedicated to SAN network, the rate is about 16Gbps=2GB/S, double port is double equal to 4GB/S.

PS: please be gentle in the relevant industries. I know that the block copy between asynchronous storage is a problem in the industry, and there is no good solution. Even EMC’s mirror view and SAN copy software are basically only used for foreign storage, and there is no guarantee Perfect, so, a light spray.

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Broken bowl.

Ask for a recommendation ticket, ask for a refill, and ask for a book list.

(End of this chapter)