Chapter 148: Production Environment

Seven in the morning. The alarm never rang; Lin Chen woke on his own.

His left foot was so stiff under the blanket it felt like a lump of frozen earth, his toes completely numb. He threw off the covers, braced both hands against the edge of the bed, and slowly shifted his weight onto his right leg. When his foot touched the floor, a dull pain ran along the outside of his sole, like stepping on hard-packed mud mixed with grit. He clenched his back teeth and made no sound. Cold water splashed over his face. As the towel passed over his jaw, he could feel the rough stubble coming in. He slipped the USB drive into the pocket of his jeans and zipped it shut. In his canvas bag were the dependency list he had printed last night, a backup script, and half a crushed packet of soda crackers.

There were already footsteps in the corridor. The training camp schedule was posted by the stairwell: breakfast at seven-thirty, assembly at eight. He skipped the cafeteria and went straight to the third floor of Building B. The server room door was half open. Outside the window, the air-conditioning unit hummed with a low mechanical vibration. He pushed the door open. Engineer Li was already inside, and beside him stood a man in a gray jacket, around forty, thinning hair, a chipped thermos cup in his hand.

The client’s tech staff.

“You’re here?” Engineer Li pointed at the testing machine in the corner. “CentOS 5.8, Python 2.4.3. The environment’s already set up. The raw log files are in /data/raw/, four hundred twenty thousand lines. Run it once. We’ll see the result.”

Lin Chen nodded. He plugged in the USB drive. The USB port was a little loose, so he pressed it in harder until the metal contact made a soft click. He opened a terminal. cd /data/scripts. python log_parser_v1.py. Enter.

The screen dimmed for an instant, then the cursor began to jump. No errors. The progress bar moved forward at a visible pace. He kept his eyes on the top window. Memory usage climbed slowly, then stopped at 16.8 MB. Single-core CPU usage floated around thirty-five percent. No spikes from memory leaks, no stuttering from context switching. In the terminal, the processing logs rolled by line after line—[INFO] Processed 10000 lines...—steady and even.

The man in the gray jacket leaned closer to the screen, his brow slightly furrowed. “In a 2.4 environment, you didn’t use with?”

“I used try-finally to release the file handles manually,” Lin Chen said quietly. “Python 2.4 doesn’t support context managers. If I forced it, it would throw a SyntaxError. I also limited regex backtracking steps to keep long-string matches from hanging. For rare-character encoding issues, I used codecs as a fallback replacement, so neighboring fields won’t get contaminated.”

The man said nothing. He only stared at the logs scrolling past in the terminal. The progress bar reached one hundred percent. Then the terminal printed: Done. Output saved to /data/output/cleaned_log.csv. Total: 421,305 lines. Invalid: 1,204.

Engineer Li opened the CSV and pulled up a few random lines. Timestamp, IP, status code, request path—the fields were aligned, no shifting. Garbled text had been replaced with placeholders and wouldn’t affect downstream parsing. He scrolled to the bottom and checked the end of the file. No truncation. No pileup of blank lines.

“It runs.” The man took a sip from his thermos and tightened the lid. “Clean format. Better than the version that outsourcing team gave us before. The final payment will go through according to the contract.”

Lin Chen let out a breath. The sweat on his back had already dried, clinging coldly to his shirt, the chill crawling down his spine. He pulled out the USB drive, deleted the temporary files, and closed the terminal. He moved slowly, not daring to put weight on his left foot, supporting himself almost entirely with his right leg and the edge of the desk.

Engineer Li walked over and handed him a sheet of A4 paper. “Settlement form. By the training camp’s outsourcing rate: eight hundred base for debugging, plus two hundred for performance optimization. Sign it. Finance will transfer the payment next week.”

One thousand yuan.

Lin Chen took the pen. The tip hovered over the paper for a second. Then he wrote his name, the strokes steady.

“Next week this goes to gray release in production,” Engineer Li added in an even tone. “The data volume will expand to two million. This script of yours needs a concurrency overhaul. Python 2.4 doesn’t get good multithreaded performance because of the GIL. Go back and look at os.fork plus pipe-based communication, or pull the core parsing logic into a C extension. Give me a proposal before Wednesday. Take it if you can. If not, I’ll find someone else.”

“Understood.” Lin Chen folded the settlement slip and tucked it into the inner compartment of his canvas bag.

When he walked out of the server room, there was no one left in front of the bulletin board at the end of the hall. A white sheet had been posted there with the midterm assessment list. Lin Chen walked over. His name was not in the elimination list circled in red pen. It was in the “Passed” column, ranked seventh. The six ahead of him were all from major provincial universities—strong backgrounds, solid fundamentals, always sitting in the front row in class.

He was seventh, right at the edge of the training camp’s recommended internship quota.

There were only five slots.

He stood there for two minutes. The dull pain in the sole of his foot returned, like fine needles pushing into the gaps of bone. Then he turned and went downstairs. The motion-sensor light in the stairwell was still sluggish. Only the green glow of the emergency exit sign lit the shadow he cast across the steps.

Back in the dorm, his phone screen lit up.

A text from Wang Guiying: “The power’s back. Xiaoman is awake and asking when big brother is coming home. There’s only three days of medicine left.”

He replied: “Money arrives next week. Go to the village doctor first and get another half month’s worth on credit. I’ve stabilized things here.”

He set down the phone, pulled open the drawer, and took out the blank notebook. He turned to a fresh page and wrote:

1. Concurrency plan for two million records; 2. GIL avoidance strategy; 3. Follow up on internship quota.

The pen paused. He drew a circle around the third item.

Being on the edge of the quota meant he could be squeezed out at any time. He needed harder proof of output. Rankings were fixed; projects were alive. The training camp rules were crystal clear: thirty percent theory exam, forty percent practical work, thirty percent enterprise-linked projects. The first two were already set. The only place left to overturn the result was the last one.

Three in the afternoon. A notice popped up in the training camp group chat: Notice on Opening the Enterprise-Level Practical Project Pool. The attachment listed twelve real business scenarios, covering log analysis, crawler scheduling, and data cleaning. Each project was marked with a difficulty rating and the partnering company. Lin Chen opened the attachment. His eyes stopped on item seven:

[Difficulty A] Distributed Log Aggregation and Real-Time Alerting System | Partner: Infrastructure Department of a leading cloud provider | Requirements: familiarity with Linux kernel parameter tuning, experience with high-concurrency processing, complete architecture design document required.

The bar was high.

But he knew this was the only path that could bypass the ranking and get him a direct internal referral code. Difficulty-A projects were something no one in the training camp had ever dared take on. If you took one, you either scored full marks or went out immediately.

There was no middle ground.

He closed the document. Under the desk, his left foot tapped lightly against the floor, trying to wake the deadened nerves. The clouds outside had thickened, and the wind stirred the leaves into a rustling hiss. The ozone smell lingering from the server room still seemed stuck in his nose. He created a new folder and named it project_07.

The cursor blinked.

Waiting for input.

He opened the system monitor and pulled up the historical memory and CPU graphs. Four hundred twenty thousand lines, 16.8 MB, thirteen seconds. At two million lines, linear scaling would push memory above eighty megabytes and runtime past a minute. Production wouldn’t allow that. He had to cut it apart at the architectural level. Sharded reads, a multi-process pool, shared-memory queues. Python 2.4 had no ready-made wheels for any of it.

He would have to build them himself.

He typed the first line of comment:

# Target: concurrent parsing on a single machine, peak memory <50MB, latency <300ms per 10,000 lines.

His fingers settled on the keyboard. The rhythm was slow, but steady. Under the blanket, his left foot twitched faintly, and he did not move. The screen’s cold light reflected off his face. In his pupils there were only the rolling characters.

He had to submit the architecture draft tomorrow.

It could not fail.