Running idle scripts on a VPS has become a common requirement in scenarios such as automated operations and maintenance, traffic-boosting services, cloud backup, scheduled monitoring, and game-assistance scripts. Choosing a stable, low-latency, and reasonably priced VPS often determines the long-term reliability of these tasks. With the gradual opening up of the overseas server market, Japan's CN2 VPS has become a popular choice for many users running idle scripts due to its high-quality network, short-range low latency, and relatively ample bandwidth.

　　But questions arise: Is Japan's CN2 VPS truly suitable for long-term script execution? Is the bandwidth sufficient? Will instability cause script interruptions?

　　1. What is an idle script? Core VPS requirements

　　Idle scripts, in simple terms, are small programs that run continuously and periodically. These scripts typically have the following common requirements:

　　Stability: The script must run uninterrupted for a long time, and the VPS must not be frequently restarted or disconnected.

　　Network quality requirements: Fast access to the target server/interface, with low ping latency.

　　Bandwidth: If it includes upload/download functions, such as crawlers and aria2, a certain transmission bandwidth is required.

　　Low cost: Idle tasks are mostly auxiliary and cost-sensitive.

　　Resource isolation: Dedicated IP, controllable CPU, and stable memory to avoid resource contention among shared users that may affect operation.

　　II. Japan CN2 VPS: Advantages Analysis

　　Compared to traditional Hong Kong and US VPSs, Japan CN2 VPSs offer the following key advantages, making them ideal for running idle scripts.

　　1. Close proximity to China, resulting in low latency. The average ping from Japan to mainland China is around 30ms. After optimizing the CN2 backhaul, this is consistently maintained within the 25-50ms range, significantly outperforming European and American nodes, effectively reducing API access lag and command response delays.

　　2. Access to China Telecom's CN2 GIA line offers low packet loss. CN2 GIA is China Telecom's high-quality international outbound line, offering higher bandwidth guarantees and priority compared to traditional BGP or standard CN2 GT. This ensures more stable and reliable access to domestic APIs and third-party interfaces for idle tasks.

　　3. Reasonable pricing, suitable for long-term deployments. Japan VPS prices have stabilized in recent years. Compared to the often high prices of Hong Kong VPSs, Japan VPSs offer good configurations at a moderate price, making them particularly suitable for long-duration, low-resource workloads like idle scripts.

　　4. High stability, with minimal disconnection rates. High-quality service providers offer CN2 VPS in Tokyo or Osaka, Japan, with multiple network nodes, mature data center facilities, an online rate of over 99.9%, and a low restart probability, making it very suitable for unattended idle script deployment.

　　Ⅲ. Bandwidth Performance Testing: Can Upload/Download Scripts Be Run?

　　Many idle tasks involve more than just running logic scripts; they also involve data interaction, downloading and uploading, and other operations. Examples include batch uploading Baidu Netdisk resources, setting up aria2 for batch offline downloads, and automatically receiving uploaded files in a Telegram bot. Therefore, actual bandwidth and transmission performance are crucial. We conducted the following tests using a CN2 Japan VPS (configured with a single core, 1GB RAM, and a 20GB SSD, using a CN2 GIA connection):

　　Note: Japan CN2 VPSs offer ample bandwidth and excellent data transmission performance for domestic targets, making them suitable for idle tasks requiring high transmission capacity.

　　IV. Key Recommendations for Choosing a Japan CN2 VPS for Automated Scripts

　　1. Must choose a "CN2 GIA" route, not a standard CN2. There are many "pseudo-CN2" routes on the market, or routes that are only optimized for telecom services but still use international BGP for backhaul, which can lead to packet loss over time.

　　Criteria: A GIA route is identified by the presence of the "giao.cnc.cn" node in the MTR backhaul.

　　2. Recommended VPS Configurations

　　Lightweight Sign-in/TG Robot: 1-core CPU / 1GB RAM / 20GB SSD

　　Download and Upload Scripts: 2-core CPU / 2GB RAM / 40GB SSD

　　Headless Browser: 2 or more cores / ≥3GB RAM

　　3. Avoid bandwidth-restricted VPSs. Some providers impose a "peak bandwidth limit + over-limit speeds up to 512kbps." We recommend prioritizing plans that offer "equal shared bandwidth" or "dedicated bandwidth."

　　4. Choose a plan that supports static IPv4. Some idle tasks require a stable IP address. Avoid dynamic IPs or NAT VPSs, and opt for dedicated IPv4 addresses whenever possible.

　　Combining bandwidth performance, stability testing, and latency evaluation results clearly demonstrates that Japan CN2 VPSs are ideal for running idle scripts. Whether lightweight tasks or scripts involving file transfers, they can run efficiently with appropriate configuration and a reliable connection. Also, consider choosing a stable connection (GIA preferred), clarifying bandwidth limits and node allocation rules, and regularly reviewing logs to prevent script anomalies from affecting the service provider's rating. For users seeking low latency and high stability, Japan CN2 VPSs offer an ideal idle platform in terms of cost-effectiveness, security, and connectivity.