面向初學者的伺服器可用率與 SLA
如果使用租借服务器,上下班时间极为重要. 它还是衡量服务总体质量的一个指标。 在此篇文章中,我解释什么是上升时间,为什么它很重要,以及它与苏丹解放军的关系。
服务器运行时间是一个显示服务器在特定期间正常运行时间百分比的度量. 它通常以百分比表示,是衡量服务器可靠性的重要标准. 99%的营业时间乍看起来可能很高,但仍意味着每年有几天的停工时间。
什么是服务器 Uptime ?
Server uptime is a metric that shows how long that server is operating normally during a given period. This value is usually expressed as a percentage and serves as an important standard for measuring server reliability.
服务器运行时间是一个显示服务器在特定期间正常运行时间百分比的度量. 它通常以百分比表示,是衡量服务器可靠性的重要标准. 99%的营业时间乍看起来可能很高,但仍意味着每年有几天的停工时间。
恢复时间如何计算和实际停工
上升时间使用以下公式计算。
Uptime (%) = (Annual Operating Time / Total Annual Time) × 100
每年的总时间为365.25天x24小时=8766小时,计入跳跃年数.
每一上升时间百分比的年度停工时间如下。
| Uptime | Annual downtime |
|---|---|
| 99% | About 87.7 hours (about 3.65 days) |
| 99.9% | About 8.77 hours (about 52.6 minutes) |
| 99.95% | About 4.38 hours (about 26.3 minutes) |
| 99.99% | About 52.6 minutes |
| 99.999% | About 5.3 minutes |
上升时段与苏丹解放军之间的重要关系
A Service Level Agreement (SLA) is an agreement between a service provider and a customer that defines agreed service-quality conditions.
SLA不仅包括超时保证,还包括发生故障时的反应时间、数据恢复程序等等。
SLA中的具体赔偿类型
重要的是,《SLA》应明确说明,如果病期低于保证水平,应提供何种补偿。
常见的补偿形式包括降低服务费和赔偿损失。 具体细节因提供商而异,所以在签订合同前总是要核对.
高升时段和级别分类的典型目标
数据中心的可靠性通过Tier分类表示,这些分类与正常时间有关。
- Tier 1: Uptime 99.671%, allowable downtime 28.8 hours per year
- Tier 2: Uptime 99.749%, allowable downtime 22 hours per year
- Tier 3: Uptime 99.982%, allowable downtime 1.6 hours per year
- Tier 4: Uptime 99.995%, allowable downtime 26.3 minutes per year
一般来说,对于商业用途,推荐使用三级或更高一级数据中心的租赁服务器.
低更新服务器的风险:业务影响和估计损失
Lower uptime causes website access failures and service interruptions, which can have a serious impact on business. In the case of an e-commerce site, for example, one hour of downtime can potentially cause millions of yen in lost sales.
(Example) For an e-commerce site with annual sales of 100 million yen, what is the estimated annual loss caused by 99% uptime?
100 million yen ÷ 365 days × 3.65 days ≒ about 1 million yen
这样一来,就更容易理解 休息时间到底有多重要。
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服务器供应商要改进更新时间做什么
租赁服务器供应商通过实施多项措施,包括冗余电力供应、网络连接、服务器设备、定期维修和24小时监测,保持高调。
倒置时间以外的检查站
在选择服务器时,不仅要考虑运行时间,还要考虑以下各点.
- Performance: CPU, memory, and storage performance
- Security: firewalls and malware countermeasures
- Support system: the hours and quality of phone, email, and chat support
- Scalability: how the server handles increases in traffic
- Cost: initial fees, monthly fees, and additional charges
Choosing a rental server that delivers stable service with high uptime is essential to the success of an online business. Review the SLA details, the Tier classification, and the other important factors as a whole, and choose the server that fits you best.