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
业务目标
InSource Solutions 是该机构的增值经销商合作伙伴,该经销商使用三对 Stratus ftServer 系统基于 Microsoft .NET 框架在三个不同位置的控制器站点实施了瘦客户端服务器系统。配对系统中的每台服务器可以支持三个关键应用,一台服务器运行 ACP ThinServer、Microsoft Terminal Services 和 Wonderware InTouch 软件,另一台运行 Wonderware 的Object Server、I/O Device Integration Server 和 Historian Server 软件。
三个站点与中控室连接,每个站点在自己的通用x86服务器上运行 Galaxy Repository(SCADA系统的 Microsoft SQL Server® 数据库,适用于所有Wonderware 软件)和 Wonderware Information Server。2009年初,两台服务器到了需要更换的5年使用期。像之前的案例一样,SCADA 主管 Ken Osborne 看到了投资新技术的机会。
Osborne 没有采用新服务器,他认为虚拟化软件可以利用原有的技术投资,降低成本,确保现有服务,获得未来收益并改善经营。通过亲身体验Stratus 的可用性解决方案和支持。他相信在虚拟环境中运行关键公共服务应用是安全的,因此他消除了顾虑并作出决定
Osborne 表示:“确保持续供水是一个公共卫生和健康问题,我们不允许出现任何停机事故。经营中我们一直使用 Stratus 系统,从未因服务器故障出现意外停机。部件偶尔需要更换,但服务器和应用从未停止运行。使用 ftServers 替代集群式故障转移服务器让我们节约了大量成本,简化了整体操作。我对这个决定毫无遗憾。”
“确保持续供水是一个公共卫生和健康问题,我们不允许出现任何停机事故。使用ftServers替代集群式故障转移服务器让我们节约了大量成本,简化了整体操作。我对这个决定毫无遗憾。”
Ken Osborne
SCADA主管
Pinellas County Utilities
持续可用性解决方案
三个主控中心是 PCU 能够为该县提供服务的核心,因此每个都安装了 ftServer 系统。中控室的 Wonderware Galaxy Repository Server 和 Information Server 同样发挥着重要作用。但1999年设计的基础设施让三个控制器站点能够在中央资料库离线时继续运行。同样,Information Server 停机会导致整个系统数据暂时无法访问,但现场操作不会受到影响。经研究决定,普通服务器也可以胜任这项工作。
当时采用普通服务器,现在采用 VMware 虚拟化平台。Osborne 明白,单单 Galaxy 应用的重要性不足以证明投资的必要性,但在加入适用于移动 HMI 的 Terminal Server 和 I/O Device Integration Server 应用之后,这一混合解决方案展现出以下优势:
- 集中远程访问整个 SCADA 系统比将访问权限分散到三个控制器站点更加高效
- 通过三台虚拟机运行三个高价值服务,由一个 ftServer 提供保护,提高整个系统的完整性和灵活性,创造经济效益
- 通过部署虚拟化平台,整合其他应用和添加新应用只需创建新的虚拟机,而且应用可以立即投入运行
"对于目前的八服务器基础设施,Osborne 表示:“我相信未来 SCADA 可以完全在虚拟机和三台容错服务器上运行,这在十年前是无法想象的。这证明我们的决定在各方面都是正确的,因此,我们的虚拟化战略如今变得更加明智。”
在另一台x86服务器上运行的 Information Server 最终将配备自己的 ftServer 系统。该县建立了高速无线网络,许多员工都可以访问。由于该应用为整个县提供服务,因此需要在持续可用性平台上运行,但更重要的是,在 SCADA 系统和县域网络之间设置防火墙将更加安全。
“十多年来我们的经营一直依赖Stratus系统,从未因服务器故障出现意外停机。”
Ken Osborne
SCADA主管
Pinellas County Utilities
业务影响
Osborne 指出,如果当初采用服务器集群而不是 ftServer 系统,虚拟化项目成本可能会翻倍,实施时间也要延长数周。他说:“如果对比容错服务器解决方案和构建集群的成本,就会很容易做出投资决策。与购买许多独立的 x86 服务器相比,容错服务器还更加灵活,更容易实施。对我而言,最大的优势是支持。Stratus 的工程师全天候监控和保护我的服务器,与招聘全职技术人员相比,这种方式成本更低,效果更好。服务器始终保持运行,我们不会丢失任何数据,这让我们安心无忧。”