Archive for the ‘Technology’ Category

Adobe Patches for May 2020 The Adobe updates for May are just two patches covering 36 CVEs. Two of these CVEs were reported through the ZDI program. The patch for Adobe Acrobat and Reader covers 24 Critical and Important-rated CVEs that mostly consist of Out-of-Bounds (OOB) Reads and Writes. There are also some buffer overflows, memory corruptions, […]

Friday, May 15th, 2020 at 01:04 | 0 comments
Categories: PatchTuesday

CPU的参数详解: us(user time) 表示CPU执行用户进程的时间,包括ni时间。通常我们只看这项。 sy(system time) 表示CPU在内核运行时间,包括IRQ和softirq时间,系统CPU占用率高,表明系统某部份存在瓶颈,通常值越低越好。 wa(waiting time) CPI在等待I/O操作完成所花费的时间,系统不应该花费大量时间来等待I/O操作,否则说明I/O存在问题。 id(idle time) 系统处于空闲期,等待进程运行。 ni(nice time) 系统调整进程优先级所花费的时间。 hi(hard irq time) 系统处理硬中断所花费的时间。 si(softirq time) 系统处理软件中断所花费的时间。 st(steal time) 被强制等待虚拟CPU的时间,此时hypervisor在为另一个虚拟处理器服务。 Processor/% Processor Time 阀值:处理器的阀值一般设为85%。 含义:表示处理器活动的主要指标。高数值并不一定是坏事,但是如果其他处理器相关的计数器(比如% Privileged Time 或者 Processor Queue Length)线性增加的话,高CPU使用率就值得调查了。 Processor/% Privileged Time 阀值:如果数值持续大于75%就表示存在瓶颈。 含义:表示一个线程在特权模式下所使用的时间比例。当你的程序调用操作系统的方法(比如文件操作,网络I/O或者分配内存),这些操作系统的方法是在特权模式下运行的。 Processor/% Interrupt Time 阀值:取决于处理器 含义:表示处理器接收处理硬件中断所使用的时间比例。这个值间接指出产生中断的硬件设备活动,比如网络变化。这个计数器显著增加的话表示硬件可能存在问题。 System/Processor Queue Length 阀值:平均值持续大于2那么表示CPU存在瓶颈 含义:如果就绪的任务超过处理能力线程就会被放进队列。处理器队列是就绪但是未能被处理器执行的线程的集合,这是因为另外一个线程正在执行状态。持续或者反复发生2个以上的队列则明确的表示存在处理器瓶颈。你也能通过减少并发取得更大的吞吐量。 System/Context Switches/sec 阀值:按照通常的规律,Context […]

Friday, April 10th, 2020 at 00:20 | 0 comments
Categories: Technology, Windows
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Logon Types are logged in the Logon Type field of logon events (event IDs 528 and 540 for successful logons, and 529-537 and 539 for failed logons). Windows supports the following logon types and associated logon type values:Logon Types are logged in the Logon Type field of logon events (event IDs 528 and 540 for […]

Monday, February 10th, 2020 at 00:08 | 0 comments
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Wednesday, December 25th, 2019 at 00:06 | 0 comments
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We will use Group Policy Preferences to set password on local user account Click Start – All programs – Administrative Tools – Group Policy Management. Create or Edit Group Policy Objects. Expand Computer Configuration – Preferences – Control Panel Settings. Right-click Local Users and Groups – New – Local User. Ensure the Action is Update and enter the new password. If this is a […]

Saturday, December 21st, 2019 at 18:04 | 0 comments
Categories: Technology, Windows
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No matter whether you use Windows 7, Windows 10 or Windows 8.1, you may want to login without entering a password, while keeping your existing user account password. You may have a long password, and you are using a PC where only you have access. If this is what you want, then you are in […]

Tuesday, October 22nd, 2019 at 10:21 | 0 comments
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Shared Nothing Live Migration requirements: Migration is possible between the servers running the following OSs: Windows Server 2012 R2 or Windows Server 2016 Virtual machine version has to be 5 or higher Both computers must be located in the same Active Directory domain or in trusted domains A user performing the configuration must have Hyper-V […]

Thursday, October 17th, 2019 at 14:08 | 0 comments
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In this article, we’ll look on licensing features of the Windows Server 2019, 2016 and 2012 R2 operating systems from the point of view of new Microsoft licensing model. Also, we’ll tell about the rules and licensing procedures when using Windows Server as a guest OS in a virtual machines, including the HA clusters with […]

Thursday, October 17th, 2019 at 13:41 | 0 comments
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灾备 灾备即灾难备援,它是指利用科学的技术手段和方法,提前建立系统化的数据应急方式,以应对灾难的发生,包括数据备份和系统备份,业务连续规划、人员架构、通信保障、危机公关,灾难恢复规划、灾难恢复预案、业务恢复预案、紧急事件响应、第三方合作机构和供应链危机管理等等。 灾备等级 根据恢复的目标与需要的成本投入,灾备大体可以分为三个等级,如图-1可以用三个嵌套的同心圆表示,从数据级灾备、应用级灾备到业务级灾备,业务恢复等级逐步提高,而需要的投资费用也相应增长。

Tuesday, October 15th, 2019 at 14:36 | 0 comments
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Server 2016 默认远程桌面连接数是 2 个用户,如果多余两个用户进行远程桌面连接时,系统就会提示超过连接数,可以通过添加远程桌面授权解决: 1、添加远程桌面授权服务 第一步:服务器管理 – 添加角色和功能打开添加角色和功能向导窗口,选择基于角色或给予功能安装: 第二步:添加远程桌面会话主机和远程桌面授权功能:

Tuesday, September 24th, 2019 at 17:33 | 0 comments
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