Be Careful, DELL EMC Unity XT Will Reboot After 275 Days
I’ve read a strange news today about Dell EMC Unity XT. Seems there is a bug on some older OE and storage processors will be rebooted after 275-300 days.
Davoud Teimouri - Virtualization and Data Center Blog
New Release – STOR2RRD & LPAR2RRD (7.50)
I’ve published many articles about STOR2RRD and LPAR2RRD monitoring software for monitoring servers, OS, storage, SAN, LAN and other devices. XORUX has released new version of the monitoring suites with new features and capabilities. Let’s review the new features, capabilities and changes.
Network Latency: Best Tools for Measuring
Enterprise businesses such as banking business using latency sensitive applications. Most of application delay issues are related to network infrastructure. Also most of application server are Linux servers. How can we measure network latency on Linux?
Fibre Channel Trunking (Aggregation): Better Performance, Higher Bandwidth (>1 Tb/s)
We are all knowing LACP on ethernet network but Fibre Channel and SAN network providing multipathing I/O by using logical and physical paths as single device on operating system and also using path selecting policies for using I/O paths optimized. But if server using 16Gb/s FC HBA, so there is no bandwidth aggregation. Server can generate bandwidth for each port up to maximum speed of port and also path selecting has performance impact of server when large paths are presented to server. Months before, I was thinking about FC port aggregation and did many searches but I didn’t find anything until now.
MicroVM and Firecracker: Discover Advantages and Disadvantages
During virtualization revolution, physical servers replaced with virtual machines to run multiple different workloads on a single server hardware but virtual machines were still large and needs some resources to run as isolated servers. Virtual machines needs to have their own operating system and applications. Also they needs to manage and configure separately. MicroVM or Micro Virtual Machine offering benefits of two different technologies and Firecracker will help you to implementing MicroVM.
Oracle Linux Manager 2.x, Free Linux Management
I am really fan of what is doing Oracle for Oracle Linux and offering open-source solutions with free update. Oracle Linux Manager is one of free and open-source solutions that Oracle provides for Oracle Linux by developing new enterprise solution from open-source solutions.
HPE BladeSystem Retirement
I met HPE C7000 more than ten years ago for first time and I was newbie engineer in virtualization and datacenter. We had 6th generation of blade servers and the first virtual desktop infrastructure farm hosted by the servers in Iran and even Middle East. Now I didn’t find any official information about HPE Blade System retirement but after BL6xx server are retired and BL4xx servers released by some limitation compare to Synergy servers, it was clear.
Run Remote Command on Multiple Clients: Best, Easy and Secure Solution
Windows is still most popular operating system for clients and many administrators using Windows as client to managing infrastructure. But the administration needs to interacting with some Linux servers or other systems that using OpenSSH server as connection gateway for accessing to shell.
HPE OneView 5.50 Warning: Overall security state of the system is at risk
You may using HPE OneView for monitoring your HPE infrastructure, if see this warning on your server health, follow this post:
Overall security state of the system is at risk
HPE OneView Global Dashboard: Best Software for Global Monitoring
HPE is on of biggest companies which producing data center equipment’s and facilities. HPE has unified management and monitoring suite for server hardware, network devices and storage devices that called HPE OneView. You may have multiple data center at different geographical location and needs to monitoring all devices on same dashboard. Because HPE OneView needs access to any under managed devices via network and it’s recommended that implementing HPE OneView in local site, there are some limitations about managing and monitoring all devices on single instance of HPE OneView. HPE has introduced HPE OneView Global Dashboard for monitoring and managing multiple HPE OneView appliances.
Keycloak, Open Source Identity and Access Management
I’m not a developer or software designer but as an user, I need to Single Sign-On for web applications that those made for a software solution. Some companies developing their solutions on this regard but Keycloak already developed and available as open-source software.
I/O Block Size (> 3 MB) Best Practice on EMC AFA/HFA and Linux (Physical and Virtual)
We have a problem on our Oracle Database servers which are hosting by Oracle Linux servers, when Oracle Databases putting to Maximum Availability protection mode, some workloads impacts performance whole database ecosystem. The workloads are related to some tasks which performed from by application servers and the tasks needs huge read/write I/O on storage arrays. We are using DELL EMC Unity/Unity XT (All Flash/Hybrid Flash) family in most of projects. I did lots of searches and found nothing at first step. I had only one clue, I/O block size was very large during performing tasks by database servers.
Windows Updates Remotely: Download and Install via PSWindowsUpdate PowerShell Module
Operating system is the core of any system and we have to keep operating system update cause of preventing performance issues, unplanned downtime and fix security vulnerabilities. Windows (client and servers) has a standard terminology for receiving updates monthly and most of organizations using Windows Server Update Services to applying updates of multiple servers/client. Updates would be downloaded and installed on multiple servers/clients automatically but service downtime is always the biggest concern but another concern is installing updates on multiple machines and rebooting systems during planned downtime. PowerShell and WinRM would help us when they come as PSWindowsUpdate PowerShell module!
CPU Core Limit in Oracle Database: Best Solution for Dummies
When you have no right sizing, when you have no control what be happened on database and when you didn’t any optimization, limiting using resources by database or any other system will necessary to help server to keep working without hang. Oracle Database be able to use all processing resources on a server and other process will be dead or hang if they couldn’t receive enough time for processing. CPU is the most important component and resource on any computer system, so if you want to stable system then the needed resources should be measured by right sizing or limiting some processes to delivering minimal resources to other processes.
Major Update For DELL EMC Unity/Unity XT OE (5.2.0.0.5.173)
EMC has released new OE (5.2.0.0.5.173) for Unity/Unity XT storage array family with new major changes. The new release also contains lots of resolved issues for different components. The biggest changes are “Data Reduction and Advanced Deduplication” can now be enabled for hybrid storage pools and also dynamic pools will be expanded faster than before.
