Author: tmahanta

Storage Policies on vSAN

Throughout the life cycle of the Virtual Machine, profile-driven storage allows the administrator to check whether its underlying storage is still compatible. The reason why this is useful is that if the VM is migrated to a different datastore for whatever reason, the administrator can ensure that it has moved to a datastore that continues to meet its requirements. However, this not how it works in the case of VM storage policies.With vSAN, the storage quality of service no longer resides with the datastore; instead, it resides with the VM and is enforced by the VM storage policy associated with the VM and the VM disks (VMDKs). Once the policy is pushed down to the storage layer, in this case, vSAN, the underlying storage is then responsible for creating storage for the VM that meets the requirements placed in the policy. This makes the life bit easy for the administrators. Storage Policy-Based Management: Deploying a VSAN datastore is different from the traditional way of mounting LUN from a storage unit or NAS /NFS devices. In case of VSAN for better performance and availability of the VMs VSAN uses VM storage policy and a storage policy can be attached to individual VMs during deployment of the Virtual Machine. You can select the capabilities when a VM storage policy is created. Similarly, if an administrator wants a VM to tolerate two failures...

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Rubrik Cloud Data Management platform

Rubrik is the world’s first Cloud Data Management platform that delivers data protection, search, analytics, and copy data management to hybrid cloud enterprises. Why Rubrik ??? 1: Rubrik will allow us to provide an effective backup solution for cloud clients.You find the idea of being able to dynamically set SLA’s to your VM’s across both private and public clouds. 2: Can spend less time focusing on building backup infrastructure and more time designing and maintaining solutions 3: The ease of deployment and amazing user interface for customers is a key differentiator in the market. 4: Zero time restores, granular recovery to the file level, and Google-like predictive search!!!! Whaooooo.      The best part of Rubrik is that you reduce your RPO. The recovery of a Microsoft Exchange database took only minutes with Rubrik. Before it would have taken 12 hours to restore and then we would have had to mount the database with power tools that we purchased ourselves. The Google-like Rubrik file restores have been a life saver many times 5: Native Immutability to Fight Ransomware: Recover from ransomware with no data loss with immutable backups built into the platform. Resume business within minutes of an attack. Instantly search and recover files to any point-in-time, on-premises or in the cloud. No ransom, no downtime. How do Rubrik make backups interesting and simple? Add vCenter : 1. Log...

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Ruby vSphere Console (RVC): Part 1

The Ruby vSphere Console (RVC) is an interactive command-line console user interface for VMware vSphere and Virtual Center. The Ruby vSphere Console is based on the popular RbVmomi Ruby interface to the vSphere API. The Ruby vSphere Console comes bundled with the vCenter Server Appliance (VCSA) and the Windows version of vCenter Server. It is free of charge and is fully supported. We recommend deploying a vCenter Server Appliance (minimum version 5.5u1b) to act as a dedicated server for the Ruby vSphere Console and Virtual SAN Observer. This will remove any potential performance or security issues from the primary production vCenter Server. After deploying the vCenter Server Appliance, no additional configuration is required to begin using the Ruby vSphere Console to manage your vSphere infrastructure. To begin using the Ruby vSphere Console, simply ssh to the dedicated vCenter Server Appliance and log in as a privileged user. Advantages : ++ More detailed Virtual SAN insights vSphere Web Client ++ Cluster view of VSAN while esxcli can only offer host perspective ++ Mass operations via wildcards ++ Works against ESX host directly, even if VC is down How do you set up ?? To begin using the Ruby vSphere Console to manage your vSphere infrastructure, simply deploy the vCenter Server Appliance and configure network connectivity for the appliance. SSH to the dedicated vCenter Server Appliance and log in as a...

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UCS LSI Adapter Beeps Continuously for the UCS C-Series Rack servers

A Cisco UCS server beeps continuously; this beep originates from the LSI RAID adapter. You can view the LSI MegaRAID Card Beep Codes in order to identify the specific alarm. If there are no failed drives reported by the Cisco Integrated Management Controller (CIMC), this problem might occur due to an issue described in this LSI MegaRaid firmware bug: LSIP200139764. Note: TheLSI defect is reported as fixed in MegaRaid firmware 21.0.1-0111 and 21.0.1-0110. This issue affects any server vendor that uses these adapters (for example, Cisco, HP, and Dell). You can silence the alarm in the LSI MegaRAID BIOS Config Utility. However, be aware that this process requires a server reboot in order to access the WebBIOS. The alarm control is located in Controller Properties. Also ,if you want to avoid an LSI firmware upgrade, you can complete these steps in order to resolve this issue: Install MegaCLI. Refer to the LSI Documents & Downloadspage in order to locate documentation on this procedure. Run this command in MegaCLI in order to silence the alarm: # MegaCli -AdpSetProp -AlarmSilence -aALL LSI MegaRAID Card Beep Codes: These beep codes indicate activity and changes from the optimal state of your RAID array. For full documentation on the LSI MegaRAID cards and the LSI utilities, refer to the LSI documentation for your card. I hope this...

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Troubleshoot Memory issues in Cisco UCS Box

Type of errors that we find in Memory : DIMM Error ECC(Error Correcting Code) Error Multibit = Uncorrectable POST it is mapped out by BIOS, OS does not see DIMM Runtime usually causes OS reboot Singlebit = Correctable OS continues to see memory, performance could degrade Parity Error SPD (Serial Presence Detect) Error Configuration Error Unpaired DIMMs Mismatch errors Not supported DIMMs Not supported DIMM population Identity unestablishable error Check and update the catalog We need to understand what is a Correctable and Uncorrectable error in order to troubleshoot on any Memory related issues on UCS box. Whether a particular error is correctable or uncorrectable depends on the strength of the ECC code employed within the memory system. Dedicated hardware is able to fix correctable errors when they occur with no impact on program execution. The DIMMs with correctable error are not disabled and are available for the OS to use. The Total Memory and Effective Memory be the same (taking memory mirroring into account). These correctable errors reported in UCSM operability state as Degraded while overall operability Operable with correctable errors. Uncorrectable errors generally cannot be fixed, and may make it impossible for the application or operating system to continue execution. The DIMMs with uncorrectable error is disabled and OS does not see that memory. UCSM operState change to “”Inoperable”” in this case. To Check Errors from CLI These commands are useful when troubleshooting errors from...

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