VMware Virtual Machine(VM) Configuration File types

VMware Virtual Machine(VM) Configuration File types

Introduction– When you create VM (Virtual Machine) in VMWare based Virtualization platform. VMware creates  few VM configuration files in  folder with VM name in Datastore (Local Storage or NFS/SAN). Please find the table which describes files types in vmware…   File Usage File Description File Format .vmx .vmname.vmx Virtual machine configuration file. ASCII .vmxf vmname.vmxf …

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VMware ESXi Commands

VMware ESXi Commands

Introduction– Sometime we need to login to Esxi server to check hardware/networking and performance/stats. Sharing few important ESXi commands.. a)  ESXi NIC List ~ # esxcfg-nics  –list Name    PCI           Driver      Link Speed    Duplex MAC Address       MTU    Description vmnic0  0000:01:00.00 tg3   Up   1000Mbps  Full  XX:10:55:DD:CC:XX 1500   Broadcom BCM5720 Gigabit Ethernet vmnic1  0000:01:00.01 tg3   Up   1000Mbps  Full  …

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Log rotation in VMWare ESXi

Log rotation in VMWare ESXi

Introduction– Last month, while working on ESXi5.1 disconnect issue. we analyzed esxi logs for past 3/4 months. Just sharing information related to ESXi log rotation policy.. /var/log # esxcli system syslog config get Default Rotation Size: 1024 Default Rotations: 8 Log Output: /scratch/log Log To Unique Subdirectory: false Remote Host: <none> /var/log # cd /scratch/log …

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Difference between (Extended) ext2/3 and ext4 File System

Difference between (Extended) ext2/3 and ext4 File System

Difference between (Extended) ext2/3 and ext4 File System * Ext2 -It was introduced in 1993. Developed by Remy Card. -ext2 stands for second extended file system. -This was developed to overcome the limitation of the original ext file system. -ext2 does not have journaling feature. -ext2 is recommended for flash drives, usb drives etc -Maximum …

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Simple LDAP Caching Unix Daemon

Simple LDAP Caching Unix Daemon

Introduction- I wrote this simple LDAP Caching unix daemon 2 yrs back when we faced lot of issue with Integrating Apache with LDAP authentication using Apache ldap auth module. We were able to configure it properly however we faced slowness issue. Basically We wanted to use Nagios (Check_mk Multisite) with LDAP authentication. So we wrote …

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Check_mk Multisite and PNP4nagios

Check_mk Multisite and PNP4nagios

Introduction- Nagios Check_mk Multisite (plugin) allow user to view/manage distributed nagios using single Web based Interface. However by default it doesn’t support pnp4nagios graphs (hosts/services from remote nagios) access using (single) Multisite URL. * To access PNP4nagios graphs of hosts/services from remote nagios using (single) Multisite URL, we need to Add Apache Proxy redirect setting. …

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NetApp and Storage hardware terminology

NetApp and Storage hardware terminology

Introduction- Storage systems that run Data ONTAP are sometimes referred to as filers, storage appliances, or systems. Controller or Storage controller refers to the component of a storage system that runs the Data ONTAP. * FC HBA for Disk or FC HBA refers to the Fibre Channel (HBA) Host Bus Adapter that connects the node …

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Manage/Administer NetApp

Manage/Administer NetApp

Manage/Administer NetApp Introduction- – To manage/administer NetApp you can use CLI (telnet,ssh, serial port,SP,RLM or BMC), FilerView, the DataFabric Manager (DFM) software, or the Manage ONTAP Developer SDK software. – Mount /vol/vol0 (root volume) of netapp storage locally and change configuration – If you are entering a command with an element that includes a space, …

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What is Virtualization and Types of Virtualization

What is Virtualization and Types of Virtualization

What is Virtualization and Type of Virtualization? In general there are different types of virtualization like Memory,CPU, Storage, Hardware and Network virtualization. Howver here we are going to talk about OS virtualization only. 1] What is Hypervisor – Hardware virtualization or platform virtualization refers to the creation of a virtual machine that acts like a …

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