Unix, Linux, DevOps , Cloud computing and BigData Knowledge-Base

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RHEL 7 : How to hot plug memory on VMWARE/Virtual RHEL7 Guests

Check current memory status of all modules: [root@gurkulrhel7 ~]# more /sys/devices/system/memory/memory*/state :::::::::::::: /sys/devices/system/memory/memory0/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory1/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory2/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory3/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory4/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory5/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory6/state :::::::::::::: online :::::::::::::: /sys/devices/system/memory/memory7/state :::::::::::::: online [root@gurkulrhel7 ~]# If...

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VXVM : Resolving duplicate disk/device entries in "vxdisk list" or vxdisksetup

Sometimes, when failed fibre channel disks are replaced in arrays or servers under Veritas Volume Manager control, duplicate entries appear in the vxdisk list output. While Veritas indicates in TechNote 236062 that the ultimate solution is a reconfiguration reboot (or two), recycling the host is often...

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