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

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Solaris Tips : Check current active boot device, when used in volume manager (SDS / SVM / VxVM)

During regular maintenance It is often a requirement  to us to determine which  disk we actually boot from when the root volume is under volume manager control.   Solaris on SPARC   Sparc with SVM  # prtconf -pv|grep bootpath: bootpath: ‘/sbus@3,0/SUNW,fas@3,8800000/sd@1,0:a’ Sparc with VxVM Root Volume...

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Introduction to Hadoop

Hadoop is a platform that is well suited to deal with semi-structured & unstructured data, as well as when a data discovery process is needed. That isn’t to say that Hadoop can’t be used for structured dara that is readily available in a raw format; because...

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Unable to get EMC storage Lun's visible under veritas control in Linux.

  I was performing Storage migrations for Linux RHEL 5.x and 6.x having VXVM. Storage have provided the Lun’s and confirmed all is okay from their end. But I was unable to get them visible on Veritas level though the same were visible at OS level....

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Storage Administration : Netapp Snapmirror

Snap Mirror Basics   1. Snapshot technology is the foundation for SnapMirror 2. SnapMirror is a fast and highly flexible solution for replicating data over LAN, WAN and FC networks. It can also be used for data migration, data distribution for load balancing and remote access. 3. No interruption...

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Virtual Lab : Get Your hands dirty with grep & RegEx

Regular expressions are extremely useful in extracting information from text such as code, log files, spreadsheets, or even documents. As an unix administrator we do regularly use the regex to perform various problem diagnosis , automation or remediation tasks. And it is almost impossible to imagine...

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RHEL 6 – ISCSI Administration Series – ISCSI Lun resize

This is second post from the ISCSI administration series ( you can refer the first post here RHEL 6 – ISCSI Administration Series – Configuring ISCSI Server and Client ) . In this post, I will be showing you an hands-on exercise to expand a ISCSI LUN which is already...

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RHEL 6 – ISCSI Administration Series – Configuring ISCSI Server and Client

  ISCSI Server Configuration on RHEL 6 Overall Steps :  Install the RPM required for ISCSI Target Administration  Enable the ISCSI Target Services  Configure the ISCSI target to share the storage  Attach Luns to the ISCSI Target  Share the ISCSI Target to specific Client Machines  Add...

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SAN Storage Migration – Solaris with VxVM

This is a following post for my previous SAN migration post  Solaris host level SAN migration (with SVM) from Clariion to VMAX.   As discussed earlier in my previous post,  many organisations started migrating their Server storage from Old legacy SAN devices ( e.g. EMC Clariion )...

 
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