Recent Posts

July, 2012

  • 4 July

    Preventing zone core files on Global zone -Solaris

    Coredump is memory dump of program or application and its generates when application  crashes or terminated abnormally.This coredump is very useful to find root cause of application crashes.But sometimes it will create a problem by filling the root filesystem if /var/core is part of root filesystem and again all the local zones core files will be dump in global zone’s /var/core.Since we have same core …

    Read More »
  • 3 July

    Solaris 10- OS patching using Live-upgrade

    Solaris OS patching has been moved far away from the traditional methods from Solaris 10 on-wards.We no need to bring down the server to single user mode  if you are using live upgrade method during pathing and before choosing live upgrade ,make sure you are using ZFS as a root filesystem.For you information,from Solaris 11 onward,ZFS will be the default root filesystem. In other-words, if the system’s root filesystem …

    Read More »
  • 3 July

    DF command shows incorrect usage in VXFS

    I have observed “df -h”command will show that veritas filesystems is used so and so space, but actually if you go to that mount point and calculate disk space using “du -sh” there will be nothing. In few cases, when df command will not show the correct usage of the filesystems. Also,if the filesystem created is with big size like …

    Read More »
  • 3 July

    How to plumb new IP in the zone on fly

    As we all know that plumbing a new interface and assigning a IP address in Solaris 10 global zone. Have you ever added the new IP address in local zone without rebooting it ? Will it work by adding the IP information in zone’s configuration using zonecfg ? No. If you add a any new configuration in zonecfg, it requires a reboot. But oracle offers …

    Read More »
  • 3 July

    UFS to ZFS conversion-Using Live upgrade

    Its time up to move form UFS to ZFS. From Solaris 10 on-wards ZFS filesystem supports root FS. If you are already having the root filesystem in UFS, you can easily convert it using Liveupgrade with minimal downtime.The actual down time is just a single reboot.Oracle is making ZFS is default filesystem from Solaris 11 onwards and there are many reason behind that. ZFS …

    Read More »
  • 3 July

    Solaris ZONE + Liveupgrade compatibility model –Solaris 10

    Using ZFS as root filesystems on global zone and local zone is huge advantage for OS patching. ZFS is very flexible with Liveupgrade, so that rollback action is very simple. It’s Just reboot. Here we will see what type of zone+zfs configuration will support in Solaris 10 for Liveupgrade. If you are planning to use zones in production, better keep …

    Read More »
  • 2 July

    Oracle server-Virtualization Technologies

    OS Virtualization is a hot topic in the IT market.All the operating system developers and OEM are keep on introducing new virtualization technologies day by day. Have you ever asked why is it so import in infrastructure management ? Operating system virtualization  very important to reduce the hardware cost and isolates the applications from server. In older days ,if you want to port the website,you need to buy a minimum two …

    Read More »
  • 2 July

    Solaris 10’s Resource Management:Controlling process using projects

    in older days we use to set the kernel tuneable parameters through /etc/system in Solaris Boxes.But from Solaris 10 on-wards,we set those parameters using resource control mechanism.The rctladm command allows you to make runtime interrogations of and modifications to the resource controls facility, with global scope. The prctl command allows you to make runtime interrogations of and modifications to the resource controls facility, with local scope. Many kernel parameters …

    Read More »