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Veritas Cluster Server (VCS) Commands - Cheat Sheet

 LLT and GRAB VCS uses two components, LLT and GAB to share data over the private networks among systems. These components provide the performance and reliability required by VCS. LLT LLT (Low Latency Transport) provides fast, kernel-to-kernel comms and monitors network connections. The system admin configures the LLT by creating a configuration file (llttab) that describes the systems in the cluster and private network links among them. The LLT runs in layer 2 of the network stack GAB GAB (Group membership and Atomic Broadcast) provides the global message order required to maintain a synchronised state among the systems, and monitors disk comms such as that required by the VCS heartbeat utility. The system admin configures GAB driver by creating a configuration file ( gabtab). LLT and GAB files /etc/llthosts --> The file is a database, containing one entry per system, that links the LLT system ID with the hosts name. The file is identical on each server in the cluster. /etc...

Solaris 11.4 Network Administration Cheatsheet

 Here we discuss the Commonly used Network Commands for Solaris network Administration. How to list the Physical Network card's information : # dladm show-phys LINK            MEDIA         STATE      SPEED  DUPLEX    DEVICE net0            Ethernet      down       0      unknown   i40e0 net1            Ethernet      down       0      unknown   i40e1 net2            Ethernet      down       0      unknown   i40e2 net3            Ethernet      down       0      unknown   i40e3 net4            Ethernet    ...

Solaris 11.x Patching Procedure on Guest Domain( LDOM) with Zones

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Solaris 11.x Patching  we are working on upgrading the Solaris 11 operating systems to the latest version.  we have  Oracle Corporation  sun4v SPARC T8-1 servers used for OVM(LDOM) on top of Physical servers we have installed LDOM Manager, and we are running Guest domains on top of the Control domain. on Guest domains, we are also running multiple zones on a single Guest LDOM. On Zone, we are running Oracle DB. Here is the step we followed for the patching Control Domain along with Guest LDOMs. we have scheduled the CHG with planned Dates and obtained the required CAB Approvals. on the Scheduled date, we will suppress the alerts and inform to SOC/GCC team to ignore the alerts.  we are following the Live upgrade procedure for patching the servers. Architecture:  Here is our physical server design and architecture. Solaris Zones Solaris LDOM(Guest Domains / OVM) Solaris Control Domain ( Physical Server) Steps Involved / Followed: we will inform to DB tea...

Good Tips to Make Blog Layout Effective for ads

While you are creating a blog, whether it’s a page on a business site or your site is a blog—is a great way to interact with readers and drive traffic to your site. But because so many sites do have blogs, it’s important that yours stand out. Excellent content is, obviously, important. Readers won’t keep coming back to a blog that’s poorly written or seldom updated. But even the best blog posts will get more attention if the layout surrounding them is visually appealing, memorable and easy to navigate. Here are six tips to make that happen. First thing to Make posts inviting. If you have a blog with a lot of posts, it’s OK to put some of the copy under a cut. But make sure that what readers can see is enough to make them want to click through. Adding a subhead to the title can help clarify exactly what the post is about. Not too Complicated Layout: A great blog layout should never get in the way of the actual blog posts. Avoid layering too many elements into the page. If you are lookin...

Oracle Linux Virtualization Manager 8.7 Installation on Physical Server

we have recently Deployed the  Oracle Linux Virtualization Manager 8.7 version on HP ProLiant Server, I would like to make a process what we have followed to bring up the Physical Oracle Linux Virtualization server. This  similar to ESXI in VMware server, on ESXI we will install the ESXi with ISO/Network Installation Methods. We have downloaded the Oracle Linux Virtual Manager 8.7 OS ISO from Oracle Site. Copied to the remote terminal server. Datacenter Team has racked the servers and  provided the ILO IP's and User Names to Proceed with Infra Activities. We have tried to Login to Consoles of the servers , we had a firewall issue to access to consoles over the https. we worked with Network team to Open the ports  at firewall level, then we were able to login & Access the Consoles. Step 1 - we have done with Changing the Default ILO Credentials to standard Credentials as per the Company standards. Step 2 - Next step we have Downloaded the HP Provid...

Oracle Logical Domains (LDOM) Back up & Restoration from Backup Files

Saving Domain Configurations for Future Rebuilding The basic process is to save the resource constraints information for each domain into an XML file, which can then be re-issued to the Logical Domains Manager, for example, after a hardware failure to rebuild a desired configuration. Restore a Domain Configuration From an XML File ( ldm add-domain )  works for guest domains, but not for the control ( primary ) domain. You can save the  primary  domain's constraints to an XML file, but you cannot feed the file back into the  ldm add-domain -i  command. However, you can use the  ldm init-system  command and the resource constraints from the XML file to reconfigure your  primary  domain. You can also use the  ldm init-system  command to reconfigure other domains that are described in the XML file, but those domains are left inactive when the configuration is complete. The method that follows does not preserve actual bindings, only the ...