IT Infra University

 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...

 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  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...