Saturday Mar 10, 2012

Shark Attack on InfiniBand

Grab your magnifying glass and join us in viewing InfiniBand packets closer than ever before. Use Wireshark and Mellanox' ibdump tool to capture InfiniBand packets for offline analysis.

[Read More]

Friday Mar 09, 2012

Advance Routing for Multi-Homed Hosts

Scenario based discussion on enabling access to a host across multiple routers and network. Use of Linux Advance Routing through iproute2 tool set. Comparison on when to use static vs. multiple default routes.

[Read More]

Friday Mar 02, 2012

EECS 2.0 Upgrade Kit Available on My Oracle Support

EECS upgrade kit is now downloadable from My Oracle Support, intended for existing Exalogic X2-2 customers who are interested in upgrading their environments from v1.0.0.x.x to EECS 2.0. 

To find the upgrade kit, please search for the following on My Oracle Support.

“Patch 13795376: EECS 2.0 PHYSICAL INFRASTRUCTURE UPGRADE KIT (V1.0.0.X.X -> EECS 2.0.0.0.0)”

Or use the the "Patches&Updates" section from MOS (images courtesy of Ali Shehadeh)...

[Read More]

Thursday Mar 01, 2012

Exalogic Networking Part 2

Following on from my introduction Exalogic Blog Entry (Exalogic Networking Part 1) this entry describes the Oracle A-Team Exalogic Scripts to help facilitate a simpler ECU installation and provide an example on configuring a standard Oracle ACS type environment. The scripts and a pdf document can be downloaded using the link below :

This blog will summarise the functionality that is provided by the A-Team Exalogic Scripts. These expand upon the existing “Exalogic Configuration Utility” functionality simplifying repetitive jobs, for example creating VNICs on the switches, and building base environments.

Version 1.0.1 contains the following scripts that will be detailed later:

  1. genVNICSFromListLinkUp.sh
  2. genVNICSFromIBNetDiscover.sh
  3. genCNNetFiles.sh
  4. genIfcfgFiles.sh
  5. fixNetworkConfig.sh
  6. setupDefaultACSRack.sh

During the process of execution the scripts above will generate additional scripts that will be specific for Exalogic Rack they are being executed on.

Read more >>


Tuesday Feb 14, 2012

Bonding Parameters Based on Network Layout

Technical discussion on how to adjust Linux bonding configuration parameters depending on how a host participates in a given network. Limitations of link level failure detections and an easy solution within bonding driver to overcome it.

[Read More]

Networks and Virtualization

Technical discussion on an approach to achieve virtualization through network layers. Comparison between InfiniBand Partitions and Ethernet VLANs. Consolidation and Isolation of logical network channels leading to virtualization. How to satisfy computing platforms need to be multi homed ? If these are topics of interest to you, then read on.

[Read More]

Monday Feb 13, 2012

Switches Inside Oracle's Engineered Systems

An introduction to Oracle's InfiniBand switches providing immense bandwidth and high speed connectivity inside latest Engineered Systems. Brief comparisons, topology builds and overall network layout information.


[Read More]

Friday Feb 10, 2012

InfiniBand 101 - Building Blocks

In the context of Oracle's Engineered Systems, I am going to explain how an InfiniBand network is actually created using various building blocks of hardware and software. Includes a very basic view of a host participating in IB network and their connectivity to achieve redundancy and high availability.

[Read More]

Wednesday Feb 08, 2012

Exalogic and Multicast

Exalogic is the complete Engineered System from Oracle, delivering Hardware and Software in one solution. The software is primarily WebLogic (or Coherence, Tuxedo or other Oracle Middleware products)  with Linux or Solaris as the operating system. Customers will invariably cluster the WebLogic Server instances using multicast or unicast. There is one gotcha when it comes to using multicast on Exalogic. [Read More]

Friday Feb 03, 2012

Using LDAP for Shared Authentication (NFS v4 Requirement)

Just a quick post to let everyone know that Donald Forbes from our EMEA Engineered Systems Group, posted and excellent article on "Using LDAP for Shared Authentication (NFS v4 Requirement)". The post appears to be part 1 of a 3 part series. Thanks Don for starting this new technical blog. Given Don's expertise and inside track, we are definitely putting this blog on our watch list.

About

The primary contributors to this blog are comprised of the Exalogic and Cloud Application Foundation contingent of Oracle's Fusion Middleware Architecture Team, fondly known as the A-Team. As part of the Oracle development organization, The A-Team supports some of Oracle's largest and most strategic customers worldwide. Our mission is to provide deep technical expertise to support various Oracle field organizations and customers deploying Oracle Fusion Middleware related products. And to collect real world feedback to continuously improve the products we support. In this blog, our experts and guest experts will focus on Exalogic, WebLogic, Coherence, Tuxedo/mainframe migration, Enterprise Manager and JDK/JRockIT performance tuning. It is our way to share some of our experiences with Oracle community. We hope our followers took away something of value from our experiences. Thank you for visiting and please come back soon.

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