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Articles for the keywords: CMT
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13 Feb 2013
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Rick Hetherington on the SPARC T5 [29778]
Plus 'SPARC T5: 16-core CMT Processor with Glueless 1-Hop Scaling to 8-Sockets': Hot Chips Presentation
Rick Hetherington delivers an overview of the SPARC T5 processor, explaining how doubling the number of S3 cores allows the T5 to achieve 2X throughput improvements, and how 28 nanometer silicon enables clock speed increases to 3.66 Gigaherz (GHz). Hetherington adds that on-die PCI Express Rev 3 results in a doubling of I/O bandwidth. Scaling the SPARC T5 to eight sockets and 16 cores gives the processor the capability of gluelessly interconnecting eight sockets for a total of 128 cores, each supporting up to eight independent threads totaling 1024 CPUs. An accompanying Hot Chips presentation provides a detailed look at the SPARC T5.
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17 Jan 2013
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Slide Sets for Two DOAG Talks: LDoms and T4 Red Crypto Stack [29388]
Considering IO Ooptions for both Disk and Networking; Securing the Database
The DOAG Konferenz & Ausstellung 2012 featured two presentations by Stefan Hinker, for which he now shares the slides in an oracle.com post. The first was entitled "LDoms IO Best Practices,"] in which he discussed different IO options for both disk and networking and gave recommendations on how to choose the right ones for your environment. The second, co-presented with Heinz-Wilhelm Fabry, was entitled "T4 and the Red Crypto Stack." The presenters showed how to use encryption and other security mechanisms throughout the red stack to deploy a quite well secured database.
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28 Dec 2012
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What's up with LDoms: Part 6 - Sizing the IO Domain [29085]
Overcoming the Bottleneck with More Precise Compute Resource Allocation
Continuing his series on "What's Up with LDoms," Stefan Hinker turns to Sizing the Control DomaIn and the IO Domain, asking how much CPU and memory the Control and IO-domain need to provide bottleneck-free virtual network and disk services to the guests. The bulk of the CPU resources will be used by disk services, network services and live migration. A single core on T4 for each IO domain should be sufficient. On larger systems with higher networking demands, two cores for each IO Domain might do. If your CPU resource allocation requires additional adjustment, Hinker recommends using mpstat (1M) and DimSTAT for further analysis.
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05 Oct 2012
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What's up with LDoms: Part 4 - Virtual Networking Explained [27921]
Physical vs. Virtual Switches and Networking: Not so Diffrerent After All
Stefan Hinker continues his "What's up with LDoms" series with part 4: which concentrates on virtual networking -- the capabilities of virtual switches and virtual network ports. Hiniker demystifies his subject by citing the similarities between virtual and physical switch hardware and cabling, demonstrating that the differences are minimal. His discussion covers assigning MAC addresses; using Jumbo Frames and sizing MTU throughput rates; and VLAN tagging for consolidation of traffic. He also advises users in a concluding note to assign each vnet device an explicit device-id that will preserve the configuration of guest systems.
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13 Sep 2012
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Secure Deployment of Oracle VM Server for SPARC [27612]
Revised Edition Prompted by SPARC T4-4
Stefan Hinker announces a revised version of his earlier paper, "Secure Deployment of Oracle VM Server for SPARC." The revision, he writes, was prompted by the novel hardware partitioning capabilities of the Oracle SPARC T4-4, which assigns full PCIe root complexes to domains, mimicking dynamic system domains. Hinker makes clear his intention, which was to address only those configuration options directly related to that platform and to virtualization. Hinker's Oracle technical white paper is downloadable as a pdf at the link above.
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