System News
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Articles for the keywords: LDOMs
28 Dec 2012 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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11 Oct 2012 Running Solaris 11 as a Control Domain on a T2000 [28013]
Installing Logical Domains 1.2 Solves the Problem

As increasing numbers of users running older T1-processor-based systems like T1000 and T2000 upgrade to Solaris 11, there are few problems since Solaris 11 runs on any T-series or M-series SPARC server. One case presents an exception, however: running Solaris 11 in a control domain on a T1000 or T2000 hosting logical domains. Jeff Savit addresses this complication in his post that, in fact, proves Solaris 11 can be installed on T2000 servers and used as a control domain by removing the preinstalled Oracle VM Server for 2.2 and installing Logical Domains 1.2 - the last version of LDoms to support T1-processor systems.
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05 Oct 2012 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 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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18 Jul 2012 Some Better Disk Backend Choices [26950]
What's Up with LDoms, Part 3

In "What's Up with LDoms,Part 3" Stefan Hinker looks at disk backend choices, reminding readers that, in his earlier postings, he had used a ZFS volume as a backend for the boot disk of mars. In this segment, Hinker examines some of the other ways to store the data of virtual disks. These include physical LUNs, in any variant that the Control Domain supports, including SAN, iSCSI, SAS, and the internal disks of the host system; Logical Volumes like ZFS Volumes, but also SVM or VxVM; Regular Files, which can be stored in any filesystem accessible by the LDoms subsystem.
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