Sharing FCP adapters through virtualization

Srikrishnan, J.; Amann, Sven; Banzhaf, G.; Brice, F. W.; Dugan, R.C.; Frazier, Greg; Kuch, G.; Leopold, Jürgen

doi:10.1147/rd.511.0103

Cited by 3 publications

(2 citation statements)

References 2 publications

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“…Overview of T10 data integrity field The FCP channel [6,7] on zEnterprise supports end-to-end data protection, as defined by recent enhancements to the SCSI standard for direct-access block devices, in particular disks, i.e., defined in the International Committee for Information Technology Standards (INCITS) documents [8,9]. This standard introduces an 8-byte data integrity field (DIF) that is appended to each data block, thus increasing the typical 512-byte SCSI block size to 520 bytes.…”

Section: Fcp End-to-end Data Protectionmentioning

confidence: 99%

IBM zEnterprise storage I/O advancements

Amann

Banzhaf

Bender³

et al. 2012

IBM J. Res. & Dev.

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Section: Fcp End-to-end Data Protectionmentioning

confidence: 99%

IBM zEnterprise storage I/O advancements

Amann

Banzhaf

Bender³

et al. 2012

IBM J. Res. & Dev.

Self Cite

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“…This would necessitate purchase of a potentially significant number of HBAs, regardless of whether each VM has a workload that fully utilizes the capacity of an HBA. Typically, servers do not even provide for the installation of a large number of HBAs that would be required to accommodate the number of VMs a server can host, which can be more than a thousand in configurations such as IBM System z9 with z/VM [5] or 32 VMs by using hypervisors like Microsoft Virtual Server 2005 and VMWare ESX on an offthe-shelf server. Hence, a need for a new mechanism to allow the sharing of a physical N_Port among the VMs, providing an addressing capability to uniquely identify each VM to the SAN fabric and allow use of existing SAN zoning techniques to ensure security and eliminate the limitations mentioned above was necessitated.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis of a fibre channel switch supporting node port identifier virtualization: Preliminary results

Muknahallipatna¹,

Miles²,

Johnson

2009

2009 IEEE 34th Conference on Local Computer Networks

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The server virtualization architecture, encompassing the sharing of data storage subsystems among the virtual servers or operating systems on a single host server using I/O channel sharing capabilities in fibre channel fabrics, was pioneered by IBM through their System z9 mainframe and its predecessors. The implementations of I/O channel sharing capabilities were based on the fibre connectivity channel standard. With the advent of sharing small computer system interface devices among host servers in storage area networks using the fibre channel protocol, certain problems arose in sharing the I/O channels between virtual servers on a host. To implement server virtualization with this new environment, IBM invented the N_Port identifier virtualization architecture, which is now part of the fibre channel standards. This paper examines the performance of a Fibre channel switch supporting N_Port identifier virtualization. In particular, the switch latency for discover fabric services command during the process of granting multiple virtual N_Port identifiers to single and multiple hosts, hosting a large number of virtual servers is examined.

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Leveraging virtualization to optimize high-availability system configurations

Loveland¹,

Dow²,

LeFevre³

et al. 2008

IBM Syst. J.

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Leveraging redundant resources is a common means of addressing availability requirements, but it often implies redundant costs as well. At the same time, virtualization technologies promise cost reduction through resource consolidation. Virtualization and high-availability (HA) technologies can be combined to optimize availability while minimizing costs, but merging them properly introduces new challenges. This paper looks at how virtualization technologies and techniques can augment and amplify traditional HA approaches while avoiding potential pitfalls. Special attention is paid to applying HA configurations (such as active/active and active/passive) to virtualized environments, stretching virtual environments across physical machine boundaries, resource-sharing approaches, field experiences, and avoiding potential hazards.

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Sharing FCP adapters through virtualization

Cited by 3 publications

References 2 publications

IBM zEnterprise storage I/O advancements

IBM zEnterprise storage I/O advancements

Performance analysis of a fibre channel switch supporting node port identifier virtualization: Preliminary results

Leveraging virtualization to optimize high-availability system configurations

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