Red Hat NETWORK WORKGROUP - USER 1.0 Instalační příručka stáhnout pdf (Strana 41)

I/O Subsystems

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Partitioning

SGI provides the ability to divide a single SGI Altix system into a collection of smaller

system partitions. Each partition runs its own copy of the operating system kernel and

has its own system console, root ﬁlesystem, IP network address, and physical memory.

All partitions in the system are connected via the SGI high-performance NUMAlink

interconnect, just as they are when the system is not partitioned. Thus, a partitioned

system can also be viewed as a cluster of nodes connected via NUMAlink.

Beneﬁts of partitioning include fault containment and the ability to use the NUMAlink

interconnect and global shared memory features of the SGI Altix to provide

high-performance clusters.

For further documentation and details on partitioning, see the SGI Altix UV Systems

Linux Conﬁguration and Operations Guide or the Linux Conﬁguration and Operations Guide.

I/O Subsystems

AlthoughsomeHPCworkloads mightbe mostlyCPU bound, others involveprocessing

large amounts of data and require an I/O subsystem capable of moving data between

memory and storage quickly, as wellas havingthe abilityto managelarge storagefarms

effectively.TheXFSﬁlesystem,XVMvolumemanager,anddatamigrationfacilitieswere

leveraged from IRIX and ported to provide a robust, high-performance, and stable

storage I/O subsystem on Linux. This section covers the following topics:

• “Persistent IP Addressing of Ethernet Interfaces” on page 19

• “XFS Filesystem” on page 20

• “XVM Volume Manager” on page 20

Persistent IP Addressing of Ethernet Interfaces

An Ethernet interface can be given a persistent internet addresses by associating its

permanent MAC address, such as 08:00:69:13:f1:aa, with an internet protocol (IP)

address,for example192.168.20.1.An interface withapersistent IPaddresswillbegiven

thesameIPaddresseachtimethesystemisbooted.Formoreinformation,see“Persistent

Network Interface Names” in the Linux Conﬁguration and Operations Guide.

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Red Hat NETWORK WORKGROUP - USER 1.0 Instalační příručka Strana 41