A short introduction to our new rx7620 1 December 1, 2005 Basic - PowerPoint PPT Presentation

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A short introduction to our new rx7620 1 December 1, 2005 Basic Properties 8 CPUs - 1.6GHz Itanium2 (6MB L3 cache) 8GB RAM 14 PCI-X slots ( o nly ~8GB/s total I/O) Supports hardware partitioning No VGA port access

A short introduction to our new rx7620 1 December 1, 2005
Basic Properties ● 8 CPUs - 1.6GHz Itanium2 (6MB L3 cache) ● 8GB RAM ● 14 PCI-X slots (“ o nly” ~8GB/s total I/O) ● Supports hardware partitioning ● No VGA port – access only via serial port ● Weight ~100kg; Height 10U (rx2600 is 2U) ● Came in it’s own rack ● Nice, but incompatible with CERN standard racks :-( 2 December 1, 2005
Overview I 3 December 1, 2005
Overview II 4 December 1, 2005
Internal Layout 5 December 1, 2005
sx1000 Chipset - Schematics 6 December 1, 2005
Cell board - Design 7 December 1, 2005
I/O - Schematics 8 December 1, 2005
Possible Areas of Application ● Applications requiring massive I/O cpabilities ● CASTOR (disk-/tape-server) ● Dataexport to the LCG Tier-1 sites ● Massive parallel Applications ● Computational Fluid dynamics ● Database server ● Fast compile machine (to make Sverre happy :-) ) ● etc. 9 December 1, 2005
Installation - Hardware ● The positive side ● Very nice and simple to use mechanism to physically install the machine (~100kg+~60kg rack!!) ● Overall simple & smooth installation (except power distribution) ● The negative side ● Power cables are not supported at CERN ● Could re-use cables from another box which is not used anymore (big mess otherwise...) ● In General: HP seems to assume that the entire computing center follows one particular way of power distribution (I assume any vendor does that...) 10 December 1, 2005
Installation - OS/software ● OS installation could not be started because boot kernels did not boot (incl. HP Linux Enablement kit) ● Linux supports only a “simple” mapping partition ↔ I/O subsystem ● Machine had single partition but still two separate I/O subsystems ● nPartition manual (399 pages!!) a bit confusing (helpful only if you know what you’re looking for...) (...but I learned a lot about the internals of the box...) ● Hint from the Gelato mailinglist helped (“acpiconfig single-pci-domain”) ● PXE boot (Netboot) doesn’t work ● PXE protocol “spoken” by the NIC is not supported by our new network infrastructure!! (is it too new or too old?) ● Installed “private” DHCP-/PXE-/Installation-server and it worked :-) 11 December 1, 2005

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