$333 per gigaflop Technology Overview

$333 per gigaflop

Technology Overview

Xserve G5

LINPACK: Double-Precision Calculations

Apple offers compute power at the lowest cost per gigaflop of any tier- one vendor—only $333 per gigaflop, or $333,000 per teraflop.5

Xserve G5

Dual 2GHz PowerPC G5

Dell PowerEdge 1750

Dual 3.2GHz Xeon

IBM eServer x335

Dual 3.2GHz Xeon

IBM eServer x325

Dual 2GHz Opteron

9 gigaflops

246810

Billions of floating-point operations per second (gigaflops)

A/G BLAST

A/G BLAST is a version of NCBI BLAST developed by Apple in collaboration with Genentech. Optimized for dual PowerPC G5 processors, the Velocity Engine, and the symmetric multiprocessing capabilities of Mac OS X, A/G BLAST makes a wide variety of searches available at higher speeds.

Two double-precision floating-point units enable the dual 2GHz Xserve G5 to perform the linear equations 8 percent faster than the 3.2GHz Xeon-based servers and 50 percent faster than the 2GHz Opteron-based server.

BLAST

To demonstrate the advantages of Xserve G5 for processor-intensive scientific analysis, Apple used Basic Local Alignment Search Tool, or BLAST. BLAST is a popular open source biotechnology application used by life science researchers to find matches in DNA and protein sequences. BLAST searches are based on word size, or the number of nucleotide pairs specified by the researcher to register as a match. Different word sizes are used for different kinds of research, and users can adjust word size to the sensitivity appropriate to their needs. With long-word-size, or high-performance, searches, the researcher is looking for similarities between DNA sequences that are nearly identical. For short-word-size searches (fewer than11), the researcher is com- paring more distantly related sequences; these searches require high resolution to find the small matches between dissimilar sequences.

BLAST: DNA Sequence Matching

	3.5
	3.0						Dual 2GHz Xserve G5
second	3.0
second	2.5
per
of nucleotides	2.0
	1.5
							Dual 2GHz IBM eServer x325
Millions	1.0						Dual 2GHz IBM eServer x325
	1.0						Dual 3.2GHz IBM eServer x335
							Dual 3.2GHz IBM eServer x335
							Dual 3.2GHz Dell PowerEdge 1750
	.5
	.5
	0
	8	10	11	20	30	35	40

Word length

In common searches using a word size of more than 11, Xserve G5 far outperformed

the Xeon-based servers. Even at word size 11, for which NCBI BLAST has been extensively optimized, Xserve G5 performed on par with the competition.

Xserve G5 specifications

The Apple Xserve G5 was a powerful rack-mounted server that was introduced by Apple in 2004. Built on the robust PowerPC architecture, it marked a significant entry into the enterprise server market for the company, reflecting its commitment to high-performance computing and advanced technology solutions.

One of the main features of the Xserve G5 was its dual dual-core PowerPC G5 processors, which allowed for exceptional computation performance. This configuration enabled up to 8 processing cores in a single server unit, significantly enhancing multitasking capabilities and making it suitable for high-demand applications. With support for up to 16GB of DDR SDRAM, the server ensured ample memory for intensive operations and large-scale data processing tasks.

In terms of storage, the Xserve G5 featured a versatile design that supported up to four hot-swappable Serial ATA (SATA) drive bays. This capability enabled users to easily replace or upgrade hard drives without downtime, which is crucial in enterprise environments. The server also supported RAID configurations, offering options for increased reliability and data redundancy.

Networking capabilities were another highlight of the Xserve G5. It came equipped with dual Gigabit Ethernet ports, providing robust network throughput and redundancy. This feature was particularly valuable for mission-critical applications where uptime and performance were essential. Additionally, the Xserve G5 was compatible with various networking protocols and featured built-in support for Active Directory, simplifying integration into existing IT infrastructures.

The operating system of choice for the Xserve G5 was Mac OS X Server, which offered a user-friendly interface along with powerful server management tools. The software provided a wide range of services, including file sharing, web hosting, and email services, tailored for small to medium enterprises and education institutions.

For those seeking expandability, the Xserve G5 boasted a PCI-X expansion slot, allowing users to add various hardware components such as additional network interfaces or specialized processing cards.

In terms of its physical design, the Xserve G5 had a sleek, 1U form factor, making it easy to integrate into existing server racks while maintaining a modern aesthetic. The efficient cooling system was designed to keep the unit running optimally, ensuring reliability during extended periods of use.

In conclusion, the Apple Xserve G5 represented a significant advance in server technology with its powerful dual G5 processors, ample memory and storage options, and robust networking capabilities. Its combination of performance and user-friendly Mac OS X Server made it a notable choice for organizations seeking reliable computing solutions in the mid-2000s.