Competitive Profiles Datasheet IBM - eServer p5 595

Short Description
The eServer p5 595 is a 64 core POWER5 based server which was announced in October 2004 along with the smaller p5-590. It is housed in up to two 42U rack cabinets and is comprised of an 18U Central Electronics Complex (CEC) and up to eight I/O drawers. The p5-595 uses dual core POWER5 processors which, at the time of introduction, were available at 1.65GHz or 1.9GHz with 36MB of shared L3 cache. A minimum of 16 active processor cores is required. Between 8GB and 2TB of memory is supported, although the maximum amount of DDR2 memory is 1TB. All disk storage and I/O expansion slots are housed in I/O drawers, each containing 20 PCI-X slots and 16 drive bays. With the maximum of 12 I/O drawers a fully configured p5-595 supports up to 240 I/O slots and 192 disk drives.

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Content
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The main building block of the p5-595 is the CEC which houses the processors, memory and system backplane along with associated power and cooling functions. From one to four processor books can be added, each with 16 inactive processor cores. At least 16 processor cores must be activated in a minimum configuration. Each 16 core processor book contains two 8 core multi-chip modules (MCMs) and each processor chip has 1.9MB L2 and 36MB L3 cache shared between the two cores. At the time of introduction processors were available at standard (1.65GHz) and turbo (1.9GHz) speeds. Each processor book has 16 memory card slots for a maximum of 64 memory cards per server. Both DDR1 and DDR2 memory is available, however DDR2 memory is constrained to 16GB per card. All I/O expansion slots and disk drive bays are housed in 4U I/O drawers. At least one draw is required and a maximum of 12 can be added. Each draw has 20 PCI-X slots and houses either eight or 16 drive bays. A maximum configured p5-595 with 12 I/O drawers can house up to 240 PCI-X slots and 192 disk drives. All PCI-X slots support either 32-bit or 64-bit PCI or PCI-X adapters. At the time of writing only 15,000rpm Ultra320 SCSI disk drives were supported. IBM POWER5 processors, when using AIX v5.3, support simultaneous multithreading (SMT) which IBM claims can increase performance by around 20% to 35%. However SMT is not available on AIX v5.2 which is also supported by the POWER5 systems for those clients who don’t want to upgrade to v5.3 at this time. The IDEAS OLTP Relative Performance estimates are based on workloads running AIX v5.3. For workloads running AIX V5.2 performance expectations should be adjusted accordingly. In February 2005 IBM introduced a Capacity BackUp program for the p5-595. This involves a 4/32 core or 4/64 core p5-595 hosted in an offsite location as a disaster recovery solution.
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