|3.0 GHz 8-Core Xserve
|8053 Ops/Sec (Overall Response Time = 1.37 msec)
|3.0 GHz 8-Core Xserve
|SFS License Number
The Apple Xserve system is a server providing network file service, utilizing a direct-attached Promise fibre channel RAID storage system.
|3.0 GHz 8-Core Xserve with 16GB (8x2GB) of RAM
|4-port 4Gbps Fibre Channel adapter, firmware 18.104.22.168
|Apple dual-port gigabit ethernet adapter
|VTrak E-class SAS Fibre channel RAID array with dual controllers and 16 drives, firmware SR2.4/AEK
|VTrak J-class SAS JBOD enclosure and drives
|OS Name and Version
|Mac OS X Server v10.5.1 (9B2117a)
|Spotlight indexing disabled
|Set via service com.apple.metadata.mds off
|Increase the metadata cache maximum size
|Set via sysctl -w kern.maxvnodes=380000
|Increase the metadata cache buffers available
|Set via sysctl -w kern.maxnbuf=120000
|Number of NFS Threads
|Set via serveradmin settings nfs:nbdaemons=110
The sysctl tunings above increase the maximum size of the filesystem metadata cache.
|Number of Disks
|This set of 48 disks is divided into 6 8-disk RAID-0 groups that are each exported as a single LUN. All data file systems reside on these disks.
|This single boot disk is for system use only.
|Number of Filesystems
|Total Exported Capacity
|Filesystem Creation Options
|Each filesystem uses one LUN with 64K RAID0 stripes, 8 drives per file system.
Each filesystem uses one LUN using HFS+ Journaled's default configuration. The hardware RAID deviates from its defaults using ReadCache and WriteBack on each file system, and each controller is set to have Host Cache Flushing disabled. All other hardware RAID settings are the default, including using 64KB stripe size. The fibre channel RAID is direct attached to the Xserve.
|Number of Ports Used
|Included motherboard ethernet ports
|PCI-Express ethernet add-in card.
All network interfaces were connected to a Linksys SRW2024 switch.
Sets of two clients were attached to a single subnet, 3 subnets total. Interconnect was via a Linksys SRW2024 gigabit switch.
|Intel(R) Xeon(R) CPU E5472, 3.0 GHz, 2 chips, 8 cores, 4 cores/chip, 8MB L2 cache, 1.6 GHz FSB, DDR2 FB-DIMM memory
|TCP/IP, NFS protocol, HFS+ filesystem
|Size in GB
|Number of Instances
|Xserve main memory, 800MHz DDR2 FB-DIMM
|Hardware RAID system main memory, with 72-hour battery backup
|Grand Total Memory Gigabytes
The mirrored write cache is backed up with a battery unit able to retain the write cache for 72 hours in the event of a power failure.
NFS stable write and commit operations are not acknowledged until after the RAID storage system has acknowledged that the related data stored at least in non-volatile RAM. The storage array has dual storage processor units that work as an active-active failover pair. When one of the storage processors or battern units are off-line, the system turns off the write cache and writes directly to disk before acknowledging any write operations.
Default configuration, except as listed in Server Tunings.
Spotlight indexing was disabled.
|Macintosh with 512MB RAM and Mac OS X 10.4.11
|LG Type Name
|BOM Item #
|Intel Yonah processor
|Number of Processors (chips)
|Number of Cores/Chip
|OS X 10.4.11 (8S2167)
|Network Attached Storage Type
|Number of Load Generators
|Number of Processes per LG
|Biod Max Read Setting
|Biod Max Write Setting
All filesystems were mounted on all clients, which were connected to the same physical network.
Each client has the same file system mounted from the server.
(No other report notes)
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First published at SPEC.org on 18-Mar-2008