UFO Server

Areca Raid Configuration

• A single Areca-1880 controller handles both external storage box with SATA hard drives and internal SSD cache. Only pair of system hard drives is connected to the SATA controller embedded in the motherboard.
• 16 x Hitachi 2TB SATA hard drives in the external enclosure are organized as Raid-6
• 4 x Crucial SSD C300 in the server case are organized as Raid-0

Partitioning

• Two system hard-drives are connected to internal SATA controller and mirrored as Raid-1 using Linux Software Raid.
  • Devices: /dev/sda, /dev/sdb
  • Partitions: /boot (2GB ext2), / (256GB ext4), /home (ext4)
• The RAID is split into the 2 partitions (GPT partition table): the fast and normal.
  • Device: /dev/sdc
  • The fast partition will be used to stream the data from the camera and should be able to stand throughput of 850 MB/s. The data should be moved out as soon as possible. Only a single application is allowed to write to the disk.
    • Size: first 6TB of disk array
    • File system: non-journaled ext4
    • Mount point: /mnt/fast
  • Standard partition is for short term data storage (before offloading to LSDF)
    • Size: 22 TB
    • File system: ext4
    • Mount point: /mnt/raid
• The SSD cache
  • Size: 1 TB
  • File system: ext4
  • Mount point: /mnt/ssd
• Partition table

  Disk /dev/sda: 2000.4 GB, 2000398934016 bytes
  255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disk identifier: 0x0003874d
  
     Device Boot      Start         End      Blocks   Id  System
  /dev/sda1   *        2048     4192255     2095104   fd  Linux raid autodetect
  /dev/sda2         4192256   541069311   268438528   fd  Linux raid autodetect
  /dev/sda3       541069312  3907028991  1682979840   fd  Linux raid autodetect
  
  Disk /dev/sdc: 28.0TB
  Sector size (logical/physical): 512B/512B
  Partition Table: gpt_sync_mbr
  
  Number  Start   End     Size    File system  Name     Flags
   1      1049kB  6597GB  6597GB               primary
   2      6597GB  28.0TB  21.4TB  xfs          primary
  
  Disk /dev/sdd: 1000.0 GB, 999998619648 bytes
  255 heads, 63 sectors/track, 121576 cylinders, total 1953122304 sectors
  Units = sectors of 1 * 512 = 512 bytes
  Sector size (logical/physical): 512 bytes / 512 bytes
  I/O size (minimum/optimal): 512 bytes / 512 bytes
  Disk identifier: 0x000b6bc3
  
     Device Boot      Start         End      Blocks   Id  System
  /dev/sdd1            2048  1953122303   976560128   83  Linux
  

• Raid table:

  Personalities : [raid1] [raid0] [raid10] [raid6] [raid5] [raid4] 
  md2 : active raid1 sdb3[1] sda3[0]
        1682979704 blocks super 1.0 [2/2] [UU]
        bitmap: 3/13 pages [12KB], 65536KB chunk
  
  md0 : active raid1 sdb1[1] sda1[0]
        2095092 blocks super 1.0 [2/2] [UU]
        bitmap: 0/1 pages [0KB], 65536KB chunk
  
  md1 : active raid1 sda2[0] sdb2[1]
        268438392 blocks super 1.0 [2/2] [UU]
        bitmap: 0/3 pages [0KB], 65536KB chunk
  

• fstab

  /dev/disk/by-id/md-uuid-4a18bb5c:4b4b4490:929fdc08:99b65f2f /                    ext4       acl,user_xattr        1 1
  /dev/disk/by-id/md-uuid-7c032686:e8861a19:9ccb43c3:8f25011e /boot                ext2       acl,user_xattr        1 2
  /dev/disk/by-id/md-uuid-8e7c863e:3a75af81:321862ae:d679602e /home                ext4       acl,user_xattr        1 2
  /dev/disk/by-id/scsi-2001b4d2003077811-part2 /mnt/raid            xfs        defaults              1 2
  /dev/disk/by-id/scsi-2001b4d2064473251-part1 /mnt/ssd             ext4       acl,user_xattr        1 2
  proc                 /proc                proc       defaults              0 0
  sysfs                /sys                 sysfs      noauto                0 0
  debugfs              /sys/kernel/debug    debugfs    noauto                0 0
  usbfs                /proc/bus/usb        usbfs      noauto                0 0
  devpts               /dev/pts             devpts     mode=0620,gid=5       0 0
  

Software

• OpenSuSe 12.1
  • Gnome Desktop
  • Console tools
  • Development: Kernel, Gnome, Python
• CUDA
  • Driver: 285.05.32
  • Toolkit: 4.1 (installed into /opt/cuda)
  • SDK: 4.1 (installed into /opt/cuda/sdk)
• PyHST
• UFO Framework