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Molmol is the File Server. See also: [[MoneyMoneyMoney/NewStorage]]. Molmol is the File Server. See also: [[MoneyMoneyMoney/NewStorage]], where it was motivated and specc'd out.

molmol

Molmol is the File Server. See also: MoneyMoneyMoney/NewStorage, where it was motivated and specc'd out.

Hardware

The "Sick of your moaning" design is *almost* what we have. Except the PSU, case, SAS expander card, and (hopefully soon) an SSD bay. It is basically the same. People who care to correct this.

System Drives

There are 2 SSDs, partitioned with a GUID Partition Table (GPT).

  • Partition 1 on both stores the boot loader (FreeBSD's gptboot).

  • Partition 2 on both contains a FreeBSD GEOM MIRROR (with a GPT type of freebsd-ufs) containing the root file system.

  • Partition 3 on both forms a mirror for the ZFS SLOG (journal).
  • Partition 4 on both forms a spanned (i.e. not mirrored) ZFS L2ARC (disk cache).
  • Partition 3 on both are two swap partitions, both of which are enabled as separate swap devices (i.e. spanned, not mirrored).

[email protected] ~# gpart show
#    Start        Size  Part# Type
=>       34  500118125  ada0  GPT  (238G)
         34       1000     1  freebsd-boot  (500K)
       1034       1014        - free -  (507K)
       2048   79691649     2  freebsd-ufs  (38G)
   79693697    4192385     5  freebsd-swap  (2.0G)
   83886082    4194304     3  freebsd-zfs  (2.0G)
   88080386  412037773     4  freebsd-zfs  (196G)

=>       34  500118125  ada1  GPT  (238G)
         34       1000     1  freebsd-boot  (500K)
       1034       1014        - free -  (507K)
       2048   79691649     2  freebsd-ufs  [bootme]  (38G)
   79693697    4192385     5  freebsd-swap  (2.0G)
   83886082    4194304     3  freebsd-zfs  (2.0G)
   88080386  412037773     4  freebsd-zfs  (196G)

The GEOM MIRROR RAID is monitored by setting daily_status_gmirror_enable="YES" in /etc/periodic.conf.

ZFS

Assembled the RAID along the lines of https://pthree.org/2012/04/17/install-zfs-on-debian-gnulinux/

[email protected]:~# zpool status
  pool: space
 state: ONLINE
  scan: scrub repaired 0 in 2h9m with 0 errors on Tue Oct 21 21:30:01 2014
config:

        NAME                  STATE     READ WRITE CKSUM
        space                 ONLINE       0     0     0
          mirror-0            ONLINE       0     0     0
            da0               ONLINE       0     0     0
            da1               ONLINE       0     0     0
          mirror-1            ONLINE       0     0     0
            da2               ONLINE       0     0     0
            da3               ONLINE       0     0     0
          mirror-2            ONLINE       0     0     0
            da4               ONLINE       0     0     0
            da5               ONLINE       0     0     0
          mirror-3            ONLINE       0     0     0
            da6               ONLINE       0     0     0
            da7               ONLINE       0     0     0
        logs
          mirror-4            ONLINE       0     0     0
            gpt/molmol-slog   ONLINE       0     0     0
            gpt/molmol-slog0  ONLINE       0     0     0
        cache
          gpt/molmol-l2arc    ONLINE       0     0     0
          gpt/molmol-l2arc0   ONLINE       0     0     0

[email protected]:~# zfs list
NAME             USED  AVAIL  REFER  MOUNTPOINT
space           1.73T  1.83T   200K  /space
space/away       909G  1.83T   909G  /space/away
space/mp3s       281G  1.83T   281G  /space/mp3s
space/scratch    192K  1.83T   192K  /space/scratch
space/services   585G  1.83T   585G  /space/services
space/vmstore    144K  1.83T   144K  /space/vmstore

Compression is on: zfs set compression=lzjb space - you can see how well it's working with zfs get compressratio

Other notes

In order to prevent a hang on shutdown, the following (sourced from PCBSD)has been added to /etc/sysctl.conf:

# Don't hang on shutdown when using USB disks
hw.usb.no_shutdown_wait=1

HOW DO I FREEBSD

Don't panic. The documentation is super good - start with The FreeBSD Handbook.

There is a clear separation between "base system" and "additional software" in FreeBSD - more along the lines of how Windows does it. Most "additional software" gets installed and configured in /usr/local, so if in doubt, look there (e.g. /usr/local/etc).

Install new software with pkg(8) (e.g. pkg install zsh).

Configuration of base system services is done with /etc/rc.conf, and additional software services in /usr/local/etc/rc.conf.

Use zpool and zfs to manipulate ZFS - see the ZFS on Linux tutorial for a good introduction to the concepts.


CategoryMachines