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Allan Jude
Works at Scale Engine
Attended Mohawk College
Lives in Hamilton, Ontario
2,533 followers|72,717 views
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Allan Jude

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Did a gource render (3d graphical representation of source code history) of the FreeBSD project's 20 year revision control history. The raw video footage came out at nearly 3.6 terabytes. Luckily #ZFS #LZ4 compression saved me from having half of my entire storage server eaten up:

media/gource  used                             705G
media/gource  available                      6.08T
media/gource  referenced                   705G
media/gource  compressratio             6.91x
media/gource  refcompressratio        6.91x
media/gource  written                          704G
media/gource  logicalused                   3.55T

I don't quite understand how it is calculating the compression ratio, but I am glad it saved my that much space (uncompressed .PPM video file)

Maybe +Matthew Ahrens can explain the [ref]compressratio figure
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Gource is actually very awesome!
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The first BSD Now is OUT: http://bit.ly/bsdnow1

+Allan Jude and +Kris Moore show you how to avoid intrusion detection systems, chat with Peter Hessler about #BGP spam blacklists, cover the news and more!

Enjoy: http://bit.ly/bsdnow1
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sweet!
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My first post on the official FreeBSD Now blog. Covering some of the new features on ZFS v5000 to be included in FreeBSD 9.2
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neet
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I can't actually get the interactive game to load... :(
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Allan Jude

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you think you can do the show from pcbsd?  What terminal emulator are you using? if that's the best you can do with putty, try mintty (https://code.google.com/p/mintty/)
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Another post on the FreeBSD Now Blog, Highlighting new features in 9.2 (LZ4 dataset compression in ZFS)
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Spoke with +Matthew Ahrens via twitter, the -D dedup thing creates a DDT on the sender side, basically lets you dedup after the fact, but still has all of the original costs, so nothing special here, unless you decide you want dedup and need to re-process existing data to dedup it.
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+Adam Field Welcome to G+. What have you been up to lately?
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Nice to see you posting +Allan Jude. Love TechSNAP, and BSD.
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RAID10 (which wouldn't actually have a name in ZFS, it would just be the automatic stripping across 2 or more sets of mirrors) would still require a resilver to the replacement disk when a disk dies. RAID10 would only give you 4x the size of your drive in storage space, whereas RAIDZ1 would give you 7x. with 8 disks, you could do either RAIDZ2 (6x the size of your drives, and double redundancy, so your ok even if 2 drives die at once), or RAID50 (stripe across two RAID Z1s of 4 disks each) which would be faster than the Z2, but less safe (if 2 disks in the same Z1 die before you resilver, you lose the data)
 
Just read thru the ZFS on Linux FAQ. The most attractive part: such nice Ubuntu support. Well well...SSD cache support. I feel like giving up on LVM now. http://pingd.org/2012/installing-zfs-raid-z-on-centos-6-2-with-ssd-caching.html
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Definitely go FreeBSD, and yes, what i meant was your usable space would be 4n (where n is the size of the smallest drive), but +Dan Langille is correct, it would have been clearer to say 4/8s or 1/2 of the drive space
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Boom
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FPS Russia is Crazy^^
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In his circles
231 people
Have him in circles
2,533 people
Chris Houren's profile photo
Work
Occupation
Scalability Consultant, Security Analyst and Teacher
Employment
  • Scale Engine
    Vice President, Operations Manager, 2008 - present
  • ThunderIT Consulting Inc.
    CEO, 2006 - 2008
  • Mohawk College of Applied Arts and Technology
    Professor, 2007 - 2010
  • ShellFusion.net
    Owner, 2002 - 2006
  • Idea Works @ Mohawk College: Applied Research
    Scalability Consultant and Chief Architect, 2011 - 2011
Places
Map of the places this user has livedMap of the places this user has livedMap of the places this user has lived
Currently
Hamilton, Ontario
Previously
Jarvis, Ontario
Story
Tagline
Network Engineer/Security Analyst, Server Admin, Teacher, Podcaster and Web App Developer
Introduction
Allan Jude is one of Canada's top hosting and E-Commerce consultants. He pioneered the ScaleEngine system for scaling web applications, and has built a custom business relationship, content management and distribution system that currently runs the online shopping websites SharkSystems.com, OMGCafe.com and various other e-commerce and e-relations websites. He holds both the Network Systems and Network Engineer and Security Analyst Diplomas from Mohawk College in Hamilton, where he taught in the Computer Science department.
Education
  • Mohawk College
    Network Engineering and Security Analysis, 2003 - 2006
  • Hagersville Secondary School
    1999 - 2003
  • Jarvis Public School
  • JL Mitchener
Basic Information
Gender
Male