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More Linux Legalese


Backup


  • Do you know if your Backup System actually works ??
    • Did you restore the system from backups onto a virgin disk ??

  • If your disks crashed right now...
    • Can you recover your data ??
    • How long will it take for you to recover your data ??
    • Do you upgrade to a new distro w/ all the patches or same distro with known bugs/problems ??

  • NEVER backup your data on the same partition or same disk or same server...

  • Backups are highly prone to many un-noticed FAILURES until you happen need a perfect backup to fix a crash disk ...



600 TeraByte per rack Backup System


  • 100 Blades per rack or just 40x 1U chassis per rack ( MyQuotes@ITX-Blades.net )
    • 6TB ( 4x 1.5TB disk ) per Blade
    • 60TB ( 10x blades ) per 4U Chassis
    • 600TB ( 10x 4U chassis ) per 42U Rack

    • 10x Blades Horizontally, one blade for each day of the week
    • 10x 4U Chassis Vertically, one chassis for each week of the month
    • combine/split data amongst the blades to get the necessary capacity

  • Put today's 7-day incremental backup on a DIFFERENT server than yesterday
    • Put 30-day incremental onto today-chassis+1-blade-8
    • Put 90-day incremental onto today-chassis+2-blade-9
    • Put 180-day incremental onto today-chassis+3-blade-10

    • Put this week's Full Backups onto chassis-8
    • Put next week's Full backups onto chassis-9
    • Put 3rd week's Full backups onto chassis-10

  • 7-day Rotation Scheme
    • the backup scripts should use the Month, Week and Date or S-M-T-W-T-F-S to figure out which blades to use today

Week-1 S M T W T F S 8 9 0    192.168.1.x    Jan 1, 8, 15, 22, Feb 1, 8, 15, 22
Week-2 S M T W T F S 8 9 0    192.168.2.x    Jan 2, 9, 16, 23
Week-3 S M T W T F S 8 9 0    192.168.3.x    Jan 3, 10, 17, 24
Week-4 S M T W T F S 8 9 0    192.168.4.x    Jan 4, 11, 18, 25

Week-5 S M T W T F S 8 9 0    192.168.5.x    Jan 5, 12, 19, 26
Week-6 S M T W T F S 8 9 0    192.168.6.x    Jan 6, 13, 20, 27
Week-7 S M T W T F S 8 9 0    192.168.7.x    Jan 7, 14, 21, 28
Week-8 S M T W T F S 8 9 0    192.168.8.x
Week-9 S M T W T F S 8 9 0    192.168.9.x
Week-10 S M T W T F S 8 9 0    192.168.10.x

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Updated: Wed Mar 23 01:08:01 2011 PDT