• Engineered storage architecture
  - for high performance, quality and reliability
• Exists and operates in dedicated user accounts
  - self-contained, sealed and easy to migrate environment
• Flat, human readable storage structure
  - to ensure data is retrievable and code is comprehensible
• Highly resilient and robust
  - to minimise the risk of data loss over many years
• Large volume capacity (TB's)
  - extremely low cost storage
• Low operational and maintenance overheads
  - reduced cost of ownership
• Manage independently from a Perl enabled workstation
  - for a highly manageable solution
• Manage long-term archives
  - software that will guarantee retrieval over time
• Migratable nodes
  - replace hardware without changing the backup software infrastructure
• Multiple configuration files for multiple installations
  - to simplify multiple installation management
• Perl installer and configurator
  - for a stable and mature cross-platform environment
• Powered by rsync and OpenSSH
  - to utilise the powerfull rsync data transfer algorithm
• Repair tool
  - allowing broken nodes to be rebuilt
• Scalable
  - grows with your disk and network capacity
• Secure design
  - to prevent data compromises and minimise the risk of vulnerabilities
• Simple configuration file and format
  - to ease installation and maintenance overheads
• Standards compliant
  - allowing tight systems integration and interoperability
• Stats and analysis tools built-in
  - assisting the deployment manager and administrators
• Straightforward upgrade procedure
  - to allow new features, enhancements and fixes to be deployed quickly
• Use commodity disks for robust storage
  - reduce long-term storage costs
• UTC Time Zone compensation mechanism
  - nodes can exist across time zones
• Works with existing backup infrastructures
  - seamlessly integrate without duplicating deployment costs
• 3 replicating storage nodes
  - for optimal performance vs maximum data redundancy

# Create a new partition on the disk

fdisk /dev/sdb

# Generate a mapping and LUKS partition

cryptsetup --verbose --verify-passphrase luksFormat /dev/sdb1

cryptsetup luksOpen /dev/sdb1 sdb1

# Format the partition

mkfs.ext3 -j /dev/mapper/sdb1 

# Mount the partition for the first time

mount /dev/mapper/sdb1 /mnt/crypt/

df -h

# Open and mount the device after reboot or disk removal

cryptsetup luksOpen /dev/sdb1 sdb1

mount /dev/mapper/sdb1 /mnt/crypt/

# Umount and close

umount /mnt/crypt/
cryptsetup luksClose sdb1

    # non distinct binary volume alternative collection
    # run as a cron job independently of DIASER

    sub non_full_binary {
        look for directories, if directories
        ls
        if($directories) {

        check for a previous tar Full
         
        -> if no Full this month then tar/shasum/date 
        any directories collected for Full -> Full01 slot and
        name with the chosen Full volumes prefix.
        
        check for a previous tar Diff
        
        -> if Full this month then create a 
        tar/shasum/date Diff against it for the day slot
        name with the chosen Diff volumes prefix.
    }

 DIASER Usage: diaser_setup.pl 

    --help                 help|-?

    --bandwidth            calculate real bandwidth throughput between nodeX-Y
    --configure            question driven configuration tool
    --extend               extend maximum storage structure date 
    --install              install
    --list                 list all volumes in storage
    --lock                 lock all DIASER node accounts
    --logs                 condensed log readings from nodes
    --migrate              migrate node 
    --modify   [opts]      send modified configuration to nodes either
                           from conf file or command options or both
    --pause                pause operation 
    --recreate             recreate a single node from scratch
    --remove               remove from nodes, all data will be lost 
    --resume               resume operation 
    --retrieve [opts]      retrieve archive data 
    --stats                generate statistics 
    --stop                 stop operation 
    --upgrade              apply upgrades    
    --version              show version  
                                              
 For more information please use man diaser or the more detailed
 online manual: http://diaser.org.uk/manual.html

 Please send any FEEDBACK to dbrasher@interlinux.co.uk.
 I'm especially interested in how DIASER may be of use to you now or in the future.
 Thank you.

--numyear   years of operation required
--startyear year to begin storing archives, this can be in the past
--phase1    hour between 0 and 23
--phase2    hour between 0 and 23
--nodea     ip address in format 0.0.0.0
--nodeb     ip address in format 0.0.0.0
--nodec     ip address in format 0.0.0.0
--dryrun    boolean 1(y) or 0(n)
--lmb       lowest maximum bandwidth, KBytes per second
--tzone     [not yet implemented]
--tout      copy time out in seconds
--fillstarttime     time to run DIASER fill operation, hour between 0 and 23
--volumedir         the directory where your backup volumes reside
--diffconstprefix   prefix given to your Differential or constant volumes
--collectfull   are Full volumes to be collected or not, boolean 1(y) or 0(n)
--fullprefix    prefix given to your Full volumes

--r_year    which year
--r_month   which month
--r_day     which day
--r_full    if not a day name a full directory - leave as default
--nodea     ip address in format 0.0.0.0
--nodeb     ip address in format 0.0.0.0
--nodec     ip address in format 0.0.0.0
--porta     int 
--portb     int
--portc     int
--user_acc  user account name, usually default set previously

    Bandwidth and capacity lookup table
    ===================================
    BW      Hours GB (Decimal)
    Mbit/s  1    2   3    4    5     6
    1       0.45 0.9 1.35 1.8  2.25  2.7
    10      4.5  9   13.5 18   22.5  27
    100     45   90  135  180  225   270
    1000    450  900 1350 1800 2250  2700

    Disk space lookup table
    =======================
    BW      Month   1xYr    2xYr
    Mbit/s
    1       20GiB   240GiB  480GiB
    10      67GiB   804GiB  9.6TiB
    100     542GiB  6.5TiB  78TiB
    1000    5.2TiB  62.4TiB 748.8TiB