Disk Table

Intro

This is the fractale site documentation (may 2017).

Local Hard Disk on 3 main computers 

MMU (ram 16 Gb, 64 bits, bogo 5186)

	/dev/???	Ubuntu boot	Status
SSD128	sda1	/ (boot)
	sda3	(swap)
1TB	sdb1	/media/Server	NFS shared
SSD256	sdc	/media/Shared	NFS shared
SSD512	-	/media/Public	NFS shared

MMM (ram 16 Gb, 64 bits, bogo 6815)

	/dev/???	Ubuntu boot	Debian boot	Status
SSD500	sda2	/media/debianBoot	/ (boot)
	sda3	(swap)	?
1TB	sdb1	/ (boot)	?
	sdb2	/home.old	?
SSD250	sdc1	/home.replica	?
	sdc2	/home	/home
2TB	sdd1	/media/pge/HOMEDISK	?	suspect?

MMW (ram 4 Gb, 32 bits, bogo 6184)

	/dev/???	Ubuntu boot	Status
320 Gb	sda1	/ (boot)
	sda5	(swap)

Network

Network disks

	host	mount	Size (Gb)	Critical content
Server	MMU	/media/Server	940	alex alex.resources jalbum TEDscan.pdf
Shared	MMU	/media/Shared	240	dse gws.backup repo.fossil server.geo ted webApp
Public	MMU	/media/Public	500	(many)
Shared	MMA	/media/Shared.A	110	(none)
WD	WD	/media/WD	1870	(replicas of all others)
SS2	SS2	/media/SS2	280	gws.backup MATSCAPE SAPIENS

Critical replicas on WD:

• MMM : /home/pge
• /media/Server/*
• /media/Shared/*
• /media/Public/*

Critical replicas on USB keys:

Network mount

source	host	mount
/home/pge	MMA	/media/MMA
/home/pge	MMM	/media/MMM
/home/pge	MMU	/media/MMU
/home/pge	MMW	/media/MMW
/var/www	MMA	/media/var.www.MMA
/var/www	MMU	/media/var.www.MMU
/var/www	MMW	/media/var.www.MMW

Backup / Replication Policy

Three tools (bash scripts) are used

• BlackBackup
• BlackReplic
• wikiBakRes 

BlackBackup

BlackBackup is used to save a copy of all files of the current directory into a jar.

This jar is replicated in various places (all available directories named 'BlackBackup'). For instance:

• /media/pge/BlackDisk/BlackBackup/
• /media/WD/BlackDisk/BlackBackup/
• /media/WE/BlackDisk/BlackBackup/

It is used interactively (on demand) only.

BlackReplic

The BlackReplic -a process runs on MMU, MMM, MMW (not on MMA) every day using cron scheduling.

The files are replicated in various places, all being directories with name 'BlackReplic'. For instance:

• /media/pge/BlackDisk/BlackReplic/
• /media/Public/BlackReplic/
• /media/SS2/BlackReplic/

When the files are under /home/pge, they are also replicated from MMM (original) to MMU, MMW and MMA.

The BlackReplic script itself contains the list of the vital directories to be replicated.

wikiBakRes

This script is used only to backup and restore the wiki data sets.

It is used trough cron schedule (as root)

• on MMA (backup run)
• on MMU (restore (run)
• on MMW (restore run)

The original data is on MMA only.

The files are saved in directories named gws.backup. They are present :

• on MMU
• on WD