Getting started with the I2BC cluster
Bonus objective
Checking your storage consumption and accessing backed up files.
Checking your quota
The I2BC has a custom command to quickly check how much space you’re using on their storage systems (i.e. how many files are in your name): i2bc_quota.
i2bc_quota [-u or -a] [-s {data,store}] [-v {WORK,USERS,EQUIPES,PLATEFORMES}] [/TEAM]
-u, --user query quota for current user
-a, --all query all quotas in volume
-s {data,store} NAS server to query
-v VOLUME volume to query for quota (WORK for data, USRS, EQUIPES or PLATEFORMES for store)
TEAM team name (e.g. SICS, BIOI2, AMIG, BIM, etc.)
For example, to display the quota of the whole (-a) SICS team (/SICS) in EQUIPES (-v EQUIPES) on store server (-s store), you would type:
i2bc_quota -a -s store -v EQUIPES /SICS
Accessing backups
Files on the I2BC’s storage system are regularly backed up. To access the previous versions from the cluster, you just have to check out the hidden .snapshots directory. Move first to the right directory, then:
john.doe@cluster-i2bc:/home/john.doe$ ls .snapshots
Jour_2024_03_18__12_00 Jour_2024_03_19__08_00 Mois_2024_01_21__03_00 Mois_2024_02_11__03_00 Mois_2024_03_03__03_00 rep_1710835203059 Semaine_2024_03_15__06_00 Semaine_2024_03_18__06_00
Jour_2024_03_18__16_00 Mois_2023_12_24__03_00 Mois_2024_01_28__03_00 Mois_2024_02_18__03_00 Mois_2024_03_10__03_00 Semaine_2024_03_13__06_00 Semaine_2024_03_16__06_00 Semaine_2024_03_19__06_00
Jour_2024_03_18__20_00 Mois_2024_01_07__03_00 Mois_2024_02_04__03_00 Mois_2024_02_25__03_00 Mois_2024_03_17__03_00 Semaine_2024_03_14__06_00 Semaine_2024_03_17__06_00
Folders are backed up at regular time intervals and accessible by navigating through the folders listed in .snapshots. The oldest snapshots are usually up to 3 months old. To recover a file, you can just copy it to your current working directory with the cp command. For example:
For example, I’ll delete a file (ohca.smig) that’s in my home directory since the 6th of March:
john.doe@cluster-i2bc:/home/john.doe$ ls -l
drwxrwxrwx 1 nobody 4294967294 412 22 févr. 11:48 MEMBERS
-rwxrwxrwx 1 john.doe tous 5758246912 6 mars 13:31 ohca.smig
john.doe@cluster-i2bc:/home/john.doe$ rm ohca.smig
john.doe@cluster-i2bc:/home/john.doe$ ls -l
drwxrwxrwx 1 nobody 4294967294 412 22 févr. 11:48 MEMBERS
Then I’ll get it back from today’s snapshot in .snapshots:
john.doe@cluster-i2bc:/home/john.doe$ ls -l .snapshots/Jour_2024_03_18__12_00/
drwxrwxrwx 1 nobody 4294967294 412 22 févr. 11:48 MEMBERS
-rwxrwxrwx 1 john.doe tous 5758246912 6 mars 13:31 ohca.smig
john.doe@cluster-i2bc:/home/john.doe$ cp -p .snapshots/Jour_2024_03_18__12_00/ohca.smig .
john.doe@cluster-i2bc:/home/john.doe$ ls -l
drwxrwxrwx 1 nobody 4294967294 412 22 févr. 11:48 MEMBERS
-rwxrwxrwx 1 john.doe tous 5758246912 6 mars 13:31 ohca.smig
Take home message
1) i2bc_quota command to get information on your storage usage
2) .snapshots is a hidden folder accessible anywhere on backed up systems to retrieve older versions of files/folders