This version (2024/10/24 10:28) is a draft.
Approvals: 0/1The Previously approved version (2023/06/26 08:06) is available.Diff

Storage infrastructure

Storage targets

  • Several Storage Targets available
    • $HOME
    • $TMPDIR
    • $BINFS
    • $BINFL
    • $DATA
  • For different purposes
    • Random I/O
    • Small Files
    • Huge Files / Streaming Data

The HOME Filesystem (VSC-4)

  • Use for software and job scripts
  • Default quota: 100GB
  • Accessible with the $HOME environment variable (VSC-4)
    • /home/fs70XXX/username
  • Also available on VSC-3
    • /gpfs/home/fs70XXX/username
  • Check quota
mmlsquota --block-size auto -j home_fs70XXX home
VSC-4 > mmlsquota --block-size auto -j home_fs70824 home
                         Block Limits                                    |     File Limits
Filesystem type         blocks      quota      limit   in_doubt    grace |    files   quota    limit in_doubt
home       FILESET       63.7M       100G       100G          0     none |     3822 1000000  1000000        0

The TMP filesystem

  • Use for
    • Random I/O
    • Many small files
  • Size is up to 50% of main memory
  • Data gets deleted after the job
    • Write Results to $HOME or $GLOBAL
  • Disadvantages
    • Space is consumed from main memory <html><!–* Alternatively the mmap() system call can be used
  • Keep in mind, that mmap() uses lazy loading
  • Very small files waste main memory (memory mapped files are aligned to page-size)–></html>
  • Accessible with the $TMPDIR environment variable

The DATA Filesystem

  • Use for all kind of I/O
  • Default quota: 10TB
    • Extansion can be requested
  • Accessible with the $DATA environment variable
    • /gpfs/data/fs70XXX/username
  • Check quota
mmlsquota --block-size auto -j data_fs70XXX data
VSC-4 > mmlsquota --block-size auto -j data_fs70824 data
                         Block Limits                                    |     File Limits
Filesystem type         blocks      quota      limit   in_doubt    grace |    files   quota    limit in_doubt 
data       FILESET           0     9.766T     9.766T          0     none |       14 1000000  1000000        0

Backup policy

  • Backup of user files is solely the responsibility of each user
  • Backed up filesystems:
    • $HOME (VSC-4)
    • $DATA (VSC-4)
  • Backups are performed on best effort basis
    • Full backup run: ~3 days
  • Backups are used for disaster recovery only
  • Project manager can exclude $DATA filesystem from backup
  • doku/storage.txt
  • Last modified: 2024/10/24 10:28
  • by 127.0.0.1