Deprecated: please see new documentation site.


Contents


Home Directory

Mount point: /home/username

Users have a quota of 500MB for their home directory. If a user exceeds this limit he will begin receiving error messages when he tries to use more disk space. Once he exceed 550MB all operations that would result in allocating more disk space in his home directory will fail.

Work Directory

Mount point: /work/default/username

Individual users have a quota of 20GB total within this filesystem.

Temporary Overflow Work Space - Bluedawg Only

In response to the lack of space in the NFS filesystem mounted at /work/nfs101/ on Bluedawg, additional disk has been made available on that cluster. You can access this disk via the path /work/nfs102/ or using the canonical name /mnt/lpfs.nfs102/.

This disk is larger than that offered by the original work disk and the per-user quota has been increased to reflect this. Users can now write up to 50GB of data to this disk, compared to the 20GB available on the original filesystem.

As with the other work filesystem, the given quotas represent an overcommittment of the disk. This decision allows jobs generating large datasets to run on this hardware. However, given this fact, please treat this filesystem as a temporary resource meant to store data for the running of jobs only. Your fellow users will appreciate it. This request also pertains to all other LONI cluster filesystems.

Local Scratch

Mount point: /scratch

Every cluster has local scratch space on each node that may be used to temporarily store files during the execution of a job. The amount of space within the /scratch filesystem varies from node to node (depending on the total amount of disk space available).

Note: After writing to /scratch, files you write there will be deleted after your job completes.

Checking One's Quota

Issuing the following command,

# quota -v

results in output similar to:

Filesystem      blocks    quota    limit  grace  files   quota   limit  grace
/mnt/home        77832   500000   550000          1111    5000    5500         
/mnt/work.nfs101 75884 20000000 20500000           222  900000 1000000

This will tell one how close he is to the limit.

Notes on Number of Files in a Directory

All users should limit the number of files that they store in a single directory to < 1000. Large numbers of files stored within a single directory can severly degrade performance, negatively impacting the experience of all individuals using that filesystem.


Users may direct questions to sys-help@loni.org.

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