Change to Default Stripe Count on Lustre Filesystems

22 Jun, 2017

The default stripe count has been changed from 1 to 4 on all Pleiades Lustre filesystems.

This change will improve read/write performance for most file access methods, and balance the load across the available servers. It will also mitigate the effect of a large default-striped file filling up a single object storage target (OST).

No user action is required. However, please be aware of the following:

If you create a directory that you expect to hold around 100,000 or more small files, you should consider changing the striping for that directory to 1 before you create the files. Use the lfs setstripe command to change the striping.
You should still consider your file sizes and access patterns, and adjust stripe count accordingly. See Lustre Basics and Lustre Best Practices for specific information and examples.

If you have any questions or concerns, please contact NAS User Services at (800) 331-8737, (650) 604-4444, or support@nas.nasa.gov.

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Change to Default Stripe Count on Lustre Filesystems

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