Recommend a stripe count of 32 for large files #300
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Recommend 32 instead of unlimited (-1; in practice ~160 on capstor, i.e. the number of OSTs) for large files.
Thanks to @mpasserini for the recommendation. This also the default stripe count amazon uses (https://docs.aws.amazon.com/fsx/latest/LustreGuide/performance.html#striping-pfl). NERSC recommend against using too many OSTs as well, but just say not to use more than 128 (https://docs.nersc.gov/performance/io/lustre/). NASA doesn't explicitly recommend a number, but uses 32 in their example (https://www.nas.nasa.gov/hecc/support/kb/lustre-progressive-file-layout-(pfl)-with-ssd-and-hdd-pools_680.html).