[lustre-discuss] Stripe Size for small file and OST query

Andreas Dilger adilger at whamcloud.com
Fri Mar 11 18:47:56 PST 2022

Yes, if you set a default stripe_count=2 then all file access will need to check 2 objects.

However, the PFL file layout avoids this problem, and allows setting different file layouts for different ranges of the file, which is very useful for small/medium/large files, hybrid flash/disk in the same file, etc.

See the Lustre Manual https://doc.lustre.org/lustre_manual.xhtml#pfl for details.

On Mar 11, 2022, at 06:13, Taner KARAGÖL via lustre-discuss <lustre-discuss at lists.lustre.org<mailto:lustre-discuss at lists.lustre.org>> wrote:


Hi folks;

I know It is better to set stripe_size=1 for small files. What if I set more than 2 or more. Does client query all OSTs even though small file sit on the one OST only?

Best Regards;


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Cheers, Andreas
Andreas Dilger
Lustre Principal Architect

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