[lustre-discuss] What happens if my data to be written is lesser than the stripe size

Ben Evans bevans at cray.com
Thu Jul 23 06:44:49 PDT 2015


If you have a stripe spanning multiple OSTs, it will allocate objects on each OST.  Until you write data to them, they will be empty.

In your example, only 100KB of data will be written to disk.

From: lustre-discuss [mailto:lustre-discuss-bounces at lists.lustre.org] On Behalf Of Prakrati.Agrawal at shell.com
Sent: Thursday, July 23, 2015 2:25 AM
To: lustre-discuss at lists.lustre.org
Subject: [lustre-discuss] What happens if my data to be written is lesser than the stripe size

Hi,

If I have a file of say 100KB and my stripe size is set to 1MB, how does Lustre write it to the OST?
Does it pad the file to make it of 1MB or just writes 100KB of file?
Please explain.

Thanks,
Prakrati
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