Resizing filesystem on RBD without unmount/mount cycle

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Maybe I’m missing something obvious here.  Or maybe this is the way it has to be.  I haven’t found an answer via Google.

 

I’m experimenting with ceph 0.61.4 and RBD under Ubuntu 13.0x.  I create a RADOS block device (test), map it, format it as ext4 or xfs, and mount it.  No problem.  I grow the underlying RBD.  lsblk on both /dev/rbd/rbd/test and /dev/rbd1 shows the new size, but the filesystem resize commands don’t see the new size until I unmount and then mount the block device again.  “-o remount” isn’t good enough, nor is partprobe.

 

Is there a way to club the filesystem tools into recognizing that the RBD has changed sizes without unmounting the filesystem?

 

-----

Edward Huyer

School of Interactive Games and Media

Golisano 70-2373

152 Lomb Memorial Drive

Rochester, NY 14623

585-475-6651

erhvks@xxxxxxx

 

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