EXT4 Seeing Work To Speed Up Mount Times For Large File-Systems
Written by Michael Larabel in Linux Storage on 10 May 2020 at 06:44 AM EDT. 25 Comments
LINUX STORAGE --
Patches are pending that can sharply speed-up mount times of large EXT4 file-systems.

A Phoronix reader pointed us to the work this weekend on improving bitmap loading and skip non-loaded groups at cr=0/1.

The notable bit is this: "using sparse image and dm-slow virtual device of 120TB was simulated. then the image was formatted and filled using debugfs to mark ~85% of available space as busy. mount process w/o the patch couldn't complete in half an hour (according to vmstat it would take ~10-11 hours). with the patch applied mount took ~20 seconds."

So while numbers on an extreme case, this work can allow for much quicker mount times of large EXT4 file-systems.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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