Re: NILFS2 under stress

[Ivan Shmakov <oneingray-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

>>>>> Zavi Zavi writes:

 > I've been experimenting with NILFS2 on a 8GB USB stick.  I repeatedly
 > created and deleted a 128MB file. After about 60 attempts, the disk
 > got 100% full, and would not respond anymore.

	I've tried to install a Debian Wheezy instance onto an 8 GiB
	logical volume via debootstrap(8) from Debian Squeeze (Linux
	2.6.32-5-amd64, nilfs-tools 2.0.18-2) and have witnessed pretty
	much the same behavior.

 > So I tried repeating this setup after changing the GC settings to be
 > much more agressive GC policy

 > protection_period       0

[…]

	I've restarted nilfs_cleanerd(8) with the protection period set
	to only 60 seconds (see below; the rest of the configuration is
	as per the Debian defaults), and the free space began to rise,
	albeit somewhat slowly (around a few MiB's per second), until it
	reached 1.7 GiB, when it's stopped.

	(I guess that it's quite normal, though I'm yet to become
	familiar with NILFS2.)

# nilfs_cleanerd -p 60 \
      /dev/mapper/vgXXX-host--2012--06--17.chroot \
      /srv/chroot/2012-06-17 

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