[Users] ZFS vs ploop

[Jean-Marc Pigeon]

On 07/22/2015 01:08 PM, Gena Makhomed wrote:

> 
> My experience with ploop:
> 
> DISKSPACE limited to 256 GiB, real data used inside container
> was near 40-50% of limit 256 GiB, but ploop image is lot bigger,
> it use near 256 GiB of space at hardware node. Overhead ~ 50-60%
> 
> I found workaround for this: run "/usr/sbin/vzctl compact $CT"
> via cron every night, and now ploop image has less overhead.
> 
> current state:
> 
> on hardware node:
> 
> # du -b /vz/private/155/root.hdd
> 205963399961    /vz/private/155/root.hdd
> 
> inside container:
> 
> # df -B1
> Filesystem               1B-blocks          Used    Available Use%
> Mounted on
> /dev/ploop38149p1     270426705920  163129053184  94928560128  64% /
> 

Suprised about 256GiB limitation, (ext4+Ploop)
on my side (one of many container)
#ls -lh
total 461G
-rw-r--r-- 1 root root  796 Jul 22 13:45 DiskDescriptor.xml
-rw------- 1 root root    0 Dec 29  2014 DiskDescriptor.xml.lck
-rw------- 1 root root 461G Jul 19 04:56 root.hdd

From inside the container
#df -h
filesystem           1K-blocks      Used Available Use% Mounted on
/dev/ploop21016p1     493G          382G   86G  82% /

So I am above 265GiB limit, what am I missing?


I agree with Kir, seen a huge difference in performance
going from simfs to ploop.
Same activity, HOST load was skyrocketing easily above mark 20,
while now load is kept within mark 5.

I was reluctant to move to ploop at first, moved away
from simfs January 2015, no regret at all.

Many thanks for all Kir.




-- 

A bientôt
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Jean-Marc Pigeon                        E-Mail: jmp at safe.ca
SAFE Inc.                             Phone: (514) 493-4280
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