Re: thin pool and discards

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Dne 30.9.2014 v 15:26 Vasiliy Tolstov napsal(a):
Hello. I'm try to check that discard are working. I have thin volume
1031 (used by virtual machine)
I'm fill the disc and delete data, (fs ext4 with discard option) after
that i manually run fstrim -v /
but data on thin volume not reclaimed.

   LV      VG   Attr       LSize   Pool Origin Data%  Move Log Cpy%Sync Convert
   tp0     vg0  twi-a-tz-- 445.00g               0.00
   373_153 vg1  Vwi---tz-k  20.00g tp1
   375_151 vg1  Vwi---tz-k  40.00g tp1
   529_217 vg1  Vwi---tz-k  40.00g tp1
   531_221 vg1  Vwi---tz-k  20.00g tp1
   533_219 vg1  Vwi---tz-k  40.00g tp1
   577_305 vg1  Vwi---tz-k  40.00g tp1
   581_309 vg1  Vwi---tz-k  40.00g tp1
   583_307 vg1  Vwi---tz-k  20.00g tp1
   tp1     vg1  twi-a-tz-- 445.00g               0.50
   377_159 vg2  Vwi---tz-k  20.00g tp2
   445_197 vg2  Vwi---tz-k  20.00g tp2
   tp2     vg2  twi-a-tz-- 445.00g               0.25
   1031    vg3  Vwi-aotz--  20.00g tp3          56.23
   tp3     vg3  twi-a-tz-- 445.00g               2.53
   tp4     vg4  twi-a-tz-- 445.00g               0.00
   111     vg5  Vwi-aotz--  20.00g tp5           5.63
   111_23  vg5  Vwi---tz-k  20.00g tp5  111
   111_71  vg5  Vwi---tz-k  20.00g tp5  111
   13      vg5  Vwi-aotz--  30.00g tp5           4.70
   17      vg5  Vwi-aotz--  20.00g tp5          25.58
   29      vg5  Vwi-a-tz--  20.00g tp5           0.00
   31      vg5  Vwi-a-tz--  20.00g tp5           0.00
   33      vg5  Vwi-a-tz--  20.00g tp5           0.00
   35      vg5  Vwi-a-tz--  20.00g tp5           0.00
   75      vg5  Vwi-aotz--  20.00g tp5          25.58
   tp5     vg5  twi-a-tz-- 445.00g               2.92

lvm - 2.02.106
kernel 3.10


Kernel 3.10 is too old,
Please repeat the test with at least 3.16


Zdenek

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