[linux-lvm] lvconvert alloc policy

[linux-lvm] lvconvert alloc policy

[Levy Abinajm Melero Sant'Anna]

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Hi all,
I don't understand why I can't mirror this LV

root@atom:~# pvs
  PV         VG       Fmt  Attr PSize   PFree
  /dev/sda5  backvg   lvm2 a-   186,26G 316,00M
  /dev/sdb1  archvg   lvm2 a-   465,76G 465,76G
  /dev/sdc3  onlinevg lvm2 a-   315,62G 310,18G
  /dev/sdc4  archvg   lvm2 a-   381,48G 632,00M

root@atom:~# lvs
  LV        VG       Attr   LSize   Origin Snap%  Move Log Copy%
  onhomelv  archvg   -wi-a- 380,86G
  arcsnaplv backvg   sri-a-   2,00G backlv  48,00
  backlv    backvg   owi-a- 164,00G
  homelv    backvg   -wi-ao  12,00G
  usrlv     backvg   -wi-ao   7,95G
  drooton   onlinevg -wi-a-   1,00G
  dusron    onlinevg -wi-a-   2,45G
  dvaron    onlinevg -wi-a-   1,00G
  swaplv    onlinevg -wi-a-   1,00G

root@atom:~# vgs
  VG       #PV #LV #SN Attr   VSize   VFree
  archvg     2   1   0 wz--n- 847,23G 466,38G
  backvg     1   3   1 wz--n- 186,26G 316,00M
  onlinevg   1   4   0 wz--n- 315,62G 310,18G

root@atom:~# lvconvert -v -m 1 /dev/archvg/onhomelv /dev/sdb1
    Checking for existing volume group "archvg"
    Archiving volume group "archvg" metadata (seqno 6).
  Not enough PVs with free space available for parallel allocation.
  Consider --alloc anywhere if desperate.

All help will be nice,
-- 
Lewis/Iceman/Levy

Google Talk! levy.santanna@gmail.com
ICQ 12913566
MSN levy.santanna@gmail.com
Meebo lewisgodus

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Re: [linux-lvm] lvconvert alloc policy

[Bryn M. Reeves]

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Levy Abinajm Melero Sant'Anna wrote:
> root@atom:~# lvconvert -v -m 1 /dev/archvg/onhomelv /dev/sdb1
>     Checking for existing volume group "archvg"
>     Archiving volume group "archvg" metadata (seqno 6).
>   Not enough PVs with free space available for parallel allocation.
>   Consider --alloc anywhere if desperate.

Your archvg has two PVs. When you specify -m1 you create a two-sided
mirror with an on-disk persistent log. The log requires a 3rd PV
(although only a very small amount of space on it).

Regards,
Bryn.
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