Hi,

This is the expected behavior, but not the desired behavior.

In case you are using DRBD Manage, DRBD Manage will get the feature
to skip the initial resync in case it deploys a DRBD resource on a
thinly provisioned volume. It is in development should be merged
on the master branch latest next week.

In case you are using plain DRBD, read on the drbdsetup man-page
how to skip the initial resync.

best regards,
 Phil

> Hi,
> 
> I'm using LVM thin as a back-end for DRBD. When initial sync was done the
> thin logical volume on secondary node shows 100% of data. Is this normal
> behavior?
> 
> Here is the output of lvs -a on primary node:
> 
> LV                          VG        Attr       LSize   Pool    Origin
> Data%  Meta%  Move Log Cpy%Sync Convert
> lv_data01                   vg_fsdata Vwi-aotz--  16.00t tp_data
> 45.99
> [lvol0_pmspare]             vg_fsdata ewi-------
> 2.50g
> tp_data                     vg_fsdata twi-aotz--  20.00t
> 36.81  4.76
> [tp_data_tdata]             vg_fsdata Twi-ao----
> 20.00t
> [tp_data_tmeta]             vg_fsdata ewi-ao----
> 10.00g
> 
> 
> Here is the output of lvs -a on secondary node:
> 
> LV              VG        Attr       LSize   Pool    Origin Data%  Meta%
> Move Log Cpy%Sync Convert
> lv_data01       vg_fsdata Vwi-aotz--  16.00t tp_data
> 100.00
> [lvol0_pmspare] vg_fsdata ewi-------
> 2.50g
> tp_data         vg_fsdata twi-aotz--  20.00t                80.00
> 10.31
> [tp_data_tdata] vg_fsdata Twi-ao----
> 20.00t
> [tp_data_tmeta] vg_fsdata ewi-ao----
> 10.00g

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