<div dir="ltr">Check the section in DRBD user guide, "4.1.8. Skipping initial resynchronization". I think that's what you are looking for, assuming that there's no need to preserve the data on existing volumes (i.e you start with blank LVM volumes).<br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, 24 Oct 2021 at 11:55, Pierre-Philipp Braun <<a href="mailto:pbraun@nethence.com">pbraun@nethence.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Hello<br>
<br>
when performing the initial synchronization of an thin-provisioned LVM2 <br>
volume from primary to secondary, I can see data gets written on <br>
secondary and the resulting LVM2 volume, although supposedly "thin", <br>
ends up with 100% used data.<br>
<br>
To fix that, I need to `blkdiscard` it (even from the primary, that <br>
works too) after synchronization. And this is an extraordinary painful <br>
step to go through. Because of that limitation, I cannot create many <br>
drbd resources that would over-commit physically available space at <br>
once: I need to sync/discard the resources step by step...<br>
<br>
Is there a way to make the initial replication keep being thin (or <br>
sparse, as in file-system terminology, when dealing with zeroes)?<br>
<br>
Thank you!<br>
<br>
Best regards,<br>
-- <br>
Pierre-Philipp Braun<br>
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