[DRBD-user] What is drbdadm apply-al ?

Lionel Sausin ls at numerigraphe.com
Mon Oct 14 13:32:41 CEST 2013

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

Dear DRBD users and developpers,

The instructions[1] for downgrading from 8.4 to 8.3 state that we should 
do :
     drbdadm apply-al all
But the man page[2] does not document "apply-al".
Would someone please explain what "apply-al" does (ie: why does the AL 
need to be "applied" ) ?

Also, is it advisable to "apply-al all" when we remove DRBD too ? (for 
example, if we want to keep the data on one node).

[1] http://www.drbd.org/users-guide/s-downgrading-drbd84.html
[2] http://www.drbd.org/users-guide/re-drbdadm.html

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