[Drbd-dev] resync end in drbd8

[Drbd-dev] resync end in drbd8

[Cristian Zamfir]

Hi,

I am using the svn version of drbd8 and the -m option to allow both 
peers to be primary. The states are Connected and UpToDate/UpTodate.
I am going bursts of writes to one of the disks and I am interested in 
finding out when there are no outstanding writes that need to be 
mirrored to the other disk, basically when the resync ends.
What can I use to achieve this? Is there a flag that I can read from 
userspace when the drives are in sync? Or maybe it is already somewhere 
in /proc/drbd and I don't see it.

Thank you.

Cristian

Re: [Drbd-dev] resync end in drbd8

[Lars Ellenberg]

/ 2006-12-13 19:41:07 +0000
\ Cristian Zamfir:
> 
> Hi,
> 
> I am using the svn version of drbd8 and the -m option to allow both
> peers to be primary. The states are Connected and UpToDate/UpTodate.
> I am going bursts of writes to one of the disks and I am interested in
> finding out when there are no outstanding writes that need to be
> mirrored to the other disk, basically when the resync ends.

there is no "delayed" resync.
DRBD Protocol C is synchonous
(required for two Primaries).

when the write (fsync, fdatasync) comes back,
the data is on both disks.

if you don't fsync or at least fdatasync,
even without drbd you won't know when data is on the local disk.

these kinds of questions are better posted on drbd-user, btw.

-- 
: Lars Ellenberg                            Tel +43-1-8178292-55 :
: LINBIT Information Technologies GmbH      Fax +43-1-8178292-82 :
: Vivenotgasse 48, A-1120 Vienna/Europe    http://www.linbit.com :