[DRBD-user] Syncer question

Doug Lochart dlochart at gmail.com
Thu Feb 14 16:07:39 CET 2008

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


Forgive me if I am obviously too stupid to understand but I did read
that document and it did not help.  It makes no mention of the
parameters in question nor enough information for me to relate the
information in the document to drbd.conf file entries.

I can understand (not really) but I can accept not being offered a
high level and simplified explanation of my questions.  I do ask
however help on correlating the config file parameters in question to
the contents of the this  document.

To others I would accept a high level synopsis of what the parameters
affect and how to use them to tune my replication.  Armed with a high
level view I hope to be able to correlate them back to the technical
details on this document.

http://www.drbd.org/fileadmin/drbd/publications/drbd8.linux-conf.eu.2007.pdf

regards,

Douglas Lochart



On Thu, Feb 14, 2008 at 8:34 AM, Lars Ellenberg
<lars.ellenberg at linbit.com> wrote:
> On Wed, Feb 13, 2008 at 11:36:12AM -0500, Doug Lochart wrote:
>  > I am using DRBD to mirror a 1 terrabyte device.  I will be syncing
>  > over a gigabit switch so I assume I can use 100M to 150M as a rate
>  > safely.  There will be other traffic on the switch.  However I do not
>  > seem to understand how the al-extents parameter is used.  Most
>  > examples leave it set to 257 and that is good for an active set of 1
>  > Gig.  Could someone explain what the active set implies AND what are
>  > the pros/cons of increasing the active set size or do I need to woory
>  > about.
>
>  please read
>  http://www.drbd.org/fileadmin/drbd/publications/drbd8.linux-conf.eu.2007.pdf
>
>  --
>  : Lars Ellenberg                           http://www.linbit.com :
>  : DRBD/HA support and consulting             sales at linbit.com :
>  : LINBIT Information Technologies GmbH      Tel +43-1-8178292-0  :
>  : Vivenotgasse 48, A-1120 Vienna/Europe     Fax +43-1-8178292-82 :
>  __
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