[DRBD-user] Re: [DRBD-announce] drbd-8.0_pre1.tar.gz

mike mike503 at gmail.com
Tue Mar 14 12:55:15 CET 2006

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

Wow - this is awesome!

Especially the active/active support.

Will there be the option (which may or may not be needed with
active/active) for some sort of commands to be spawned (much like the
"incon-degr-cmd") but for other events? Such as peer node
disconnection? I have a script that will run "drbddisk foo start" and
do the appropriate tweaks for NFS to run properly on the freshly
mounted/now primary DRBD mount... but currently in today's DRBD
(version info below) there is no option for that.

Version: 0.7.14 (api:77)
SVN Revision: 1989 build by buildcentos at x8664-build, 2005-10-27 20:17:20

Having active/active I believe would fix my issues, as I wouldn't have
to run the drbddisk command to mount /dev/drbd0 and drbdadm primary
all and such...

On 3/14/06, Philipp Reisner <philipp.reisner at linbit.com> wrote:
> Hi there,
> Finally the time has come to bring the DRBDv8 development code to
> a broader audience. Here is the ChangeLog that outlines most improvements:
> 8.0-pre1 (api:80/proto:80)
> --------
>  * Removed support for Linux-2.4.x
>  * Cleanup of the wire protocol.
>  * Added optional peer authentication with a shared secret.
>  * Consolidated state changes into a central function.
>  * Improved, tunable after-split-brain recovery strategies.
>  * Always verify all IDs used in the protocol that are used as pointers.
>  * Introduced the "outdate" disk state, and commands for managing it.
>  * Introduced the "drbdmeta" command, and require the user to create
>    meta-data explicitly.
>  * Support for primary/primary (for OCFS2, GFS...)
>  * Replaced the sync-groups with the sync-after mechanism.
>  * The "common" section in the configuration file.
>  * Replaced the generation counters (GCs) with data-generation-UUIDs
>  * Improved performance by using Linux-2.6's BIOs with up to 32k per
>    IO request. Before we transferred only up to 4k per IO request.
>  * A Warning if the disk sizes are more than 10% different.
>  * A connection teardown packet to differentiate between a crash
>    of the peer and a peer that is shut down gracefully.
>  * External imposable SyncPause states, to serialize DRBD's resynchronisation
>    with the resynchronisation of backing storage's RAID configurations.
>  * Backing storage can be hot added to disk less nodes.
>  * Prepared for advanced integration to Heartbeat-2.0
>  * Changed internal APIs so that missed writes of the meta-data super
>    block are reported as they happen.
>  * The http://usage.drbd.org sub project.
>  * Rewrote the scanner/parser of drbd.conf. 10 times smaller/faster and
>    easier to maintain.
>  * Asynchronous meta-data IO [ Code drop from the DRBD+ branch ]
> Of course there is no documentation for DRBDv8 yet, nor it is feature
> complete. But the still outstanding features are only minor changes.
> So it is time for you to start testing this code on your testing
> and staging clusters.
> Please do:
>  * stress tests
>     IO pressure, memory pressure etc...
>  * coverage tests
>     Try to test all possible failure and recovery scenarios.
>  * Performance comparison tests between drbd-0.7.x and drbd-8.0.x
>  * Put OCFS2 / GFS on top of it (still untested from my side)
> Please send _usefull_ reports to drbd-dev at lists.linbit.com . Please note
> that that list is moderated, and we try to keep the traffic there
> quite low.
> Send random observations regarding DRBD-8 to drbd-user at lists.linbit.com
> http://oss.linbit.com/drbd/8.0/drbd-8.0_pre1.tar.gz
> http://svn.drbd.org/drbd/tags/drbd-8.0_pre1/
> Thanks!
> -Philipp
> --
> : Dipl-Ing Philipp Reisner                      Tel +43-1-8178292-50 :
> : LINBIT Information Technologies GmbH          Fax +43-1-8178292-82 :
> : Schönbrunnerstr 244, 1120 Vienna, Austria    http://www.linbit.com :
> _______________________________________________
> drbd-announce mailing list
> drbd-announce at lists.linbit.com
> http://lists.linbit.com/mailman/listinfo/drbd-announce

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