On 10-05-21 09:02 AM, Philipp Reisner wrote:
Hi,

This again is a call for all DRBD users, that have some testing equipment
available, and are ready to contribute a bit of their time to testing
DRBD.

  This is a release candidate, do not use it for production.
  This is a release candidate, do not package it for distributions.

The most outstanding change with this release is, that DRBD now
can use multiple BIOs (single IO requests) for processing a signle
data packat on the receiving side. This allows DRBD in many more
cases than before (on LVM's LVs) to process BIOs of a size of up
to 32k. (Before that DRBD, in many cases, forced the whole stack
down to a max BIO size of 4k).

This is important for hardware setups where both disk IO subsystem
and connecting network operate in the area of 10GBit/sec. Those become
rapidly more common.


8.3.8rc1 (api:88/proto:86-94)
--------
  * Do not expose failed local READs to upper layers, regression introduced
    in 8.3.3
  * Fixed support for devices with 4k hard sector size (again)
  * Fixed a potential Oops in the disconnect code
  * Fixed a race condition that could cause DRBD to consider the peers disk
    as Inconstent after resync instead of UpToDate (Bugz 271)
  * Fixed a reace condition that could cause DRBD to consider the peers disk
    as Outdated instead of Inconsistent during resync (Bugz 277)
  * Disallow to start a resync with invalidate / invalidate-remote when the
    source disk is not UpToDate
  * Forcing primary works now also for Consistent, not only for Outdated and
    Inconsistent (Bugz 266)
  * Improved robustness against corrupt or malicous sector addresses when
    receiving data
  * Added the initial-split-brain, it gets called also if the split-brain gets
    automatically resolved
  * Added the --assume-clean option for the resize command, it causes drbd to
    not resync the new storage after an online grow operation
  * drbdadm: Do not segfault if stacked-on-top-of refers to an undefined res
  * drbdadm: Do not consider configs with invalid after statements as invalid
  * drbdadm: Do not segfault if the peer's proxy section is missing
  * drbdadm: Allow nullglob in include statement
  * drbdadm: Fixed the use of waitpid
  * init script: fix insserv headers (Debian 576901)
  * Gave the receiving code the ability to use multiple BIOs for writing a
    single data packet; now DRBD works with BIOs up to 32kByte also on LVM
    devices; from now on the use_bmbv config option does nothing
  * New command check-resize, that allows DRBD to detect offline resizing
    and to move internal meta-data accordingly
  * Added a control loop, that allows DRBD to find auto tune the resync
    speed, on connections with large queues (drbd-proxy)
  * Create new current UUIDs late, after loosing connection to the peer
  * --dry-run option for connect; disconnects after sync handshake
  * --overwrite-data-of-peer got an alias named --force
  * Improvements to crm-fence-peer
  * Fixed option parsing and stacking in snapshot-resync-target-lvm.sh
  * Compiles on 2.6.33 and 2.6.34

http://git.drbd.org/?p=drbd-8.3.git;a=commit;h=drbd-8.3.8rc1
http://oss.linbit.com/drbd/8.3/drbd-8.3.8rc1.tar.gz

Happy testing!

-Phil

If a normal 1Gbit link is enough to test, and if you can give me an idea of what tests I could run to best test this, I'll be happy to load it up on my test cluster this weekend.

--
Digimer
E-Mail:         li...@alteeve.com
AN!Whitepapers: http://alteeve.com
Node Assassin:  http://nodeassassin.org
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