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drbd-8.4.1.tar.gz

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philipp.reisner at linbit

Dec 20, 2011, 6:37 AM

Post #1 of 4 (274 views)
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drbd-8.4.1.tar.gz

Hi fellows,

Once again I am proud to announce a new release: 8.4.1

I hope that we have the majority of regressions that where
introduced with the 8.4 effort identified and fixed now.

The bug described by the first item of the changelog can only trigger
if you use multiple volumes.

I advise every user of 8.4.0 to upgrade to 8.4.1, due to the possible
kernel OOPS (second item on the change log).

New features

* Read load balancing.
That might be of interest if you have a faster network between
your DRBD nodes in place, and want to benefit of the secondary's
IO bandwidth for reading.

* Works with Linux-3.2
It was actually tested with Linux-3.2-rc6, but since the merge
window closed long time ago, there is hope that it will also work
with the final Linux-3.2.

8.4.1 (api:genl1/proto:86-100)
--------
* Fixed a bug that might cause in kernel list corruption triggered by
simultaneous IO on multiple volumes in a single resource
* Fixed a bug that might cause a kernel OOPS in the worker thread while
the receiver tied to establish a connection (drbd-8.4.0 regression)
* Fixed an issue in the receiver that could cause connection triggered by
simultaneous IO on multiple volumes in a single resource
* Consider the discard-my-data flag for all volumes
* Fixed attaching to backing devices that do not support barriers/flushes,
when barriers/flushes are not disabled by the configuration.
(drbd-8.4.0 regression)
* Fixed a rare compatibility issue with DRBD's older than 8.3.7
when negotiating the bio_size
* Fixed a rare race condition where an empty resync could stall with
if pause/unpause events happen in parallel
* Made the re-establishing of connections quicker, if it got a broken pipe
once. Previously there was a bug in the code caused it to waste the first
successful established connection after a broken pipe event.
* crm-fence-peer.sh: Can now deal with multiple DRBD instances being in
a master/slave group
* Optional load balancing for read requests: new keyword "read-balance"

http://oss.linbit.com/drbd/8.4/drbd-8.4.1.tar.gz
http://git.drbd.org/?p=drbd-8.4.git;a=tag;h=drbd-8.4.1
http://www.linbit.com/support/drbd-8.4.1/

Best,
Phil
--
: Dipl-Ing Philipp Reisner
: LINBIT | Your Way to High Availability
: Tel: +43-1-8178292-50, Fax: +43-1-8178292-82
: http://www.linbit.com

DRBD(R) and LINBIT(R) are registered trademarks of LINBIT, Austria.

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linux at alteeve

Dec 20, 2011, 7:51 AM

Post #2 of 4 (263 views)
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Re: drbd-8.4.1.tar.gz [In reply to]

On 12/20/2011 09:37 AM, Philipp Reisner wrote:
> Hi fellows,
>
> Once again I am proud to announce a new release: 8.4.1
>
> I hope that we have the majority of regressions that where
> introduced with the 8.4 effort identified and fixed now.
>
> The bug described by the first item of the changelog can only trigger
> if you use multiple volumes.
>
> I advise every user of 8.4.0 to upgrade to 8.4.1, due to the possible
> kernel OOPS (second item on the change log).
>
> New features
>
> * Read load balancing.
> That might be of interest if you have a faster network between
> your DRBD nodes in place, and want to benefit of the secondary's
> IO bandwidth for reading.
>
> * Works with Linux-3.2
> It was actually tested with Linux-3.2-rc6, but since the merge
> window closed long time ago, there is hope that it will also work
> with the final Linux-3.2.
>
>
> 8.4.1 (api:genl1/proto:86-100)
> --------
> * Fixed a bug that might cause in kernel list corruption triggered by
> simultaneous IO on multiple volumes in a single resource
> * Fixed a bug that might cause a kernel OOPS in the worker thread while
> the receiver tied to establish a connection (drbd-8.4.0 regression)
> * Fixed an issue in the receiver that could cause connection triggered by
> simultaneous IO on multiple volumes in a single resource
> * Consider the discard-my-data flag for all volumes
> * Fixed attaching to backing devices that do not support barriers/flushes,
> when barriers/flushes are not disabled by the configuration.
> (drbd-8.4.0 regression)
> * Fixed a rare compatibility issue with DRBD's older than 8.3.7
> when negotiating the bio_size
> * Fixed a rare race condition where an empty resync could stall with
> if pause/unpause events happen in parallel
> * Made the re-establishing of connections quicker, if it got a broken pipe
> once. Previously there was a bug in the code caused it to waste the first
> successful established connection after a broken pipe event.
> * crm-fence-peer.sh: Can now deal with multiple DRBD instances being in
> a master/slave group
> * Optional load balancing for read requests: new keyword "read-balance"
>
> http://oss.linbit.com/drbd/8.4/drbd-8.4.1.tar.gz
> http://git.drbd.org/?p=drbd-8.4.git;a=tag;h=drbd-8.4.1
> http://www.linbit.com/support/drbd-8.4.1/
>
> Best,
> Phil

Congrats, folks!

--
Digimer
E-Mail: digimer [at] alteeve
Freenode handle: digimer
Papers and Projects: http://alteeve.com
Node Assassin: http://nodeassassin.org
"omg my singularity battery is dead again.
stupid hawking radiation." - epitron
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lvml at 5t9

Dec 27, 2011, 12:45 PM

Post #3 of 4 (219 views)
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Re: [DRBD-announce] drbd-8.4.1.tar.gz [In reply to]

On 12/20/2011 03:37 PM, Philipp Reisner wrote:
> Once again I am proud to announce a new release: 8.4.1

> New features
> * Read load balancing.
> That might be of interest if you have a faster network between
> your DRBD nodes in place, and want to benefit of the secondary's
> IO bandwidth for reading.

That sounds nice for one of our DRBD clusters, where there's
a dedicated, short 10GBit/s connection, but rather slow magnetic
disks on both ends.

> * Optional load balancing for read requests: new keyword "read-balance"

Alas, I couldn't find way to enable this.

> tar xOzf drbd-8.4.1.tar.gz | grep "read-balance"
yields just the one line from the ChangeLog:
> * Optional load balancing for read requests: new keyword "read-balance"

... so I wonder, is this really implemented?

> * Works with Linux-3.2

I'm currently running 3.1.6, I hope this is also still supported.

Regards,

Lutz Vieweg

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andreas.kurz at gmail

Dec 27, 2011, 2:26 PM

Post #4 of 4 (224 views)
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Re: [DRBD-announce] drbd-8.4.1.tar.gz [In reply to]

On 12/27/2011 09:45 PM, Lutz Vieweg wrote:
> On 12/20/2011 03:37 PM, Philipp Reisner wrote:
>> Once again I am proud to announce a new release: 8.4.1
>
>> New features
>> * Read load balancing.
>> That might be of interest if you have a faster network between
>> your DRBD nodes in place, and want to benefit of the secondary's
>> IO bandwidth for reading.
>
> That sounds nice for one of our DRBD clusters, where there's
> a dedicated, short 10GBit/s connection, but rather slow magnetic
> disks on both ends.
>
>> * Optional load balancing for read requests: new keyword "read-balance"

should be: "read-balancing" ....

Regards,
Andreas

--
Need help with your HA-cluster?
http://www.hastexo.com/now

>
> Alas, I couldn't find way to enable this.
>
>> tar xOzf drbd-8.4.1.tar.gz | grep "read-balance"
> yields just the one line from the ChangeLog:
>> * Optional load balancing for read requests: new keyword "read-balance"
>
> ... so I wonder, is this really implemented?
>
>> * Works with Linux-3.2
>
> I'm currently running 3.1.6, I hope this is also still supported.
>
> Regards,
>
> Lutz Vieweg
>
>
> _______________________________________________
> drbd-user mailing list
> drbd-user [at] lists
> http://lists.linbit.com/mailman/listinfo/drbd-user
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