Mailing List Archive: DRBD: Users

DRBD User's Guide 1.3.0

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florian.haas at linbit

Oct 15, 2009, 3:42 AM

Post #1 of 4 (841 views)
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DRBD User's Guide 1.3.0

Hello everyone,

I have released and uploaded the DRBD User's Guide 1.3.0. Thanks to
everyone who provided feedback and corrected errors!

A few notable changes since the 1.2.0 release 2 months ago:

- Lots of stuff about Pacemaker integration. Note in particular the new
sections about 4-way redundancy with stacked DRBD, and about floating peers:

http://www.drbd.org/users-guide/s-pacemaker-stacked-resources.html#s-pacemaker-stacked-4way
http://www.drbd.org/users-guide/s-pacemaker-floating-peers.html

- Three new chapters (15, 16, and 17) on optimizing DRBD performance. As
usual, please be advised that performance tuning is not an exact
science, so your mileage may vary when applying these recommendations:

http://www.drbd.org/users-guide/p-performance.html

This also marks the effective end of the DRBD User's Guide Extended
Edition, which used to be available to LINBIT's customers. The Extended
Edition is being superseded in its role by the DRBD Documentation
Library, comprising the User's Guide and a number of advanced technical
guides containing very in-depth information about utilizing DRBD in a
number of high availability use cases.

Those who have contacted us and have been patiently waiting for PDF
versions of the public User's Guide, thanks a lot for your cooperation.
You will receive your PDFs this afternoon. If you want a PDF and haven't
received one yet, drop us a line at http://www.linbit.com/en/contact and
we'll get back to you. Thanks!

Cheers,
Florian

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herve.gautier at thalesgroup

Oct 15, 2009, 6:37 AM

Post #2 of 4 (771 views)
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Re: DRBD User's Guide 1.3.0 [In reply to]

Hi Florian,

Tell me if I am wrong, but, in my opinion, there is still missing a disk
state which is not listed in the User Guide:
Unconfigured, when disk is disconnected & detached.

My 2 cents.

Hervé.

Florian Haas a écrit :
> Hello everyone,
>
> I have released and uploaded the DRBD User's Guide 1.3.0. Thanks to
> everyone who provided feedback and corrected errors!
>
> A few notable changes since the 1.2.0 release 2 months ago:
>
> - Lots of stuff about Pacemaker integration. Note in particular the new
> sections about 4-way redundancy with stacked DRBD, and about floating peers:
>
> http://www.drbd.org/users-guide/s-pacemaker-stacked-resources.html#s-pacemaker-stacked-4way
> http://www.drbd.org/users-guide/s-pacemaker-floating-peers.html
>
> - Three new chapters (15, 16, and 17) on optimizing DRBD performance. As
> usual, please be advised that performance tuning is not an exact
> science, so your mileage may vary when applying these recommendations:
>
> http://www.drbd.org/users-guide/p-performance.html
>
> This also marks the effective end of the DRBD User's Guide Extended
> Edition, which used to be available to LINBIT's customers. The Extended
> Edition is being superseded in its role by the DRBD Documentation
> Library, comprising the User's Guide and a number of advanced technical
> guides containing very in-depth information about utilizing DRBD in a
> number of high availability use cases.
>
> Those who have contacted us and have been patiently waiting for PDF
> versions of the public User's Guide, thanks a lot for your cooperation.
> You will receive your PDFs this afternoon. If you want a PDF and haven't
> received one yet, drop us a line at http://www.linbit.com/en/contact and
> we'll get back to you. Thanks!
>
> Cheers,
> Florian
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> drbd-user mailing list
> drbd-user [at] lists
> http://lists.linbit.com/mailman/listinfo/drbd-user
>

--
Hervé GAUTIER

_______________________________________________
drbd-user mailing list
drbd-user [at] lists
http://lists.linbit.com/mailman/listinfo/drbd-user

chibi at gol

Oct 15, 2009, 11:32 PM

Post #3 of 4 (765 views)
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Re: DRBD User's Guide 1.3.0 [In reply to]

Hello Florian,

On Thu, 15 Oct 2009 12:42:06 +0200 Florian Haas wrote:
>
> - Three new chapters (15, 16, and 17) on optimizing DRBD performance. As
> usual, please be advised that performance tuning is not an exact
> science, so your mileage may vary when applying these recommendations:
>
> http://www.drbd.org/users-guide/p-performance.html
>
Now I'm confused. In the guide it says to keep max-epoch-size and
max-buffers the same for best performance, while the manpage states to keep
unplug-watermark the same as max-buffers. Which one is it?
Or is the conclusion to keep all of them at the same value? ^o^

Still searching for those elusive 70MB/s that are lacking from setup with
a 200MB/s IO subsystem and a 3.4Gb/s network link.

Regards,

Christian
--
Christian Balzer Network/Systems Engineer
chibi [at] gol Global OnLine Japan/Fusion Communications
http://www.gol.com/
_______________________________________________
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florian.haas at linbit

Oct 20, 2009, 5:21 AM

Post #4 of 4 (724 views)
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Re: DRBD User's Guide 1.3.0 [In reply to]

On 2009-10-16 08:32, Christian Balzer wrote:
> Hello Florian,
>
> On Thu, 15 Oct 2009 12:42:06 +0200 Florian Haas wrote:
>> - Three new chapters (15, 16, and 17) on optimizing DRBD performance. As
>> usual, please be advised that performance tuning is not an exact
>> science, so your mileage may vary when applying these recommendations:
>>
>> http://www.drbd.org/users-guide/p-performance.html
>>
> Now I'm confused. In the guide it says to keep max-epoch-size and
> max-buffers the same for best performance, while the manpage states to keep
> unplug-watermark the same as max-buffers. Which one is it?
> Or is the conclusion to keep all of them at the same value? ^o^

The man page is wrong. Will be fixed. Thanks.

Cheers,
Florian

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