>> Hi,<br>
>><br>
> >I have seen one of the document that drbd will support upto 255
devices.<br>
>><br>
>> I want to know would it be possible to increase this number??<br>
>><br>
<br>
>Yes<br>
<br>
>> I would be appreciated for your quick response.<br>
>><br>
<br>
>Quick, and short :)<br>
<br>Could you guide me how it can be acheived and what is the maximum number of devices can be supported? <br><br><br>Thanks,<br>Siva<br><br><div class="gmail_quote">On Wed, Mar 16, 2011 at 4:30 PM, <span dir="ltr"><<a href="mailto:drbd-user-request@lists.linbit.com">drbd-user-request@lists.linbit.com</a>></span> wrote:<br>
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<br>
Today's Topics:<br>
<br>
1. Re: communication constantly terminated, always re-syncing<br>
(Lars Ellenberg)<br>
2. Re: Pause Verify ? (Lars Ellenberg)<br>
3. Fix Fragmentation on an ext3 filesystem on DRBD? (Robinson, Eric)<br>
4. Re: DRBD for 1 TB of data (Robinson, Eric)<br>
5. Re: Fix Fragmentation on an ext3 filesystem on DRBD? (Ed Groth)<br>
6. Maximum number of drbd devices supported? (siva subramani)<br>
7. Re: Maximum number of drbd devices supported? (Philipp Reisner)<br>
<br>
<br>
----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Tue, 15 Mar 2011 17:04:03 +0100<br>
From: Lars Ellenberg <<a href="mailto:lars.ellenberg@linbit.com">lars.ellenberg@linbit.com</a>><br>
Subject: Re: [DRBD-user] communication constantly terminated, always<br>
re-syncing<br>
To: <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a><br>
Message-ID: <20110315160403.GF11932@barkeeper1-xen.linbit><br>
Content-Type: text/plain; charset=us-ascii<br>
<br>
On Fri, Mar 11, 2011 at 10:16:19AM -0500, Cory Coager wrote:<br>
> On 03/04/2011 09:42 AM, Lars Ellenberg wrote:<br>
> >I wrote: my best guess is your NIC hardware is broken. These logs are<br>
> >more complete than what you posted before, though, so you _may_<br>
> >just have a pathologicall case of data buffers modified in flight.<br>
> I haven't upgraded drbd yet but I did replace the NIC's in both<br>
> machines. Unfortunately it didn't resolve the issue, I still see<br>
> errors all day long.<br>
><br>
> If I am a victim of data buffers modified in flight, is there any<br>
> fix for this? I read through your links and it seems like they have<br>
> a custom kernel patch that is untested. Is there any work around<br>
> besides this?<br>
<br>
As mentioned in the several times referenced thread<br>
<a href="http://www.mail-archive.com/drbd-user@lists.linbit.com/msg03373.html" target="_blank">http://www.mail-archive.com/drbd-user@lists.linbit.com/msg03373.html</a>:<br>
...<br>
If you don't want to know about [data integrity digest mismatches],<br>
disable that check.<br>
If the replication link interruptions caused by that check<br>
are bad for your setup (particularly so in dual primary setups),<br>
disable that check.<br>
...<br>
<br>
So, maybe you want to disable that check?<br>
<br>
;-)<br>
<br>
<br>
--<br>
: Lars Ellenberg<br>
: LINBIT | Your Way to High Availability<br>
: DRBD/HA support and consulting <a href="http://www.linbit.com" target="_blank">http://www.linbit.com</a><br>
<br>
<br>
------------------------------<br>
<br>
Message: 2<br>
Date: Tue, 15 Mar 2011 17:08:21 +0100<br>
From: Lars Ellenberg <<a href="mailto:lars.ellenberg@linbit.com">lars.ellenberg@linbit.com</a>><br>
Subject: Re: [DRBD-user] Pause Verify ?<br>
To: <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a><br>
Message-ID: <20110315160821.GG11932@barkeeper1-xen.linbit><br>
Content-Type: text/plain; charset=us-ascii<br>
<br>
On Fri, Mar 04, 2011 at 12:19:41PM +0100, netz-haut - stephan seitz wrote:<br>
> Hi,<br>
><br>
> I didn't find any documentation about this, but I wonder if it is somehow possible to pause/continue a drbdadm verify?<br>
<br>
Disconnect will "interrupt" it. The next verify after the next connect<br>
"should" usually start from where the last one left off.<br>
<br>
Other than that, you can only throttle the rate at which it tries to do<br>
the verify. Rate settings for verify are the same as for resync, so<br>
syncer { rate, c-min-rate, c-max-rate, c-plan-ahead ... }.<br>
<br>
--<br>
: Lars Ellenberg<br>
: LINBIT | Your Way to High Availability<br>
: DRBD/HA support and consulting <a href="http://www.linbit.com" target="_blank">http://www.linbit.com</a><br>
<br>
<br>
------------------------------<br>
<br>
Message: 3<br>
Date: Tue, 15 Mar 2011 11:28:52 -0700<br>
From: "Robinson, Eric" <<a href="mailto:eric.robinson@psmnv.com">eric.robinson@psmnv.com</a>><br>
Subject: [DRBD-user] Fix Fragmentation on an ext3 filesystem on DRBD?<br>
To: <<a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a>><br>
Message-ID:<br>
<<a href="mailto:768FEA3F936926468F594E3CA7741FE802C73E99@ipa-vault.nvipa.com">768FEA3F936926468F594E3CA7741FE802C73E99@ipa-vault.nvipa.com</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
I know most people say ext3 does not fragment, but that it not quite<br>
true. Linux is better than Windows, but not perfect. It does fragment. I<br>
have a system hosting multiple instances of MySQL with maybe 100<br>
separate databases, all of which are being inserted throughout the day.<br>
My iowaits have steadily increased over time and I believe some of it is<br>
due to fragmentation. The real questions are (1) what is the best way to<br>
fix it, and (2) are there any possible repercussions to defragmenting a<br>
filesystem that rides on a DRBD device? I assume the answer to the<br>
second question is no. Does anyone have thoughts on the first question?<br>
What if we just copy all of the data off of the filesystem, rm -rf it,<br>
and then copy it back in? Or should we try to use some kind of ext3<br>
defragmenter?<br>
<br>
<br>
--<br>
Eric Robinson<br>
<br>
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<br>
<br>
<br>
Disclaimer - March 15, 2011<br>
This email and any files transmitted with it are confidential and intended solely for <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a>. If you are not the named addressee you should not disseminate, distribute, copy or alter this email. Any views or opinions presented in this email are solely those of the author and might not represent those of Physicians' Managed Care or Physician Select Management. Warning: Although Physicians' Managed Care or Physician Select Management has taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments.<br>
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------------------------------<br>
<br>
Message: 4<br>
Date: Tue, 15 Mar 2011 14:58:49 -0700<br>
From: "Robinson, Eric" <<a href="mailto:eric.robinson@psmnv.com">eric.robinson@psmnv.com</a>><br>
Subject: Re: [DRBD-user] DRBD for 1 TB of data<br>
To: "Ben" <<a href="mailto:ben.wxc@gmail.com">ben.wxc@gmail.com</a>>, "Geetha Thanu" <<a href="mailto:thanu.geetha@gmail.com">thanu.geetha@gmail.com</a>><br>
Cc: <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a><br>
Message-ID:<br>
<<a href="mailto:768FEA3F936926468F594E3CA7741FE802C73EFE@ipa-vault.nvipa.com">768FEA3F936926468F594E3CA7741FE802C73EFE@ipa-vault.nvipa.com</a>><br>
Content-Type: text/plain; charset="us-ascii"<br>
<br>
I sure hope it works. We're using DRBD 8.3.2 and we already have 1.4TB<br>
of data on our DRBD device. :-)<br>
<br>
--<br>
Eric Robinson<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
<br>
Disclaimer - March 15, 2011<br>
This email and any files transmitted with it are confidential and intended solely for Ben,Geetha Thanu,<a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a>. If you are not the named addressee you should not disseminate, distribute, copy or alter this email. Any views or opinions presented in this email are solely those of the author and might not represent those of Physicians' Managed Care or Physician Select Management. Warning: Although Physicians' Managed Care or Physician Select Management has taken reasonable precautions to ensure no viruses are present in this email, the company cannot accept responsibility for any loss or damage arising from the use of this email or attachments.<br>
This disclaimer was added by Policy Patrol: <a href="http://www.policypatrol.com/" target="_blank">http://www.policypatrol.com/</a><br>
<br>
<br>
------------------------------<br>
<br>
Message: 5<br>
Date: Tue, 15 Mar 2011 15:06:54 -0700<br>
From: Ed Groth <<a href="mailto:ed@boxpopuli.com">ed@boxpopuli.com</a>><br>
Subject: Re: [DRBD-user] Fix Fragmentation on an ext3 filesystem on<br>
DRBD?<br>
To: "Robinson, Eric" <<a href="mailto:eric.robinson@psmnv.com">eric.robinson@psmnv.com</a>><br>
Cc: <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a><br>
Message-ID:<br>
<<a href="mailto:AANLkTikBpYoyJgeyiDbmovRE3fFczMJn5Lu-hO5DvT2v@mail.gmail.com">AANLkTikBpYoyJgeyiDbmovRE3fFczMJn5Lu-hO5DvT2v@mail.gmail.com</a>><br>
Content-Type: text/plain; charset=ISO-8859-1<br>
<br>
Yep, using Tar to backup and restore is the most common way to<br>
defragment a Unix filesystem.<br>
<br>
If there's space you can create the tar archive on the filesystem itself.<br>
<br>
Ed<br>
<br>
On Tue, Mar 15, 2011 at 11:28 AM, Robinson, Eric<br>
<<a href="mailto:eric.robinson@psmnv.com">eric.robinson@psmnv.com</a>> wrote:<br>
> I know most people say ext3 does not fragment, but that it not quite true.<br>
> Linux is better than Windows, but not perfect. It does fragment. I have a<br>
> system hosting multiple instances of MySQL with maybe 100 separate<br>
> databases, all of which are being inserted throughout the day. My iowaits<br>
> have steadily increased over time and I believe some of it is due to<br>
> fragmentation. The real questions?are (1) what is the best way to fix it,<br>
> and (2) are there any possible repercussions to defragmenting a filesystem<br>
> that rides on a DRBD device? I assume the answer to the second question is<br>
> no. Does anyone have thoughts on the first question? What if we just copy<br>
> all of the data off of the filesystem, rm -rf it, and then copy it back in?<br>
> Or should we try to use some kind of ext3 defragmenter?<br>
><br>
><br>
> --<br>
> Eric Robinson<br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
><br>
> Disclaimer - March 15, 2011<br>
><br>
> This email and any files transmitted with it are confidential and intended<br>
> solely for <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a>. If you are not the named addressee<br>
> you should not disseminate, distribute, copy or alter this email. Any views<br>
> or opinions presented in this email are solely those of the author and might<br>
> not represent those of Physicians' Managed Care or Physician Select<br>
> Management. Warning: Although Physicians' Managed Care or Physician Select<br>
> Management has taken reasonable precautions to ensure no viruses are present<br>
> in this email, the company cannot accept responsibility for any loss or<br>
> damage arising from the use of this email or attachments.<br>
> _______________________________________________<br>
> drbd-user mailing list<br>
> <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a><br>
> <a href="http://lists.linbit.com/mailman/listinfo/drbd-user" target="_blank">http://lists.linbit.com/mailman/listinfo/drbd-user</a><br>
><br>
><br>
<br>
<br>
------------------------------<br>
<br>
Message: 6<br>
Date: Wed, 16 Mar 2011 07:23:57 +0530<br>
From: siva subramani <<a href="mailto:siva.kernel@gmail.com">siva.kernel@gmail.com</a>><br>
Subject: [DRBD-user] Maximum number of drbd devices supported?<br>
To: <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a><br>
Message-ID:<br>
<AANLkTi=<a href="mailto:BEjindy9EBmd3bUBV-Vye8NYPXjdUVCSt9seH@mail.gmail.com">BEjindy9EBmd3bUBV-Vye8NYPXjdUVCSt9seH@mail.gmail.com</a>><br>
Content-Type: text/plain; charset="iso-8859-1"<br>
<br>
Hi,<br>
<br>
I have seen one of the document that drbd will support upto 255 devices.<br>
<br>
I want to know would it be possible to increase this number??<br>
<br>
I would be appreciated for your quick response.<br>
<br>
Regards,<br>
Siva<br>
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Message: 7<br>
Date: Wed, 16 Mar 2011 10:34:10 +0100<br>
From: Philipp Reisner <<a href="mailto:philipp.reisner@linbit.com">philipp.reisner@linbit.com</a>><br>
Subject: Re: [DRBD-user] Maximum number of drbd devices supported?<br>
To: <a href="mailto:drbd-user@lists.linbit.com">drbd-user@lists.linbit.com</a><br>
Message-ID: <<a href="mailto:201103161034.10854.philipp.reisner@linbit.com">201103161034.10854.philipp.reisner@linbit.com</a>><br>
Content-Type: Text/Plain; charset="iso-8859-15"<br>
<br>
Am Mittwoch, 16. M?rz 2011, um 02:53:57 schrieb siva subramani:<br>
> Hi,<br>
><br>
> I have seen one of the document that drbd will support upto 255 devices.<br>
><br>
> I want to know would it be possible to increase this number??<br>
><br>
<br>
Yes<br>
<br>
> I would be appreciated for your quick response.<br>
><br>
<br>
Quick, and short :)<br>
<br>
Best,<br>
Phil<br>
--<br>
: Dipl-Ing Philipp Reisner<br>
: LINBIT | Your Way to High Availability<br>
: Tel: +43-1-8178292-50, Fax: +43-1-8178292-82<br>
: <a href="http://www.linbit.com" target="_blank">http://www.linbit.com</a><br>
<br>
DRBD(R) and LINBIT(R) are registered trademarks of LINBIT, Austria.<br>
<br>
<br>
------------------------------<br>
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End of drbd-user Digest, Vol 80, Issue 23<br>
*****************************************<br>
</blockquote></div><br>