suggest we start at 9:30 in the morning and go from there.
Regards,
Lars
Is it possible, if this isn't set in stone, to push back to later in the
day? I don't fly in until the 25th, and I think there is one other
person who wants to attend in the same boat.
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E-Mail
there will be at least a few who will have trouble making the
unofficial meeting on the 26th, perhaps we could have an even more
informal meeting/talk/debrief/waffles on Saturday morning?
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.
You have to choose the maker carefully, as not all switched PDUs have
agents (APC, Eaton and a couple others do, I think). This is your best
bet to add fencing to your desktop machines.
Cheers
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:
https://alteeve.ca/w/2-Node_Red_Hat_KVM_Cluster_Tutorial#Concept.3B_Fencing
Hope this helps. :)
digimer
On 10/25/2012 11:50 PM, Josh Bowling wrote:
Wow, thanks for the links, they've really help to clear this up a bit for
me.
From what I understand, out-of-band IPMI is what allows admins/other
Different vendors handle IPMI differently... It's likely that you don't
have the right username/password combo, but you would need to refer to
your server's manual for details on how to manage users. Most systems
have a BIOS and Web UI for this.
digimer
On 10/30/2012 12:26 AM, Josh Bowling wrote
On 11/14/2012 09:38 AM, Lars Marowsky-Bree wrote:
And just as naturally I can't stop anyone from working and coding
and supporting whatever they like, I can naturally voice my disagreement
;-)
Regards,
Lars
That's what makes open-source's ecosystem so vibrant. :)
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by definition,
anything can change at any time. This is what happened here, so I don't
see a problem.
Of course, other distros are free to standardize on crm, lcmc or
whatever they want. In those distros, perhaps crm remains and will
remain the default into the future.
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On 11/14/2012 02:17 PM, Lars Marowsky-Bree wrote:
On 2012-11-14T12:44:53, Digimer li...@alteeve.ca wrote:
Not really, to be honest. The way I see it is that Pacemaker is in tech
preview (on rhel, which is where I live). So almost by definition,
anything can change at any time. This is what
to become more active here.
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throughout it's life cycle.
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It's getting close to Christmas, so there's my wish list. :-)
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I'd like a pony and an extra day per week, please.
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plan to use corosync.
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+ pacemaker. I would
start by learning more about them.
cheers
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was specific to Red Hat. How other distros
choose to support pacemaker (and any other application) is entirely
their choice, of course.
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-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
On 11/15/2012 03:03 PM, Dimitri Maziuk wrote:
On 11/15/2012 10:11 AM, Digimer wrote:
On 11/15/2012 02:52 AM, julien.marie...@soget.fr wrote:
Hello,
I have to secure a homemade monitoring solution mainly based
on Nagios 2.x and MySQL 5.1.
I
, is this right? Is there a gui for this like a web interface?
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quorum.
Clustering all all about protecting against failures. Hand-waving a
failure as unlikely is not a good practice in HA clustering. If it's
possible, plan for it. :)
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experience).
So if you tied your virtual IP and tomcat resources together in
pacemaker, then the failure of one will trigger the restart or migration
of both.
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, I do not use tomcat and I don't know about
load-balancing/performance clusters. That is why I kept speaking in
general terms. To be honest, I think what you are looking for is not
pacemaker but Red Hat's LVM.
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of that given service and
it very likely will differ from one service to the next.
*From:* Digimer li...@alteeve.ca
*To:* David Coulson da...@davidcoulson.net
*Cc:* Hermes Flying flyingher...@yahoo.com; General Linux-HA mailing
on corosync failure I assume the primary does nothing, as it does
not care about the backups. Is this correct?
This question doesn't make sense.
Thank you!
np
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*From:* Digimer li...@alteeve.ca
*To:* Hermes Flying flyingher...@yahoo.com; General Linux-HA mailing
list linux-ha@lists.linux-ha.org
*Sent:* Sunday, December 2, 2012 8:22 PM
*Subject:* Re: [Linux-HA] Corosync on cluster with 3
of nodes)?
*From:* Digimer li...@alteeve.ca
*To:* Hermes Flying flyingher...@yahoo.com
*Cc:* General Linux-HA mailing list linux-ha@lists.linux-ha.org
*Sent:* Sunday, December 2, 2012 8:46 PM
*Subject:* Re: [Linux-HA
can't and won't do anything. It's dead. It will not restart.
The other node(s) in the cluster will declare that node lost and will
fence it.
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device is IPMI, iLO, RSA, iDRAC and the like.
Alternatives are switched PDUs, like APC's AP7900.
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?
*From:* Digimer li...@alteeve.ca
*To:* Hermes Flying flyingher...@yahoo.com
*Cc:* General Linux-HA mailing list linux-ha@lists.linux-ha.org
*Sent:* Sunday, December 2, 2012 10:01 PM
*Subject:* Re: [Linux-HA] Corosync on cluster with 3+ nodes
On 12/02/2012
for alternative?
*From:* Digimer li...@alteeve.ca
*To:* Hermes Flying flyingher...@yahoo.com
*Cc:* General Linux-HA mailing list linux-ha@lists.linux-ha.org
*Sent:* Sunday, December 2, 2012 10:19 PM
*Subject:* Re
. In this scenario, the IPMI BMC is down and
can't reply to the other node.
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servers mentioning VMK (optional) and others are Fujitsu
mentioning iRMC.
Not sure what can I do in the IBM case
*From:* Digimer li...@alteeve.ca
*To:* Hermes Flying flyingher...@yahoo.com
*Cc:* General Linux-HA mailing
, right? How is
geo-separated nodes supported?
*From:* Digimer li...@alteeve.ca
*To:* General Linux-HA mailing list linux-ha@lists.linux-ha.org
*Cc:* Andrew Beekhof and...@beekhof.net; Hermes Flying
flyingher
if corosync fails in all nodes? Will all 3 try to kill
eachother?
*From:* Digimer li...@alteeve.ca
*To:* Hermes Flying flyingher...@yahoo.com
*Cc:* General Linux-HA mailing list linux-ha@lists.linux-ha.org
*Sent:* Monday
?
*From:* Digimer li...@alteeve.ca
*To:* Hermes Flying flyingher...@yahoo.com
*Cc:* General Linux-HA mailing list linux-ha@lists.linux-ha.org;
Andrew Beekhof and...@beekhof.net
*Sent:* Monday, December 3, 2012 2:07 PM
*Subject:* Re: [Linux-HA] Does stonith always succeed
a script copying files from one server to the
other.
Thanks.
Use a VM for your server(s) and put the VM(s) on DRBD.
So far as I know, you can not replicate / between two servers directly.
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by pacemaker and corosync. You
can read about it (including in PDF format) below:
http://www.clusterlabs.org/doc/
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by pacemaker and corosync.’
into http://www.linux-ha.org
http://www.linux-ha.org/doc/users-guide/_preface.html home page.
2012/12/5 Digimer li...@alteeve.ca mailto:li...@alteeve.ca
On 12/03/2012 10:26 PM, Shuge Lee wrote:
Hi all:
Please share user guide in PDF format
point.
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On 12/06/2012 09:43 AM, Digimer wrote:
On 12/06/2012 03:26 AM, Lars Marowsky-Bree wrote:
On 2012-12-06T00:02:28, Hermes Flying flyingher...@yahoo.com wrote:
Hi,
I was wondering how does fencing/STONITH work in a VM environment?
Obviously the nodes running inside a VM should run in separate
others) periodically drop multicast groups
as a way to clean up stale groups, figuring the client will just
re-request membership. Trouble is, it takes too long so the cluster
fails. The answer is to set a static multicast group in the switch.
I believe you can use omping to test multicast.
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.
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.
On 12/19/2012 12:48 PM, Felipe Gutierrez wrote:
Hi Digimer,
I am already using crm-fence-peer.sh
resource r8 {
handlers {
fence-peer /usr/lib/drbd/crm-fence-peer.sh;
after-resync-target /usr/lib/drbd/crm-unfence-peer.sh;
split-brain /usr/lib/drbd/notify-split-brain.sh root
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See
in
the cluster).
I mean: Not the RA through CRM triggers fencing, but the DRBD itself by
using some scripts...
That is likely to change in the near future (at least for those
running 1.1.8 or higher)
Can you elaborate? Inquiring minds want to know... :)
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On 01/03/2013 10:09 PM, Andrew Beekhof wrote:
On Fri, Jan 4, 2013 at 12:43 PM, Digimer li...@alteeve.ca wrote:
On 01/03/2013 08:38 PM, Andrew Beekhof wrote:
On Thu, Dec 20, 2012 at 7:04 PM, Ulrich Windl
ulrich.wi...@rz.uni-regensburg.de wrote:
Hi!
Just a comment: I always felt that DRBD
in my clusters.
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of the bond is in a different
switch, so I can survive total switch failures as well as individual
link losses.
RRP now recovers to the first ring automatically. Older versions of
corosync didn't, but it was fixed some time ago.
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What
I think you replied to the wrong email. :)
digimer, who is sorry to hear about your troubles.
On 01/08/2013 12:19 PM, mark.gard...@kc.frb.org wrote:
Unfortunately this is not a VM. We have ZCM 11 in production, but
cannot use it due to an incompatibility with Symantec Endpoint
Protection
On 01/09/2013 05:32 AM, Lars Marowsky-Bree wrote:
On 2013-01-08T10:03:20, Digimer li...@alteeve.ca wrote:
If you use two separate networks for RRP, and each network sits on top
of a mode=1 bond, then you will have the highest redundancy. I do this
with stacked switches where each leg
with the assumption that your gear is good quality.
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On 01/09/2013 10:55 AM, Michael Schwartzkopff wrote:
Am Mittwoch, 9. Januar 2013, 10:40:42 schrieb Digimer:
On 01/09/2013 08:16 AM, Michael Schwartzkopff wrote:
Am Mittwoch, 9. Januar 2013, 14:09:59 schrieb Andreas Mock:
Hi all,
I'm really interested in the results of testing
several
can use Pacemaker, which many companies offer
support for. Red Hat will switch to pacemaker in the next release as
well, so pacemaker is the best resource manager to use.
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with
opensource license. Please also share the links from where I can download the
prebuild packages.
Thanks Regards
Navneet Khanuja
From: Digimer [li...@alteeve.ca]
Sent: 14 January 2013 20:17
To: General Linux-HA mailing list
Cc: Navneet Khanuja
+ cman + rgmanager. It's
the officially supported HA platform at this time.
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for any help!
Take a look at fence_xvm as well, it's multicast-based.
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. This is needed anyway, for safety reasons (prevents
split-brains) and it's an effective tie-breaker.
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On 01/22/2013 08:26 PM, Alex Sudakar wrote:
Hello Digimer,
The device you are thinking of is probably quorum disk, or qdisk.
In the early days of red hat clustering, this was required. Then it
became optional and now it's falling out of favour. It's still usable
though and you can use
? Which
wouldn't be detected by running ethtool locally.
But it's a good check to run regardless, thanks!
A stray iptables rule would knock you out without dropping the link layer.
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how to build it here:
https://alteeve.ca/w/2-Node_Red_Hat_KVM_Cluster_Tutorial
There is a new graphical interface, too. You can use it to manage the
host nodes, existing VMs and create/delete VMs from the cluster;
https://github.com/digimer/an-cdb
http://imgur.com/a/YPfZu#0
It uses corosync + cman
also: http://linux-ha.org/ReportingProblems
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version numbers in a given RHEL
release to minimize the chance of instability and conflict. So CentOS,
being a clone of RHEL6, also doesn't include it.
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http
?
I don't use either, so I can't say. I would recommend reading the
Clusters from Scratch which is maintained by the author of Pacemaker;
http://clusterlabs.org/doc/
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time to learn how it works. You will also want to make sure that you
test updates before applying them to production machines.
*Personally*, I stick to rhcs. That said, the more people who use
pacemaker, the better it will get.
It's really up to you.
Hope this helps shed light.
digimer
out to the logs?
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the best platform for long-term growth of open source clustering.
As for multi-DC support, watch the booth project. It's supposed to bring
stretch clustering to corosync + pacemaker.
digimer
On 08/07/13 19:37, David Lang wrote:
Why is corosync replacing heartbeat? it seems like there are a number
On 09/07/13 07:57, Lars Marowsky-Bree wrote:
On 2013-07-08T22:35:31, Digimer li...@alteeve.ca wrote:
As for multi-DC support, watch the booth project. It's supposed to bring
stretch clustering to corosync + pacemaker.
Stretch clustering is already possible and supported (depending on whom
and will
be properly supported until 2020 (at least), and not need hacks.
If you're interested in this approach, I can help. Here or on
#linux-cluster on freenode's IRC.
digimer
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On 18/07/13 00:12, Martin Langhoff wrote:
On Wed, Jul 17, 2013 at 9:34 PM, Digimer li...@alteeve.ca wrote:
The easiest, native way under RHEL/CentOS is to use corosync + cman +
rgmanager. The configuration you are describing will be simple and will be
properly supported until 2020 (at least
On 22/07/13 10:24, Dejan Muhamedagic wrote:
Test. Please ignore.
NAK
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fence and resource agents.
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On 29/07/13 19:20, David Vossel wrote:
- Original Message -
From: Digimer li...@alteeve.ca
To: General Linux-HA mailing list linux-ha@lists.linux-ha.org
Cc: David Vossel dvos...@redhat.com
Sent: Monday, July 29, 2013 5:21:00 PM
Subject: Re: [Linux-HA] establishing a new resource-agent
/ReportingProblems
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provides a reliable communications layer for high availability
clusters. It ensures that cluster nodes can send and receive messages
over
multiple, redundant communication paths.
so you can use corosync instead of heartbeat whih serves the same
purpose.
On Fri, Aug 23, 2013 at 8:02 PM, Digimer li
) and 192.168.1.254 (eth2) on the other.
Best regards.
Francis
Not at the same time, no. Corosync will use ring 0 for as long as it
is available and working. If the interface/bond behind ring 0 fails, it
will switch to ring 1.
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Nope, that just enables RRP (without it, the failure of ring 0 would
fail the cluster)
On 26/08/13 10:27, Moullé Alain wrote:
Hi,
sorry but I thought that if we set rrp_mode to active, corosync is
using both rings at the same time , isn't it ?
Alain
Le 26/08/2013 15:53, Digimer a écrit
- PDU fence configuration until
v1.1.10 which was released not too long ago;
http://clusterlabs.org/wiki/Fencing_topology
If you switch to pcs if/when you upgrade, this is the pcs version of the
above tutorial;
http://clusterlabs.org/wiki/STONITH_Levels
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'reboot'.
But I was reading the 'Fencing topology' document that Digimer
referenced and I was reminded in my perusal that many people/clusters
use a 'reboot' action.
For a simple quorum-less cluster of two nodes how do those clusters
avoid a never-ending cycle of each node killing the other
as the source of
your trouble.
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On 03/09/13 13:02, Lars Marowsky-Bree wrote:
On 2013-09-03T10:25:58, Digimer li...@alteeve.ca wrote:
I've run only 2-node clusters and I've not seen this problem. That said,
I've long-ago moved off of openais in favour of corosync. Given that
membership is handled there, I would look
On 03/09/13 13:08, Lars Marowsky-Bree wrote:
On 2013-09-03T13:04:52, Digimer li...@alteeve.ca wrote:
My mistake then. I had assumed that corosync was just a stripped down
openais, so I figured openais provided the same functions. My personal
experience with openais is limited to my early days
On 03/09/13 14:14, Vladislav Bogdanov wrote:
03.09.2013 07:04, Digimer wrote:
...
To solve problem 1, you can set a delay against one of the nodes. Say
you set the fence primitive for node 01 to have 'delay=15'. When node
1 goes to fence node 2, it starts immediately. When node 2 starts
-ha.org/ReportingProblems
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Moving to corosync is very highly recommended. I've never tested it
under powerpc, but at least the devs are around to help if you run into
trouble (and assuming it's possible).
digimer
On 18/09/13 12:22, Emilio López wrote:
Thank you very much for your answers. The issue is that I'm gonna have
+ pacemaker. A good place to start is
Clusters from Scratch, written by pacemaker's author, which can be
found here;
http://clusterlabs.org/doc/
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Loadbalancer.org
You should give Linbit a call. They're maintaining the heatbeat code and
offer commercial support.
https://www.linbit.com/en/company/contact
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that had been running on the dead node. The details of this, though,
are decided by you when you configure the resources in pacemaker.
Hope this helps! It's pretty high-level and simplifies a few things, but
hopefully it helps you understand the mechanics. :)
digimer
PS - Please reply to the mailing
to be long enough to account for the slower speeds).
I'd love to hear a corosync dev chime in on this.
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Again, I am not a dev, but my understanding was always that one ring or
the other was used, not both. When I experimented with RRP, I saw that
the rings would fail over and recover, implying to me that no, they
don't use both at the same time.
digimer
On 17/10/13 10:37, Moullé Alain wrote:
Hi
and there are no plans to restart it. All projects should be
using corosync + pacemaker (or making plans to migrate to it).
digimer
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Papers and Projects: https://alteeve.ca/w/
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limit.
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Is this a new project? If so, heartbeat is (long) deprecated. New
projects should be based on corosync + pacemaker. All other HA stacks
are merging to those programs.
digimer
On 01/12/13 10:49, John Williams wrote:
I'm trying to install heartbeat and I'm getting the following error
deprecated for a while and has no future (though Linbit does still
support it, there are no plans to restart development).
cheers
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Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
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been working hard to unify under one common open-source HA
stack. Pacemaker + corosync v2+ is the result of all that hard work. :)
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Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
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On 04/01/14 11:39 AM, Lars Marowsky-Bree wrote:
On 2014-01-03T20:56:42, Digimer li...@alteeve.ca wrote:
causing a lot of reinvention of the wheel. In the last 5~6 years, both teams
have been working hard to unify under one common open-source HA stack.
Pacemaker + corosync v2+ is the result
very much appreciated. Everything from
typos/grammar mistakes, functional problems or anything else is very
valuable. I take all the feedback I get and use it to helping make the
tutorials better.
Enjoy!
Digimer, who now can now start the next tutorial in earnest!
1. https://alteeve.ca/w
you've experienced. At the very least, enable fencing. Strongly
recommend fencing, too.
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Digimer
Papers and Projects: https://alteeve.ca/w/
What if the cure for cancer is trapped in the mind of a person without
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On 14/01/14 08:35 AM, Jan Pokorný wrote:
On 07/01/14 10:50 -0500, David Vossel wrote:
- Original Message -
From: Digimer li...@alteeve.ca
To: General Linux-HA mailing list linux-ha@lists.linux-ha.org
Sent: Monday, January 6, 2014 10:19:05 AM
Subject: [Linux-HA] Announcing a new HA KVM
with mirroring' triggers this? I've used
clvmd a lot, but I've never looked at mirroring in LVM (though I know
it's possible).
If possible, can you share your cluster.conf (and crm configure show if
using pacemaker, too)?
digimer
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Papers and Projects: https://alteeve.ca/w/
What if the cure
it has the most vibrant community as well.
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