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Iasen Kostov | 1 Aug 2005 15:57
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Re: Cluster links

Nick I wrote:

>Hi,
>
>I work on a Web site at www.clusterbuilder.org.  The site highlights a
>broad spectrum of high performance computing related technologies.  It
>has links to reviews, comparisons, pricing and other information
>related to the many HPC solutions available. The site also allows for
>you to complete one request-for-quote form and have multiple hardware
>vendors of your choice provide pricing quotes to you.
>
>We need knowledgeable cluster users to submit sites that have proved a
>valuable resources to them.  One particular area that we want to make
>sure is complete is the Operating Systems section, which Debian is
>listed under.  We want to find information that helps HPC
>users using Yellow Dog Linux Please take a minute and submit
>additional links associated with Debian, operating systems or other
>areas that will benefit the HPC community. (To submit content for the
>site, click on the Submit Content section on www.clusterbuilder.org).
>
>Thank you for your help.
>
>Nick
>_______________________________________________
>freebsd-cluster <at> freebsd.org mailing list
>http://lists.freebsd.org/mailman/listinfo/freebsd-cluster
>To unsubscribe, send any mail to "freebsd-cluster-unsubscribe <at> freebsd.org"
>
>  
>
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Anton Nikiforov | 1 Aug 2005 19:02
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DRBD-like something for FreeBSD

Dear ALL,
I'm running a few clusters with Linux, but do not like it ;) and would 
like to move to FreeBSD.
I know about vrrpd and pfsync and other solutions, i know how to run 
Oracle or Postfix or PostgreSQL under such a configuration. but the only 
thing i cannot find is something like DRBD device that is working pretty 
cool and stable under linux (it is mirroring raw partitions from one 
node to other/s).
Could someone please direct me to the link or list where i can read 
something about?

Best regards,
Anton Nikiforov
Attachment (smime.p7s): application/x-pkcs7-signature, 2218 bytes
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Eric Anderson | 1 Aug 2005 21:29
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Re: DRBD-like something for FreeBSD

Anton Nikiforov wrote:
> Dear ALL,
> I'm running a few clusters with Linux, but do not like it ;) and would 
> like to move to FreeBSD.
> I know about vrrpd and pfsync and other solutions, i know how to run 
> Oracle or Postfix or PostgreSQL under such a configuration. but the only 
> thing i cannot find is something like DRBD device that is working pretty 
> cool and stable under linux (it is mirroring raw partitions from one 
> node to other/s).
> Could someone please direct me to the link or list where i can read 
> something about?

GEOM Gate and GEOM mirror are probably what you want.  Check out ggated, 
ggatec and geom_mirror.

Eric

--

-- 
------------------------------------------------------------------------
Eric Anderson        Sr. Systems Administrator        Centaur Technology
Anything that works is better than anything that doesn't.
------------------------------------------------------------------------
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Anton Nikiforov | 3 Aug 2005 20:43
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Re: DRBD-like something for FreeBSD

Eric Anderson wrote:

> Anton Nikiforov wrote:
> 
>> Dear ALL,
>> I'm running a few clusters with Linux, but do not like it ;) and would 
>> like to move to FreeBSD.
>> I know about vrrpd and pfsync and other solutions, i know how to run 
>> Oracle or Postfix or PostgreSQL under such a configuration. but the 
>> only thing i cannot find is something like DRBD device that is working 
>> pretty cool and stable under linux (it is mirroring raw partitions 
>> from one node to other/s).
>> Could someone please direct me to the link or list where i can read 
>> something about?
> 
> 
> GEOM Gate and GEOM mirror are probably what you want.  Check out ggated, 
> ggatec and geom_mirror.
> 
> Eric
Thanks for the replay, Eric,
Please correct if i'm wrong. You suggest to make two devices one is 
local daX device and the other is ggated/gagatec device and build a 
mirror set on them using geom_mirror module and gmirror utility?
That is pretty cool idea, but what i should do in case main (ggated) 
system crash?  I'm still reading and investigating this issue, and will 
test it as soon as i'll get to PCs/Servers to test, but as for now i do 
not see the way to promote second node as prymary in case of real 
prymary crashed. Or i should test it with vrrpd (for example) and 
restart secondary as ggated instead of being ggatec? Did not clear yet.
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Dmitriy Kirhlarov | 4 Aug 2005 09:41
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Re: DRBD-like something for FreeBSD

Hi Anton!

On Wed, 03 Aug 2005, Anton Nikiforov wrote:

> not see the way to promote second node as prymary in case of real 
> prymary crashed. Or i should test it with vrrpd (for example) and 
> restart secondary as ggated instead of being ggatec? Did not clear yet. 
> If you have the solution or an idea - could you please drop me a line?

Yes.
/usr/ports/net/freevrrpd

> algorythm looks the following for me:
> We have two computers:
> stage 0 (up and running claster)
> 1. da0 is exported via ggated over the network.
> This computer runing postgresql (for example) that storing data on da0.
> 2. da1 is being imported over network via ggatec as da1. Local da0 and 
> remote da1 are mirrored via ggated/geom_mirror.ko
> and there is no service activity on this device. just a mirroring of data.

No.
When you work with ggate{c,d} you get devices ggate{0,1,2,...}. Not with da1.

> stage 1 (slave failed)
> 1. working as before
> 2. down
> Requests to update remote data failed. There should be no problem.
> 
> stage 2 (slave is coming up)
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Osmond Delaney | 15 Aug 2005 20:21

McDonald's bomber jÄiled

Hello, 
some acquaintance will see  me  and then  theyll tell my husband I  was outKoroviev - hes the devil!has  been 
sitting  on  this platform  and sleeping,  but when the full moonthree pm come. Berlioz.sounds - over him. But
before then he wont rise.will not see Yeshua, you will never leave your refuge.     Hundreds of arms were
raised,  the spectators  held the bills up to theabout the world and about power.     Well,  so, if its more
comforting,  consider me that, Woland replied     `He  casts  no  shadow!  Rimsky cried  out desperately in his
mind. Heeven  moaned,  began talking  to himself, got up. The  storm raged more  andshe had received from
Azazello, and Margarita did not take her eyes from itsthe same company.     Here the girls story  was
interrupted - the valerian had not done muchscored by deep wrinkles running parallel to the sharp
eyebrows.  The skin ofparchment and was  horrified. I said  decidedly  nothing of  whats  written
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Nick I | 15 Aug 2005 22:46
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Thanks for the help

Hi,

Thanks you everyone for submitting links about HPC related projects
and sites to Cluster Builder (http://www.clusterbuilder.org). Upon
suggestions sent by the HPC community, I added sections for Grid
middleware, end-user applications under the "Software" category and
cleaned up some sections.

I want to continue making Cluster Builder a helpful research tool for
HPC related information. So I'd like to know, based upon your
experience, if there are any other important components you run on
your cluster that I failed to note, or are there changes you would
make in how I listed the applications.

Please go ahead and respond to this email in the user list so that
others can give their opinions as well. Links that you mention in the
user list I will be sure to include on Cluster Builder.

Thanks for the help,
Nick
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Marko Lerota | 17 Aug 2005 15:57
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mail cluster with rsync

What do you think about rsync. Is it fast enough for 
2000 mail users? I want to do this few times a day: 

***********     rsync /mail partition     ************
*   MX1   * ----------------------------- *   MX2    *
***********                               ************

The MTA is qmail with Maildir format, but have also spamassasin and
clamav with qscan, so antivir will chew up some CPU. I dont have 
external storage.

First one (MX1) is ment to be LDA and POP3 toaster. The second (MX2)
only SMTP for local networks, but if MX1 stops MX2 have to take 
the control. The hardware will be with 2xCPU new Xeon processors.

--

-- 
One cannot sell the earth upon which the people walk
                               			Tacunka Witco 

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Gabriel Ambuehl | 17 Aug 2005 16:02
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Re: mail cluster with rsync

Marko Lerota wrote:

>What do you think about rsync. Is it fast enough for 
>2000 mail users? I want to do this few times a day: 
>
>***********     rsync /mail partition     ************
>*   MX1   * ----------------------------- *   MX2    *
>***********                               ************
>
>
>The MTA is qmail with Maildir format, but have also spamassasin and
>clamav with qscan, so antivir will chew up some CPU. I dont have 
>external storage.
>
>  
>

It should be good enough for 2000 mail users (I can sync a machine with
about 700000 messages on it in less than an hour over 100mbit, it'd be
much faster even if there were SCSI disks in them). It kinda depends
MOSTLY many mails the hoard in their maildirs and how many new ones you get.

By any means, rsync will put barely noticeable load on your system
compared to spamassassin and clamav.

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Bejoy Abraham Mathews | 17 Aug 2005 17:03

About Dansguardian...

Hi all

I am struggling to run Dansguardian software on a cluster. Could you help
me ifind out the best way to do so. MPICH is completely setup and runs
perfect for C based applications like PI calculation etc. The basic
problem that I face with MPICH is that it requires all the clients to run
Dansguardian. It itself uses CPU heavily when requests come in from many
clients when they access the proxy. Then when one is running the process
seperately on all the nodes it is difficult. This is one problem. The
second is that, when I start it on the server instead of running on all
the nodes, it only runs on only one first free node it comes
across(normally the first in list)and doesn't run on any either at that
time or in future. There is NIL load balancing over the network.

What I need is one Dansguardian software running on one machine and that
load being shared by other nodes in the network. Something like an SSI
cluster. But this is easily done in Linux. But the production machine is
live and active on FreeBSD and it does many other services as well. If
this Dansguardian could be set apart through clustering for the FreeBSD it
would be really a gr8 help.

Could anyone help me out with this? :-(

Thank you in advance...
With Regards
Bejoy

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