SUMMARY: nfs mounted /var/spool/mail

Gautam Das (gautam@bwc.org)
Tue, 02 Dec 1997 20:38:49 +0200

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Thanks to all to answered. Majority said its perfectly okay to nfs mount
/var/spool/mail. They have been doing it for years.

You just need to make sure the mount is hard and actimeo=0.

Answers are attached.

-- 
Gautam

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Return-path: <rick@lunger.llnl.gov> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA10640 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 19:18:46 +0200 Received: from lunger.llnl.gov by qudrat.bwc.org with SMTP id AA14137 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 19:18:56 +0200 Received: (from rick@localhost) by lunger.llnl.gov (8.8.6/LLNL-3.0.2) id JAA03155 for gautam@bwc.org; Tue, 2 Dec 1997 09:16:23 -0800 (PST) Date: Tue, 2 Dec 1997 09:16:23 -0800 (PST) From: Rick Reineman <rick@lunger.llnl.gov> Subject: Re: nfs mounted /var/spool/mail To: gautam@bwc.org Message-id: <199712021716.JAA03155@lunger.llnl.gov> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Sun-Charset: US-ASCII

I always mount mail. Make sure you do not do a soft mount. The mount options should be: -rw,hard,intr,nosuid

Don't cache mount mail either.

You can also change your sendmail.cf on the clients to receive mail on the server, instead of their workststion. As the server tends to be more stable there is less missed mail, as when a workststion is down for some reason, or has changed names.

Rick ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Rick Reineman Lasers CAD&UNIX Systems Management Lawrence Livermore National Laboratory reineman1@llnl.gov

> From sun-managers-relay@ra.mcs.anl.gov Tue Dec 2 03:16 PST 1997 > Sender: sun-managers-relay@ra.mcs.anl.gov > Date: Tue, 02 Dec 1997 11:51:18 +0200 > From: Gautam Das <gautam@bwc.org> > To: Sun Managers List <sun-managers@ra.mcs.anl.gov> > Subject: nfs mounted /var/spool/mail > Content-Transfer-Encoding: 7bit > > Is there a chance of flakiness if /var/spool/mail is nfs mounted? > Any known problems? > > Clients are SunOS 4.1.3 , NFS servers are 4.1.3 and Solaris 2.6. > > Thanks, > > Gautam >

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Return-path: <benji@hnt.com> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA10635 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 19:18:35 +0200 Received: from columbus.hnt.com by qudrat.bwc.org with SMTP id AA14136 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 19:18:47 +0200 Received: from localhost (benji@localhost) by columbus.hnt.com (8.8.5/8.8.5/HnT-060997) with SMTP id MAA10634 for <gautam@bwc.org>; Tue, 2 Dec 1997 12:14:40 -0500 (EST) Date: Tue, 2 Dec 1997 12:14:40 -0500 (EST) From: Benjamin Cline <benji@hnt.com> Subject: Re: nfs mounted /var/spool/mail In-reply-to: <3483DA16.9CB700D2@bwc.org> To: Gautam Das <gautam@bwc.org> Message-id: <Pine.GSO.3.95.971202121109.9715F-100000@columbus.hnt.com> MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII

On Tue, 2 Dec 1997, Gautam Das wrote: > Is there a chance of flakiness if /var/spool/mail is nfs mounted? > Any known problems? > > Clients are SunOS 4.1.3 , NFS servers are 4.1.3 and Solaris 2.6. >

Yes, there is a good chance of flakiness. File locking over NFS has always been somewhat problematic, and I wouldn't be surprised if mixing OS version makes things worse. If your users really want to be able to read mail from a remote server with a client running on the local machine, I would suggest you install an POP or IMAP server on your mail server (personally I think IMAP is the right way to go, and POP is an abomination, but your mileage may vary) and deploy a POP/IMAP capable client like the Solstice Internet Mail Client or Netscape Communicator 4.0.

benji

--
Benjamin R. Cline       Harrison & Troxell, Inc.         benji@hnt.com
                     Quis Custodiet Ipsos Custodes?

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Return-path: <zmerch@northernway.net> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA10493 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 18:36:01 +0200 Received: from mail.northernway.net by qudrat.bwc.org with SMTP id AA13689 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 18:36:20 +0200 Received: (qmail 11271 invoked from network); 2 Dec 1997 16:42:40 -0000 Received: from zmerch.northernway.net (HELO zmerch) (208.128.145.249) by mail.northernway.net with SMTP; 2 Dec 1997 16:42:40 -0000 Date: Tue, 02 Dec 1997 11:35:51 -0500 From: Roger Merchberger <zmerch@northernway.net> Subject: Re: nfs mounted /var/spool/mail In-reply-to: <3483DA16.9CB700D2@bwc.org> X-Sender: zmerch@mail.northernway.net To: Gautam Das <gautam@bwc.org> Message-id: <3.0.3.32.19971202113551.0098d880@mail.northernway.net> MIME-version: 1.0 X-Mailer: QUALCOMM Windows Eudora Pro Version 3.0.3 (32) Content-type: text/plain; charset=us-ascii

;-) Due to massive amounts of caffeine & sleep deprivation, Gautam Das said:

>Is there a chance of flakiness if /var/spool/mail is nfs mounted? >Any known problems? > >Clients are SunOS 4.1.3 , NFS servers are 4.1.3 and Solaris 2.6.

This also depends on what MTA you're running (mail daemon... i.e. sendmail, qmail, etc.)

If you're running any type of sendmail, or if you're running qmail with _Mailbox_ support, then you definately do run the risk of corrupting mailboxes with multiple deliveries due to inadequate file locking across NFS. However, if you are running qmail with /Maildir support, then file locking is not required and it's perfectly safe to mount the mail directories (as Qmail's default is to store the user's mail directories in their own home directory) via NFS.

I'll be honest: Qmail is _not_ a direct Sendmail replacement... a few programs need to be patched to run with qmail, configuring qmail is much easier (you don't need a book, unlike sendmail) qmail has been proven perfectly secure so far (there's a $1000 reward if you can get a program to run on the machine as someone other than yourself because of qmail -- it hasn't been collected yet) and it's an order of magnatude faster than sendmail -- an Intel 486DX2/66 with 32Megs RAM, IDE hard drive, Linux and Qmail will outperform a Pentium 133 with 64Megs RAM, SCSI hard drive, Linux and sendmail... found that out myself!

I've been running a beta Qmail for 18 months with no security or any other problems -- If you want, check it out at www.qmail.org for more info.

Hope this helps, Roger "Merch" Merchberger

--
Roger Merchberger       | Why does Hershey's put nutritional
Programmer, NorthernWay | information on their candy bar wrappers
zmerch@northernway.net  | when there's no nutritional value within?

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Return-path: <cwynne@brutus.mts.jhu.edu> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA10315 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 18:26:48 +0200 Received: from brutus.mts.jhu.edu by qudrat.bwc.org with SMTP id AA13525 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 18:27:04 +0200 Received: from cassius.mts.jhu.edu (cassius.mts.jhu.edu [128.220.17.5]) by brutus.mts.jhu.edu (8.8.5/8.7.3) with ESMTP id LAA21280 for <gautam@bwc.org>; Tue, 2 Dec 1997 11:26:22 -0500 (EST) Received: (from cwynne@localhost) by cassius.mts.jhu.edu (8.8.5/8.8.5) id LAA12392; Tue, 2 Dec 1997 11:26:21 -0500 (EST) Date: Tue, 2 Dec 1997 11:26:21 -0500 (EST) From: "Colin J. Wynne" <cwynne@brutus.mts.jhu.edu> Subject: nfs mounted /var/spool/mail In-reply-to: <3483DA16.9CB700D2@bwc.org> To: Gautam Das <gautam@bwc.org> Message-id: <199712021626.LAA12392@cassius.mts.jhu.edu> MIME-version: 1.0 X-Mailer: VM 6.34 under 19.16 "Lille" XEmacs Lucid Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit References: <3483DA16.9CB700D2@bwc.org>

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>>>>> "Gautam" == Gautam Das <gautam@bwc.org> writes:

Gautam> Is there a chance of flakiness if /var/spool/mail is nfs Gautam> mounted? Any known problems?

That's how I run it for a couple of Sparc/Solaris 2.5.1 machines, and I've had no problems in over a year. I used one of the O'Reilly books as a reference when I set it up, and that pointed out making sure that the vfstab file mounts the mail directory rw,hard,noac for proper behavior. This is what I use.

Hope this helps,

CJW

- -- ********************************************************************** /\ Colin J. Wynne Johns Hopkins University (()) Dep't of Mathematical Sciences /____\ ``Lunatic-at-Large'' E-Mail: cwynne@mts.jhu.edu /______\ /________\ ``Remember, this thing [the Internet] is based on decent- ralized military software meant to withstand WWIII.'' ---(rmiller@pic.net), posted in r.a.s.t.b5 **********************************************************************

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Return-path: <sys-admin@gdc.ca> Return-receipt-to: System Administrator <sys-admin@gdc.ca> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA10138 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 17:46:23 +0200 Received: from gateway ([209.89.158.2]) by qudrat.bwc.org with SMTP id AA12872 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 17:46:37 +0200 Received: from gdc.ca (smrc [192.34.72.10]) by gateway (SMI-8.6/gdc-gw) with ESMTP id KAA03983 for <gautam@bwc.org>; Tue, 2 Dec 1997 10:33:37 -0500 Received: from mrcadm1 by gdc.ca (SMI-8.6/SMI-SVR4) id KAA18245; Tue, 2 Dec 1997 10:45:45 -0500 Received: by localhost with Microsoft MAPI; Tue, 2 Dec 1997 10:50:39 -0500 Date: Tue, 2 Dec 1997 10:50:38 -0500 From: System Administrator <sys-admin@gdc.ca> Subject: RE: nfs mounted /var/spool/mail To: "'Gautam Das'" <gautam@bwc.org> Message-id: <01BCFF10.20FC5A60.sys-admin@gdc.ca> MIME-version: 1.0 X-Mailer: Microsoft Internet E-mail/MAPI - 8.0.0.4211 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit

On Tuesday, December 02, 1997 4:51 AM, Gautam Das [SMTP:gautam@bwc.org] wrote: > Is there a chance of flakiness if /var/spool/mail is nfs mounted? > Any known problems? > > Clients are SunOS 4.1.3 , NFS servers are 4.1.3 and Solaris 2.6. > > Thanks, > > Gautam We have it mounted here... no problems, as long as in the vfstab file the entry looks like:

machine:/var/spool/mail - /var/spool/mail nfs - yes actime=0

==================================================== Patrick Patterson Tel: (514) 335-3015 x228 Network Systems Analyst Fax: (514) 335-1614 General DataComm - Multimedia Research Center E-Mail: sys-admin@gdc.ca

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Return-path: <djohnson@nbserv2.dseg.ti.com> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA10099 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 17:37:42 +0200 Received: from jester.ti.com by qudrat.bwc.org with SMTP id AA12703 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 17:38:00 +0200 Received: from mailhost.dseg.ti.com ([157.170.147.17]) by jester.ti.com (8.8.7) with ESMTP id JAA19382 for <gautam@bwc.org>; Tue, 2 Dec 1997 09:37:10 -0600 (CST) Received: from nbserv2.dseg.ti.com (nbserv2.dseg.ti.com [157.170.51.109]) by mailhost.dseg.ti.com (8.6.9/8.6.6) with SMTP id JAA20388 for <gautam@bwc.org>; Tue, 2 Dec 1997 09:37:08 -0600 Received: from mw71.dseg.ti.com by nbserv2.dseg.ti.com (4.1/SMI-4.1) id AA22252; Tue, 2 Dec 97 09:37:07 CST Received: by mw71.dseg.ti.com (SMI-8.6/SMI-SVR4) id JAA03915; Tue, 2 Dec 1997 09:37:39 -0600 Date: Tue, 2 Dec 1997 09:37:39 -0600 From: djohnson@nbserv2.dseg.ti.com (Danny Johnson) Subject: Re: nfs mounted /var/spool/mail To: gautam@bwc.org Message-id: <199712021537.JAA03915@mw71.dseg.ti.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Sun-Charset: US-ASCII

obviously you must mount it with option "hard" if you expect to avoid data loss/corruption. other than that, it should work reasonably well except for the problems caused by user root trying to write mail locally and failing because of the nfs root->nobody default conversion on NFS mounts. the fix for that it to forward root mail on all client machines to the mail server, which usually works.

> From sun-managers-relay@ra.mcs.anl.gov Tue Dec 2 05:03:47 1997 > From: Gautam Das <gautam@bwc.org> > Organization: Baha'i World Centre > X-Mailer: Mozilla 4.04 [en] (X11; I; SunOS 5.6 sun4u) > Mime-Version: 1.0 > To: Sun Managers List <sun-managers@ra.mcs.anl.gov> > Subject: nfs mounted /var/spool/mail > Content-Transfer-Encoding: 7bit > > Is there a chance of flakiness if /var/spool/mail is nfs mounted? > Any known problems? > > Clients are SunOS 4.1.3 , NFS servers are 4.1.3 and Solaris 2.6. > > Thanks, > > Gautam >

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Return-path: <roger@mudbug.ptac.com> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA9301 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 15:40:01 +0200 Received: from mudbug.ptac.com by qudrat.bwc.org with SMTP id AA10693 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 15:40:20 +0200 Received: from cheetah.ptac.com (cheetah [206.105.54.96]) by mudbug.ptac.com (8.8.6/8.8.6) with SMTP id HAA05324 for <gautam@bwc.org>; Tue, 2 Dec 1997 07:39:13 -0600 (CST) Received: by cheetah.ptac.com (SMI-8.6/SMI-SVR4) id HAA03258; Tue, 2 Dec 1997 07:39:13 -0600 Date: Tue, 2 Dec 1997 07:39:13 -0600 From: roger@ptac.com (Roger D McGraw) Subject: Re: nfs mounted /var/spool/mail To: gautam@bwc.org Message-id: <199712021339.HAA03258@cheetah.ptac.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit X-Sun-Charset: US-ASCII

We do it....no problems, Make sure you do this: actimeo=0 in the options like so: mailmachine:/var/mail - /var/mail nfs - yes hard,intr,bg,actimeo=0 Roger

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Return-path: <gibian@stars1.hanscom.af.mil> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA9057 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 15:12:21 +0200 Received: from smtpgw.hanscom.af.mil by qudrat.bwc.org with SMTP id AA10345 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 15:12:36 +0200 Received: from stars1.hanscom.af.mil by smtpgw.hanscom.af.mil (SMI-8.6/SMI-SVR4) id IAA29673; Tue, 2 Dec 1997 08:09:09 -0500 Received: from drizzle.tfs.com by stars1.hanscom.af.mil (SMI-8.6/SMI-SVR4) id IAA14037; Tue, 2 Dec 1997 08:06:09 -0500 Received: from hail.tfs.com by drizzle.tfs.com (SMI-8.6/SMI-SVR4) id IAA23727; Tue, 2 Dec 1997 08:13:25 -0500 Received: by hail.tfs.com (SMI-8.6/SMI-SVR4) id IAA16953; Tue, 2 Dec 1997 08:12:28 -0500 Date: Tue, 2 Dec 1997 08:12:28 -0500 From: gibian@stars1.hanscom.af.mil (Marc S. Gibian) Subject: Re: nfs mounted /var/spool/mail To: gautam@bwc.org Message-id: <199712021312.IAA16953@hail.tfs.com> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit Content-MD5: eMws3jt2G8gWgVTTVHyXyg==

I personally am quite uncomfortable with a mounted /var/spool/mail, but it is a very common practice. Many years ago I was the software engineer responsible for all email software for a major workstation vendor. The code for many of the programs manipulating the mail spool files was very intolerant of network issues, never checking return codes under the assumption that if the program ran at all, then the local disk (i.e. the disk hosting the mail spool) was working fine. There were race conditions that on occasion could cause a user's entire incoming messages file to be lost. In practice, this did not appear to happen.

Since, I've been administering a number of Unix systems, most recently Solaris 2.5 (and SunOS 4.1.3), and haven't seen any problems with a mounted mail spool. I DO see an occasional problem with my own email, loosing a couple of new messages every once in a while, but I think the problem is CDE 1.0.1's dtmail. For what I do, this has not be a big problem, but I think it confirms that Sun's email code base is similar to that I had maintained.

-Marc

Marc S. Gibian COMSYS Information Technology Services phone: (617) 377-6350 PRISM/TFS email: gibian@stars1.hanscom.af.mil or is it: gibian@hanscom.af.mil well, maybe: gibianm@hanscom.af.mil and if all else fails: marc.gibian@acm.org

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Return-path: <Garry.Robbins@labatt.com> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA9021 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 15:01:42 +0200 Received: from labatt.com (ns.labatt.com) by qudrat.bwc.org with SMTP id AA10169 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 15:01:53 +0200 Received: from ldn71.lboc.com by labatt.com (SMI-8.6/SMI-4.1) id IAA28779; Tue, 2 Dec 1997 08:01:10 -0500 Received: from LABATT.com by ldn71.lboc.com (SMI-8.6/SMI-SVR4) id IAA29634; Tue, 2 Dec 1997 08:01:09 -0500 Date: Tue, 02 Dec 1997 08:01:09 -0500 From: "Garry D. Robbins" <Garry.Robbins@labatt.com> Subject: Re: nfs mounted /var/spool/mail Sender: 25741@labatt.com To: Gautam Das <gautam@bwc.org> Message-id: <34840695.A5A79D92@LABATT.com> Organization: Labatt Breweries of Canada MIME-version: 1.0 X-Mailer: Mozilla 4.04 [en] (X11; U; SunOS 5.6 sun4u) Content-type: text/plain; charset=us-ascii Content-transfer-encoding: 7bit References: <3483DA16.9CB700D2@bwc.org>

No flakiness, been doing it for several years, although I've noticed the serving host wants the actimeo parameter to be set, as in:

ldn71:/var/mail - /var/mail nfs - yes actimeo=0

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Return-path: <diarra@ipno.in2p3.fr> Received: from qudrat.bwc.org ([192.115.144.2]) by bach.bwc.org (Netscape Messaging Server 3.0) with SMTP id AAA9008 for <gautam@bach.bwc.org>; Tue, 2 Dec 1997 14:58:37 +0200 Received: from ipnosb.in2p3.fr by qudrat.bwc.org with SMTP id AA10129 (5.67b-Emil1.1/IDA-1.5 for <gautam@bwc.org>); Tue, 2 Dec 1997 14:58:38 +0200 Received: from ipnsub.in2p3.fr (ipnsub [134.158.92.55]) by ipnosb.in2p3.fr (8.7.6/8.7.3) with ESMTP id NAA31987 for <gautam@bwc.org>; Tue, 2 Dec 1997 13:57:56 +0100 (MET) Received: (from diarra@localhost) by ipnsub.in2p3.fr (8.7.6/8.7.3) id NAA24305; Tue, 2 Dec 1997 13:56:04 +0100 (MET) Date: Tue, 2 Dec 1997 13:56:03 +0100 (MET) From: Christophe DIARRA <diarra@ipno.in2p3.fr> Subject: Re: nfs mounted /var/spool/mail In-reply-to: <3483DA16.9CB700D2@bwc.org> To: Gautam Das <gautam@bwc.org> Message-id: <Pine.SOL.3.91.971202135436.24295A-100000@ipnsub> MIME-version: 1.0 Content-type: TEXT/PLAIN; charset=US-ASCII

Hello,

we nfsmount /var/spool/mail on /import/mail from an AlphaServer to DECUNIX 4.0B and Solaris 2.5 clients without any problem.

You just have to setenv MAIL to be /import/mail/$USER .

Christophe.

*** Christophe DIARRA Institut de Physique Nucleaire Bat 100 - S2I 91406 ORSAY Cedex Tel: (33) 01 69 15 65 60 Fax: (33) 01 69 15 64 70 E-mail: diarra@ipno.in2p3.fr ***

On Tue, 2 Dec 1997, Gautam Das wrote:

> Is there a chance of flakiness if /var/spool/mail is nfs mounted? > Any known problems? > > Clients are SunOS 4.1.3 , NFS servers are 4.1.3 and Solaris 2.6. > > Thanks, > > Gautam >

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