| Author | Messages | |
MThommes
Posts:73
 | | 04/05/2006 2:26 AM |
| Can someone tell me what happens with DFS/replication when a file is
updated on one DFS server and a client has that same file open on
another DFS server?
TIA!
Mike Thommes
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| mkline
Posts:16
| | 04/05/2006 2:45 AM |
| | Message body was not found. | | | |
| tvanderkooi
Posts:15
| | 04/05/2006 3:02 AM |
| If running DFS on R2 the last write wins, but the first
write is put into the Conflict and Deleted folder on the server, so that it can
be retrieved if necessary, depending on available space, quotas,
etc.
HTH,
Tim
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of mike
klineSent: Wednesday, April 05, 2006 9:43 AMTo:
ActiveDir@xxxxxxxxxxxxxxxxxxSubject: Re: [ActiveDir] 2003 DFS/open
files
The person that saves the file last will win. So the last write will
win. Take a look at this article for more info
http://support.microsoft.com/?kbid=221089
Thanks
Mike
On 4/5/06, Thommes,
Michael M.
wrote:
Can
someone tell me what happens with DFS/replication when a file isupdated on
one DFS server and a client has that same file open on another DFS
server?TIA!Mike ThommesList info : http://www.activedir.org/List.aspxList
FAQ : http://www.activedir.org/ListFAQ.aspx
List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ | | | |
| AD000001270
Posts:0
| | 04/05/2006 7:07 AM |
| The client will continue to
have the file open but depends on what action they take next...if they close the
file..nothing.
If they save the file, the last write is
going to win and possibly replace the changes that were made on the file saved
previously that the user may not be aware of.
The work around for this issue really
depends on the structure of your DFS environment, I tend to use DFS-R to just
replicate data and disable referrals to that backup server so that doesn't
happened.
Depends on exactly how your using it I
guess...
Ion V.
Gott
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx on
behalf of Thommes, Michael M.Sent: Wed 4/5/2006 7:25 AMTo:
ActiveDir@xxxxxxxxxxxxxxxxxxSubject: [ActiveDir] 2003 DFS/open
files
Can someone tell me what happens with DFS/replication when a
file isupdated on one DFS server and a client has that same file open
onanother DFS server?TIA!Mike ThommesList info :
http://www.activedir.org/List.aspxList
FAQ : http://www.activedir.org/ListFAQ.aspxList
archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ | | | |
| lists1
Posts:4
| | 04/05/2006 9:07 AM |
| I guess it also depends on the application he's using to
open the file and when it's written by the other (before or after
replication).
If the file is replicated between the servers before the
first user is closing (saving) the file, and the application is able to handle
it, it will inform the user that there's a different version of the file on the
server and offer him to reload. But apps which are doing this are pretty
rare.
Gruesse - Sincerely,
Ulf B. Simon-Weidner
MVP-Book "Windows XP - Die Expertentipps":
http://tinyurl.com/44zcz Weblog:
http://msmvps.org/UlfBSimonWeidner Website: http://www.windowsserverfaq.org Profile: http://mvp.support.microsoft.com/profile="">
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Tim Vander
KooiSent: Wednesday, April 05, 2006 5:00 PMTo:
ActiveDir@xxxxxxxxxxxxxxxxxxSubject: RE: [ActiveDir] 2003 DFS/open
files
If running DFS on R2 the last write wins, but the first
write is put into the Conflict and Deleted folder on the server, so that it
can be retrieved if necessary, depending on available space, quotas,
etc.
HTH,
Tim
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of mike
klineSent: Wednesday, April 05, 2006 9:43 AMTo:
ActiveDir@xxxxxxxxxxxxxxxxxxSubject: Re: [ActiveDir] 2003 DFS/open
files
The person that saves the file last will win. So the last write
will win. Take a look at this article for more info
http://support.microsoft.com/?kbid=221089
Thanks
Mike
On 4/5/06, Thommes,
Michael M.
wrote:
Can
someone tell me what happens with DFS/replication when a file isupdated
on one DFS server and a client has that same file open on another DFS
server?TIA!Mike ThommesList info : http://www.activedir.org/List.aspxList
FAQ : http://www.activedir.org/ListFAQ.aspx
List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ | | | |
| MThommes
Posts:73
| | 04/06/2006 6:51 AM |
| Maybe I need to describe my environment a
little more¦we have 3 file servers that have a common file structure with
one server holding a master directory structure that is copied to both itself
(with xcopy) and to the other two servers with robocopy. To ensure that a
file actually does get copied, via a daily scheduled job we need to stop the
server service and kick off each of the current user connections (net session
\\computer_name_here /delete) to make sure no one has a file open before the
xcopy/robocopy process starts. Note each of these users will only have a
particular file(s) open for read access.
With the latest DFS process using dynamic
file replication (yes, I know we can schedule the replication times), I wonder
what would happen when a file is updated and a user still has it open. Hope
this explanation makes things a little clearer.
Mike Thommes
From:
ActiveDir-owner@xxxxxxxxxxxxxxxxxx [mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Ion Gott
Sent: Wednesday, April 05, 2006
2:01 PM
To: ActiveDir@xxxxxxxxxxxxxxxxxx; ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: RE: [ActiveDir] 2003
DFS/open files
The client will continue to have the file
open but depends on what action they take next...if they close the
file..nothing.
If they save the file, the last write is going to win and
possibly replace the changes that were made on the file saved previously that
the user may not be aware of.
The work around for this issue really depends on the
structure of your DFS environment, I tend to use DFS-R to just replicate data
and disable referrals to that backup server so that doesn't happened.
Depends on exactly how your using it I guess...
Ion V. Gott
From:
ActiveDir-owner@xxxxxxxxxxxxxxxxxx on behalf of Thommes, Michael M.
Sent: Wed 4/5/2006 7:25 AM
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: [ActiveDir] 2003 DFS/open
files
Can
someone tell me what happens with DFS/replication when a file is
updated on one DFS server and a client has that same file open on
another DFS server?
TIA!
Mike Thommes
List info : http://www.activedir.org/List.aspx
List FAQ : http://www.activedir.org/ListFAQ.aspx
List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ | | | |
| Steven.Comeau@xxxx.yyy
| | 04/06/2006 7:28 AM |
| This is a good question and I hope it gets answered. We have 20 sites and
want to put servers out there and possibly do DFS w/replication to keep
main copies at the HQ for backup purposes, but I am afraid of changes to a
single file that is opened at several sites. I was considering WAN
Accelerators/WAN Cache devices that negotiate the file locks, etc., that
makes the file appear it is only open at the HQ file server. Anyone have
experience with these type of devices?
Steven Comeau
Sr. Director of IT
Community Options
16 Farber Road
Princeton, NJ 08540
EMail: Steven.Comeau@xxxxxxxxx
Phone: 609-951-9900 x114
FAX: (609) 919-3889
www.comop.org
Give the gift of flowers http://www.Vaseful.com.
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| aricbernard
Posts:2
| | 04/06/2006 9:19 AM |
| There is no disturbed locking mechanism built into DFS/R. If a file is
open, typically it will not get replicated. If the same file is open in
two different locations the last write will win, although DFSR by
default will store any of these "conflicts" in a folder just in case.
DFS/R is great if you are distributing read-only content or content that
is modified in one place (or more if coordinated) and requires alternate
locations for reading/writing/backup.
If you need to distribute files for read and write to multiple locations
then you need to leverage a central file store or a wide area file
system (WAFS) that provides a distributed locking mechanism. Most true
WAN Accelerators (Riverbed) *do not* do this. I have had some limited
experience with Tacit and Brocade who both provide viable WAFS solutions
that integrate well with W2K3R2.
Aric
-----Original Message-----
From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Steven Comeau
Sent: Thursday, April 06, 2006 12:16 PM
To: ActiveDir@xxxxxxxxxxxxxxxxxx
Cc: ActiveDir@xxxxxxxxxxxxxxxxxx
Subject: Re: [ActiveDir] 2003 DFS/open files
This is a good question and I hope it gets answered. We have 20 sites
and
want to put servers out there and possibly do DFS w/replication to keep
main copies at the HQ for backup purposes, but I am afraid of changes to
a
single file that is opened at several sites. I was considering WAN
Accelerators/WAN Cache devices that negotiate the file locks, etc., that
makes the file appear it is only open at the HQ file server. Anyone
have
experience with these type of devices?
Steven Comeau
Sr. Director of IT
Community Options
16 Farber Road
Princeton, NJ 08540
EMail: Steven.Comeau@xxxxxxxxx
Phone: 609-951-9900 x114
FAX: (609) 919-3889
www.comop.org
Give the gift of flowers http://www.Vaseful.com.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This message is intended for the use of the individual or entity to
which
it is addressed and may contain information that is privileged,
confidential and exempt from disclosure under applicable law. If the
reader of this message is not the intended recipient or the employee or
agent responsible for delivering the message to the intended recipient,
you are hereby notified that any distribution or copying of the
communication is strictly prohibited. If you have received this
communication in error, please notify us immediately by e-mail and
return
the original message to us at this e-mail address. Thank you for your
cooperation in supporting confidentiality.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
List info : http://www.activedir.org/List.aspx
List FAQ : http://www.activedir.org/ListFAQ.aspx
List archive:
http://www.mail-archive.com/activedir%40mail.activedir.org/
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| Steven.Comeau@xxxx.yyy
| | 04/07/2006 6:33 AM |
| Thank you. That is what I suspected. I visited Tacit (advantage of being
in NJ) and I agree that it appears to be the only solution that might work
well with Win2k3. Having no experience in the area, I appreciated your
insight.
ActiveDir@xxxxxxxxxxxxxxxxxx on Thursday, April 06, 2006 at 3:17 PM -0500
wrote:
>There is no disturbed locking mechanism built into DFS/R. If a file is
>open, typically it will not get replicated. If the same file is open in
>two different locations the last write will win, although DFSR by
>default will store any of these "conflicts" in a folder just in case.
>DFS/R is great if you are distributing read-only content or content that
>is modified in one place (or more if coordinated) and requires alternate
>locations for reading/writing/backup.
>
>If you need to distribute files for read and write to multiple locations
>then you need to leverage a central file store or a wide area file
>system (WAFS) that provides a distributed locking mechanism. Most true
>WAN Accelerators (Riverbed) *do not* do this. I have had some limited
>experience with Tacit and Brocade who both provide viable WAFS solutions
>that integrate well with W2K3R2.
>
>
>Aric
>
>-----Original Message-----
>From: ActiveDir-owner@xxxxxxxxxxxxxxxxxx
>[mailto:ActiveDir-owner@xxxxxxxxxxxxxxxxxx] On Behalf Of Steven Comeau
>Sent: Thursday, April 06, 2006 12:16 PM
>To: ActiveDir@xxxxxxxxxxxxxxxxxx
>Cc: ActiveDir@xxxxxxxxxxxxxxxxxx
>Subject: Re: [ActiveDir] 2003 DFS/open files
>
>This is a good question and I hope it gets answered. We have 20 sites
>and
>want to put servers out there and possibly do DFS w/replication to keep
>main copies at the HQ for backup purposes, but I am afraid of changes to
>a
>single file that is opened at several sites. I was considering WAN
>Accelerators/WAN Cache devices that negotiate the file locks, etc., that
>makes the file appear it is only open at the HQ file server. Anyone
>have
>experience with these type of devices?
>
>Steven Comeau
>Sr. Director of IT
>Community Options
>16 Farber Road
>Princeton, NJ 08540
>EMail: Steven.Comeau@xxxxxxxxx
>Phone: 609-951-9900 x114
>FAX: (609) 919-3889
>www.comop.org
>
>Give the gift of flowers http://www.Vaseful.com.
>
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>This message is intended for the use of the individual or entity to
>which
>it is addressed and may contain information that is privileged,
>confidential and exempt from disclosure under applicable law. If the
>reader of this message is not the intended recipient or the employee or
>agent responsible for delivering the message to the intended recipient,
>you are hereby notified that any distribution or copying of the
>communication is strictly prohibited. If you have received this
>communication in error, please notify us immediately by e-mail and
>return
>the original message to us at this e-mail address. Thank you for your
>cooperation in supporting confidentiality.
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>
>List info : http://www.activedir.org/List.aspx
>List FAQ : http://www.activedir.org/ListFAQ.aspx
>List archive:
>http://www.mail-archive.com/activedir%40mail.activedir.org/
>List info : http://www.activedir.org/List.aspx
>List FAQ : http://www.activedir.org/ListFAQ.aspx
>List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/
>
Steven Comeau
Sr. Director of IT
Community Options
16 Farber Road
Princeton, NJ 08540
EMail: Steven.Comeau@xxxxxxxxx
Phone: 609-951-9900 x114
FAX: (609) 919-3889
www.comop.org
Give the gift of flowers http://www.Vaseful.com.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
This message is intended for the use of the individual or entity to which
it is addressed and may contain information that is privileged,
confidential and exempt from disclosure under applicable law. If the
reader of this message is not the intended recipient or the employee or
agent responsible for delivering the message to the intended recipient,
you are hereby notified that any distribution or copying of the
communication is strictly prohibited. If you have received this
communication in error, please notify us immediately by e-mail and return
the original message to us at this e-mail address. Thank you for your
cooperation in supporting confidentiality.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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List FAQ : http://www.activedir.org/ListFAQ.aspx
List archive: http://www.mail-archive.com/activedir%40mail.activedir.org/ | | | |
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