SDS question
Question: with IDS 11.50 SDS (shared-disk secondaries) on Solaris, restarting the primary forces all SDS secondaries offline, unlike HDR where the secondary stays up. Answers explain this is by design: SDS nodes share the disk and all read the logs, so if the primary restarts and runs startup recovery the secondaries must shut down. The workaround given (Madison Pruet, echoed by Art Kagel and Nilesh Ozarkar) is to switch roles instead of simply restarting: run 'onmode -d make primary' on an SDS node to promote it, restart the old primary (it comes up as an SDS secondary), then move the primary role back with 'onmode -d make primary'. That avoids recovery and keeps the cluster online. Art also questioned the need for weekly restarts.
Auto-generated by DrWatson from the posts below — may be imperfect; read the full thread.
Hi all, currently if the primary server is re-started, all SDS servers are automatically brought offline and need to be re-started. Does anyone know of a way to keep secondary servers online in case primary goes down. (IDS 11.50 FC4, SunOS 5.10) Thank you, Ljiljana Zivanovic This e-mail contains information some or all of which may be confidential, proprietary and/or legally privileged. If an addressing or transmission error has misdirected this e-mail, please notify the sender by replying to this e-mail. If you are not the intended recipient you must not use, disclose, distribute, copy, print or rely on this e-mail. If you have any queries, or if you no longer wish to receive email in accordance with the Act on Regulation of the Transmission of Specified Electronic Mail, please contact the sender of this email.
If the primary goes down you would promote one of the SDS secondaries to an HDR primary. Art Art S. Kagel Oninit (www.oninit.com) IIUG Board of Directors (art@iiug.org) Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on my employer, Oninit, the IIUG, nor any other organization with which I am associated either explicitly or implicitly. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves. On Thu, Sep 10, 2009 at 1:06 PM, Ljiljana Zivanovic <ljiljana@mizuhocap.com>wrote: > Hi all, > > currently if the primary server is re-started, all SDS servers are > automatically brought offline and need to be re-started. > Does anyone know of a way to keep secondary servers online in case > primary goes down. > > (IDS 11.50 FC4, SunOS 5.10) > > Thank you, > Ljiljana Zivanovic > > This e-mail contains information some or all of which may be confidential, > proprietary and/or legally privileged. If an addressing or transmission > error > has misdirected this e-mail, please notify the sender by replying to this > e-mail. If you are not the intended recipient you must not use, disclose, > distribute, copy, print or rely on this e-mail. > > If you have any queries, or if you no longer wish to receive email in > accordance with the Act on Regulation of the Transmission of Specified > Electronic Mail, please contact the sender of this email. > > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. > > --002354530928c331e904733c429e
Run 'onmode -d make primary..." on one of the SDS nodes and then bring =
up
the old primary as an SDS secondary. After it is up and running, you c=
an
run "onmode -d make primary" on the old primary.
M.P.
=
"Ljiljana =
Zivanovic" =
<ljiljana@mizuhoc =
To
ap.com> ids@iiug.org =
Sent by: =
cc
ids-bounces@iiug. =
org Subj=
ect
SDS question [16938] =
=
09/10/2009 12:06 =
PM =
=
=
Please respond to =
ids@iiug.org =
=
=
Hi all,
currently if the primary server is re-started, all SDS servers are
automatically brought offline and need to be re-started.
Does anyone know of a way to keep secondary servers online in case
primary goes down.
(IDS 11.50 FC4, SunOS 5.10)
Thank you,
Ljiljana Zivanovic
This e-mail contains information some or all of which may be confidenti=
al,
proprietary and/or legally privileged. If an addressing or transmission=
error
has misdirected this e-mail, please notify the sender by replying to th=
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e,
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If primary server goes down, then you should promote one of the SDS ser= ver to be a new primary, and other SDS servers will connect to the new prim= ary automatically. Then (if needed), you can restart the old primary as an = SDS server provided you have the SDS parameters set in its onconfig file. T= his way you will have continuos availability and SDS server won't have to b= e restarted. Regards, Nilesh ids-bounces@iiug.org wrote on 09/10/2009 12:06:30 PM: > [image removed] > > SDS question [16938] > > Ljiljana Zivanovic > > to: > > ids > > 09/10/2009 12:07 PM] > > Sent by: > > ids-bounces@iiug.org > > Please respond to ids > > Hi all, > > currently if the primary server is re-started, all SDS servers are > automatically brought offline and need to be re-started. > Does anyone know of a way to keep secondary servers online in case > primary goes down. > > (IDS 11.50 FC4, SunOS 5.10) > > Thank you, > Ljiljana Zivanovic > > This e-mail contains information some or all of which may be confidential, > proprietary and/or legally privileged. If an addressing or transmissi= on error > has misdirected this e-mail, please notify the sender by replying to = this > e-mail. If you are not the intended recipient you must not use, discl= ose, > distribute, copy, print or rely on this e-mail. > > If you have any queries, or if you no longer wish to receive email in= > accordance with the Act on Regulation of the Transmission of Specifie= d > Electronic Mail, please contact the sender of this email. > > > ***********************************************************************= ******** > Forum Note: Use "Reply" to post a response in the discussion forum.= >=
My question was - if primary in SDS pair is restarted (e.g. weekly
reboot) is there a way for me to prevent secondary shutting down as
well.
At this moment, I don't want to promote my secondary server to
primary. It's just regular instance restart, but as primary is
restarting I would like secondary staying online.
As in HDR pair, if primary instance is restarted, secondary stays up
and running and after oninit on primary they reconnect.
Thanks,
Ljiljana
Art Kagel wrote:
If the primary goes down you would promote one of the SDS secondaries to an
HDR primary.
Art
Art S. Kagel
Oninit ([1]www.oninit.com)
IIUG Board of Directors ([2]art@iiug.org)
Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Oninit, the IIUG, nor any other organization
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any entity
with which I am affiliated nor those of the entities themselves.
On Thu, Sep 10, 2009 at 1:06 PM, Ljiljana Zivanovic
[3]<ljiljana@mizuhocap.com>wrote:
Hi all,
currently if the primary server is re-started, all SDS servers are
automatically brought offline and need to be re-started.
Does anyone know of a way to keep secondary servers online in case
primary goes down.
(IDS 11.50 FC4, SunOS 5.10)
Thank you,
Ljiljana Zivanovic
This e-mail contains information some or all of which may be confidential,
proprietary and/or legally privileged. If an addressing or transmission
error
has misdirected this e-mail, please notify the sender by replying to this
e-mail. If you are not the intended recipient you must not use, disclose,
distribute, copy, print or rely on this e-mail.
If you have any queries, or if you no longer wish to receive email in
accordance with the Act on Regulation of the Transmission of Specified
Electronic Mail, please contact the sender of this email.
*******************************************************************************
Forum Note: Use "Reply" to post a response in the discussion forum.
--002354530928c331e904733c429e
*******************************************************************************
Forum Note: Use "Reply" to post a response in the discussion forum.
This e-mail contains information some or all of which may be confidential, prop
rietary and/or legally privileged. If an addressing or transmission error has
misdirected this e-mail, please notify the sender by replying to this e-mail.
If you are not the intended recipient you must not use, disclose, distribute, c
opy, print or rely on this e-mail.
If you have any queries, or if you no longer wish to receive email in accordanc
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References
1. http://www.oninit.com/
2. mailto:art@iiug.org
3. mailto:ljiljana@mizuhocap.com
Why are you shutting down and restarting the primary server every week?
I've had IDS servers that stay online for years without any problems or
concerns.
Art
Art S. Kagel
Oninit (www.oninit.com)
IIUG Board of Directors (art@iiug.org)
Disclaimer: Please keep in mind that my own opinions are my own opinions and
do not reflect on my employer, Oninit, the IIUG, nor any other organization
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any entity
with which I am affiliated nor those of the entities themselves.
On Thu, Sep 10, 2009 at 2:23 PM, Ljiljana Zivanovic
<ljiljana@mizuhocap.com>wrote:
> My question was - if primary in SDS pair is restarted (e.g. weekly
>
> reboot) is there a way for me to prevent secondary shutting down as
>
> well.
>
> At this moment, I don't want to promote my secondary server to
>
> primary. It's just regular instance restart, but as primary is
>
> restarting I would like secondary staying online.
>
> As in HDR pair, if primary instance is restarted, secondary stays up
>
> and running and after oninit on primary they reconnect.
>
> Thanks,
>
> Ljiljana
>
> Art Kagel wrote:
>
> If the primary goes down you would promote one of the SDS secondaries to an
>
> HDR primary.
>
> Art
>
> Art S. Kagel
>
> Oninit ([1]www.oninit.com)
>
> IIUG Board of Directors ([2]art@iiug.org)
>
> Disclaimer: Please keep in mind that my own opinions are my own opinions
> and
>
> do not reflect on my employer, Oninit, the IIUG, nor any other organization
>
> with which I am associated either explicitly or implicitly. Neither do
>
> those opinions reflect those of other individuals affiliated with any
> entity
>
> with which I am affiliated nor those of the entities themselves.
>
> On Thu, Sep 10, 2009 at 1:06 PM, Ljiljana Zivanovic
>
> [3]<ljiljana@mizuhocap.com>wrote:
>
> Hi all,
>
> currently if the primary server is re-started, all SDS servers are
>
> automatically brought offline and need to be re-started.
>
> Does anyone know of a way to keep secondary servers online in case
>
> primary goes down.
>
> (IDS 11.50 FC4, SunOS 5.10)
>
> Thank you,
>
> Ljiljana Zivanovic
>
> This e-mail contains information some or all of which may be confidential,
>
> proprietary and/or legally privileged. If an addressing or transmission
>
> error
>
> has misdirected this e-mail, please notify the sender by replying to this
>
> e-mail. If you are not the intended recipient you must not use, disclose,
>
> distribute, copy, print or rely on this e-mail.
>
> If you have any queries, or if you no longer wish to receive email in
>
> accordance with the Act on Regulation of the Transmission of Specified
>
> Electronic Mail, please contact the sender of this email.
>
>
>
>
*******************************************************************************
>
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
> --002354530928c331e904733c429e
>
>
>
>
*******************************************************************************
>
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
> This e-mail contains information some or all of which may be confidential,
> prop
>
> rietary and/or legally privileged. If an addressing or transmission error
> has
>
> misdirected this e-mail, please notify the sender by replying to this
> e-mail.
>
> If you are not the intended recipient you must not use, disclose,
> distribute,
> c
>
> opy, print or rely on this e-mail.
>
> If you have any queries, or if you no longer wish to receive email in
> accordanc
>
> e with the Act on Regulation of the Transmission of Specified Electronic
> Mail,
>
> please contact the sender of this email.
>
> References
>
> 1. http://www.oninit.com/
>
> 2. mailto:art@iiug.org
>
> 3. mailto:ljiljana@mizuhocap.com
>
>
>
>
*******************************************************************************
> Forum Note: Use "Reply" to post a response in the discussion forum.
>
>
--002354530928ade34304733dd0dc
With SDS - all of the servers are processing the logs. If the primary
should fail and you simply restart it, then you will run into problems
because the primary will have to go through recovery. You need to
continue the original process. That means you need to first make one o=
f
the remaining SDS nodes primary by running "onmode -d make primary". T=
hen
when you restart the original primary, you would first need to start it=
as
a secondary - which it would be by simply starting it. Then you would
retransition the role of primary back to the original primary by again
running onmode -d make primary....
M.P.
=
"Ljiljana =
Zivanovic" =
<ljiljana@mizuhoc =
To
ap.com> ids@iiug.org =
Sent by: =
cc
ids-bounces@iiug. =
org Subj=
ect
Re: SDS question [16942] =
=
09/10/2009 01:23 =
PM =
=
=
Please respond to =
ids@iiug.org =
=
=
My question was - if primary in SDS pair is restarted (e.g. weekly
reboot) is there a way for me to prevent secondary shutting down as
well.
At this moment, I don't want to promote my secondary server to
primary. It's just regular instance restart, but as primary is
restarting I would like secondary staying online.
As in HDR pair, if primary instance is restarted, secondary stays up
and running and after oninit on primary they reconnect.
Thanks,
Ljiljana
Art Kagel wrote:
If the primary goes down you would promote one of the SDS secondaries t=
o an
HDR primary.
Art
Art S. Kagel
Oninit ([1]www.oninit.com)
IIUG Board of Directors ([2]art@iiug.org)
Disclaimer: Please keep in mind that my own opinions are my own opinion=
s
and
do not reflect on my employer, Oninit, the IIUG, nor any other organiza=
tion
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any
entity
with which I am affiliated nor those of the entities themselves.
On Thu, Sep 10, 2009 at 1:06 PM, Ljiljana Zivanovic
[3]<ljiljana@mizuhocap.com>wrote:
Hi all,
currently if the primary server is re-started, all SDS servers are
automatically brought offline and need to be re-started.
Does anyone know of a way to keep secondary servers online in case
primary goes down.
(IDS 11.50 FC4, SunOS 5.10)
Thank you,
Ljiljana Zivanovic
This e-mail contains information some or all of which may be confidenti=
al,
proprietary and/or legally privileged. If an addressing or transmission=
error
has misdirected this e-mail, please notify the sender by replying to th=
is
e-mail. If you are not the intended recipient you must not use, disclos=
e,
distribute, copy, print or rely on this e-mail.
If you have any queries, or if you no longer wish to receive email in
accordance with the Act on Regulation of the Transmission of Specified
Electronic Mail, please contact the sender of this email.
***********************************************************************=
********
Forum Note: Use "Reply" to post a response in the discussion forum.
--002354530928c331e904733c429e
***********************************************************************=
********
Forum Note: Use "Reply" to post a response in the discussion forum.
This e-mail contains information some or all of which may be confidenti=
al,
prop
rietary and/or legally privileged. If an addressing or transmission err=
or
has
misdirected this e-mail, please notify the sender by replying to this
e-mail.
If you are not the intended recipient you must not use, disclose,
distribute,
c
opy, print or rely on this e-mail.
If you have any queries, or if you no longer wish to receive email in
accordanc
e with the Act on Regulation of the Transmission of Specified Electroni=
c
Mail,
please contact the sender of this email.
References
1. http://www.oninit.com/
2. mailto:art@iiug.org
3. mailto:ljiljana@mizuhocap.com
***********************************************************************=
********
Forum Note: Use "Reply" to post a response in the discussion forum.
=
Guess I need to explain just a bit better....
We need to prevent recovery from happening in order to not have to shut=
down all of the SDS servers. If recovery should happen then the SDS no=
des
will be forced to shut down. By switching the role of primary from one=
node to another node, even just for a short period of time, then we don=
't
have to go through the startup recovery phase.
So if you have two nodes A, and B, and A and B are sharing the same dis=
k
system, then the process if A should fail would be.
1) make B into primary (onmode -d make primary....XXX_B)
2) bring up A (it will automatically come up as an SDS secondary)
3) Make A back into the primary (onmode -d make primary ... XXX_A)
That way no server will be forced to go into startup recovery.
M.P.
=
Madison =
Pruet/Dallas/IBM@ =
IBMUS =
To
Sent by: ids@iiug.org =
ids-bounces@iiug. =
cc
org =
Subj=
ect
Re: SDS question [16944] =
09/10/2009 02:16 =
PM =
=
=
Please respond to =
ids@iiug.org =
=
=
With SDS - all of the servers are processing the logs. If the primary
should fail and you simply restart it, then you will run into problems
because the primary will have to go through recovery. You need to
continue the original process. That means you need to first make one o=3D=
f
the remaining SDS nodes primary by running "onmode -d make primary". T=3D=
hen
when you restart the original primary, you would first need to start it=
=3D
as
a secondary - which it would be by simply starting it. Then you would
retransition the role of primary back to the original primary by again
running onmode -d make primary....
M.P.
=3D
"Ljiljana =3D
Zivanovic" =3D
<ljiljana@mizuhoc =3D
To
ap.com> ids@iiug.org =3D
Sent by: =3D
cc
ids-bounces@iiug. =3D
org Subj=3D
ect
Re: SDS question [16942] =3D
=3D
09/10/2009 01:23 =3D
PM =3D
=3D
=3D
Please respond to =3D
ids@iiug.org =3D
=3D
=3D
My question was - if primary in SDS pair is restarted (e.g. weekly
reboot) is there a way for me to prevent secondary shutting down as
well.
At this moment, I don't want to promote my secondary server to
primary. It's just regular instance restart, but as primary is
restarting I would like secondary staying online.
As in HDR pair, if primary instance is restarted, secondary stays up
and running and after oninit on primary they reconnect.
Thanks,
Ljiljana
Art Kagel wrote:
If the primary goes down you would promote one of the SDS secondaries t=
=3D
o an
HDR primary.
Art
Art S. Kagel
Oninit ([1]www.oninit.com)
IIUG Board of Directors ([2]art@iiug.org)
Disclaimer: Please keep in mind that my own opinions are my own opinion=
=3D
s
and
do not reflect on my employer, Oninit, the IIUG, nor any other organiza=
=3D
tion
with which I am associated either explicitly or implicitly. Neither do
those opinions reflect those of other individuals affiliated with any
entity
with which I am affiliated nor those of the entities themselves.
On Thu, Sep 10, 2009 at 1:06 PM, Ljiljana Zivanovic
[3]<ljiljana@mizuhocap.com>wrote:
Hi all,
currently if the primary server is re-started, all SDS servers are
automatically brought offline and need to be re-started.
Does anyone know of a way to keep secondary servers online in case
primary goes down.
(IDS 11.50 FC4, SunOS 5.10)
Thank you,
Ljiljana Zivanovic
This e-mail contains information some or all of which may be confidenti=
=3D
al,
proprietary and/or legally privileged. If an addressing or transmission=
=3D
error
has misdirected this e-mail, please notify the sender by replying to th=
=3D
is
e-mail. If you are not the intended recipient you must not use, disclos=
=3D
e,
distribute, copy, print or rely on this e-mail.
If you have any queries, or if you no longer wish to receive email in
accordance with the Act on Regulation of the Transmission of Specified
Electronic Mail, please contact the sender of this email.
***********************************************************************=
=3D
********
Forum Note: Use "Reply" to post a response in the discussion forum.
--002354530928c331e904733c429e
***********************************************************************=
=3D
********
Forum Note: Use "Reply" to post a response in the discussion forum.
This e-mail contains information some or all of which may be confidenti=
=3D
al,
prop
rietary and/or legally privileged. If an addressing or transmission err=
=3D
or
has
misdirected this e-mail, please notify the sender by replying to this
e-mail.
If you are not the intended recipient you must not use, disclose,
distribute,
c
opy, print or rely on this e-mail.
If you have any queries, or if you no longer wish to receive email in
accordanc
e with the Act on Regulation of the Transmission of Specified Electroni=
=3D
c
Mail,
please contact the sender of this email.
References
1. http://www.oninit.com/
2. mailto:art@iiug.org
3. mailto:ljiljana@mizuhocap.com
***********************************************************************=
=3D
********
Forum Note: Use "Reply" to post a response in the discussion forum.
=3D
***********************************************************************=
********
Forum Note: Use "Reply" to post a response in the discussion forum.
=