I one clusternode fails. What is the procedure to reinstall the SQL software
INCLUDING SQL servicepacks? Preferrably without disturbing the remaining
node. Documents anyone ?
Also, SQL-logs, where could or should they reside ? On the same shared disk
as the db:s or on another one? Or maybe on a local disk ?
Regards
Johnny Lundgren
These are my notes with links at the end.
Nik Marshall-Blank MCSD/MCDBA
Linz, Austria
"Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
message news:C8CEA952-209A-41BF-8C85-F4473964CE62@.microsoft.com...
> Hello,
> I one clusternode fails. What is the procedure to reinstall the SQL
> software
> INCLUDING SQL servicepacks? Preferrably without disturbing the remaining
> node. Documents anyone ?
> Also, SQL-logs, where could or should they reside ? On the same shared
> disk
> as the db:s or on another one? Or maybe on a local disk ?
> Regards
> Johnny Lundgren
begin 666 Cluster.doc
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`
end
|||Hello Nick,
I think you forgot to post the links..?
Regards
Johnny Lundgren
"Nik Marshall-Blank" wrote:
> These are my notes with links at the end.
> --
> Nik Marshall-Blank MCSD/MCDBA
> Linz, Austria
> "Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
> message news:C8CEA952-209A-41BF-8C85-F4473964CE62@.microsoft.com...
>
>
|||They are the blue hyperlinks in the word document I attached (last page).
Nik Marshall-Blank MCSD/MCDBA
Linz, Austria
"Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
message news:D4C201FF-5E36-42B0-9FF2-C319E11CC07A@.microsoft.com...[vbcol=seagreen]
> Hello Nick,
> I think you forgot to post the links..?
> Regards
> Johnny Lundgren
> "Nik Marshall-Blank" wrote:
|||Nik,
I am sorry if I have used the wrong terms when asking the question.
I am very well acquainted with the MS Cluster Services but I am no expert on
SQL, I admit that, even if I have clustered a few by now.
In an SQL 2000 clusterinstallation, the logs will default reside on the same
shared drive as the db:s. Oracle (of which I also have done several succesful
cluster installations) recommend to put the log files on one or several local
disks, of security and performance reasons.
So, I ask you the question again:
Does Microsoft recommend the same ?
Directing the logfiles on local disks and separate from the O.S. ?
Or maybe on another shared drive than the DB:s ?
If the latter one is suggested, what is the impact on the "SQL function" if
the group with the logfiles would suddenly change ownership ?
I cannot find any documentation or MS recommendations on where to put these
logfiles.
Could you please clarify this, Nik and enlighten me ?
Regards
Johnny Lundgren
"Nik Marshall-Blank" wrote:
> Failover does not occur for disks just the computer itself. You have a
> shared disk resource(s) which 1 node in the cluster owns. Should that node
> fail then another will take over ownership of the disk resources. It sounds
> like you require fault tolerant hardware. I siggest to re-read all the links
> so you better understand clustering and what it provides.
> And log file placement is usually decided by performance resons.
> --
> Nik Marshall-Blank MCSD/MCDBA
> Linz, Austria
> "Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
> message news:1B59D480-E4F9-40F1-8609-CD7CC07DC331@.microsoft.com...
>
>
|||Putting logfiles on seperate drives is a performance issue. RAID-5 is
striped with paraity so it effectively spreads the IO over several physical
drives anyway. If you do not have performance issues then placing the drives
on the same shared drive as the data files is fine. You cannot put the
logfiles on local drives they must reside on a shared drive so the
opwnership can change. There are no issues with change of ownership. If node
1 fails then SQL is shutdown on that node the disks change ownership to the
other node and SQL starts on that node owning the same data that was being
used on the first node.
I hope this clarifies things for you.
Nik Marshall-Blank MCSD/MCDBA
Linz, Austria
"Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
message news:A2DE7B47-17C2-4BF8-81E4-14CF9D4273ED@.microsoft.com...[vbcol=seagreen]
> Nik,
> I am sorry if I have used the wrong terms when asking the question.
> I am very well acquainted with the MS Cluster Services but I am no expert
> on
> SQL, I admit that, even if I have clustered a few by now.
> In an SQL 2000 clusterinstallation, the logs will default reside on the
> same
> shared drive as the db:s. Oracle (of which I also have done several
> succesful
> cluster installations) recommend to put the log files on one or several
> local
> disks, of security and performance reasons.
> So, I ask you the question again:
> Does Microsoft recommend the same ?
> Directing the logfiles on local disks and separate from the O.S. ?
> Or maybe on another shared drive than the DB:s ?
> If the latter one is suggested, what is the impact on the "SQL function"
> if
> the group with the logfiles would suddenly change ownership ?
> I cannot find any documentation or MS recommendations on where to put
> these
> logfiles.
> Could you please clarify this, Nik and enlighten me ?
> Regards
> Johnny Lundgren
> "Nik Marshall-Blank" wrote:
|||Nik,
Actually, not quite.
One of the main reasons to put the logfiles on local disks in an Oracle
cluster environment is
that if the shared disk with the db:s totally fails, I am able to recover
the db:s anyway from the logfiles.
According to your statement, I am not able use local drives to put the SQL
logfiles.
To put them in another cluster group and consequently on another drive would
then not be possible either since the node that owns the SQL-db:s HAS to be
able to write to the disk with the logfiles. And if the shared disk with the
logfiles is owned by the other node...
You see what I mean here ?
My conclusion of our discussion is that I HAVE to place the logfiles on the
same shared disk as the SQL-db:s .
Do you agree, Nik ?
Regards
Johnny Lundgren
"Nik Marshall-Blank" wrote:
> Putting logfiles on seperate drives is a performance issue. RAID-5 is
> striped with paraity so it effectively spreads the IO over several physical
> drives anyway. If you do not have performance issues then placing the drives
> on the same shared drive as the data files is fine. You cannot put the
> logfiles on local drives they must reside on a shared drive so the
> opwnership can change. There are no issues with change of ownership. If node
> 1 fails then SQL is shutdown on that node the disks change ownership to the
> other node and SQL starts on that node owning the same data that was being
> used on the first node.
> I hope this clarifies things for you.
> --
> Nik Marshall-Blank MCSD/MCDBA
> Linz, Austria
> "Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
> message news:A2DE7B47-17C2-4BF8-81E4-14CF9D4273ED@.microsoft.com...
>
>
|||I see what you're driving at but you CAN have 2 seperate disk groups and set
the dependancies accordingy such that if one group changes then so must the
other group.
Nik Marshall-Blank MCSD/MCDBA
Linz, Austria
"Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
message news:F39B4B53-BE89-4AF0-836C-8846CAA9AE93@.microsoft.com...[vbcol=seagreen]
> Nik,
> Actually, not quite.
> One of the main reasons to put the logfiles on local disks in an Oracle
> cluster environment is
> that if the shared disk with the db:s totally fails, I am able to recover
> the db:s anyway from the logfiles.
> According to your statement, I am not able use local drives to put the SQL
> logfiles.
> To put them in another cluster group and consequently on another drive
> would
> then not be possible either since the node that owns the SQL-db:s HAS to
> be
> able to write to the disk with the logfiles. And if the shared disk with
> the
> logfiles is owned by the other node...
> You see what I mean here ?
> My conclusion of our discussion is that I HAVE to place the logfiles on
> the
> same shared disk as the SQL-db:s .
> Do you agree, Nik ?
> Regards
> Johnny Lundgren
> "Nik Marshall-Blank" wrote:
|||Are you sure ?
I have never seen any documents describing dependencies BETWEEN groups.
Only WITHIN groups.
If this is possible, why is it so poorly documented ?
You don′t happen to have any ?
Regards
Johnny Lundgren
"Nik Marshall-Blank" wrote:
> I see what you're driving at but you CAN have 2 seperate disk groups and set
> the dependancies accordingy such that if one group changes then so must the
> other group.
> --
> Nik Marshall-Blank MCSD/MCDBA
> Linz, Austria
> "Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
> message news:F39B4B53-BE89-4AF0-836C-8846CAA9AE93@.microsoft.com...
>
>
|||Oops Sunday rest day head got me there.
You are right, I meant resources, You can create another disk resource for
the logfiles within the same group and make the logfile resource dependacies
suc that they will always swap ownership with the main db resource group. I
can't see why you'd want a seperate group for the logfiles though, another
logfile resource within the same group would be sufficient.
I've re-read your posts to try to make sure I undertand your requirements
and I think I've done that. If you think I've misunderstood or not explaied
cleary enough please post it.
Nik Marshall-Blank MCSD/MCDBA
Linz, Austria
"Johnny Lundgren" <JohnnyLundgren@.discussions.microsoft.com> wrote in
message news:FB5EFBD5-07FA-4BF4-B537-631244748912@.microsoft.com...[vbcol=seagreen]
> Are you sure ?
> I have never seen any documents describing dependencies BETWEEN groups.
> Only WITHIN groups.
> If this is possible, why is it so poorly documented ?
> You dont happen to have any ?
> Regards
> Johnny Lundgren
> "Nik Marshall-Blank" wrote:
