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sql server clustering : high availabilty of windows/sql clustering
plan to have complete as built documents? 24 x 7 mentoring? SLA? Top management support? Trained personal? Tested restores? Fully designed systems? How are you defining availability? Cheers, Rodney R. Fournier MVP - Windows Server - Clustering http://www.nw-america.com - Clustering Website http://msmvps.com/clustering - Blog http://www.clusterhelp.com - Cluster Training ClusterHelp.com is a Microsoft Certified Gold Partner [quoted text, click to view] "gigel" <gigel@chidu.net> wrote in message news:ektIPI04HHA.2312@TK2MSFTNGP06.phx.gbl... > How well does MS clustering meet the 99.999% availability? > What other technoologies/architectures that do a better job from this > stand-point? > > Gigel >
How well does MS clustering meet the 99.999% availability?
What other technoologies/architectures that do a better job from this stand-point? Gigel
We are using MS clustering on all of our SQL servers and we are 99.999% HA.
We have no issues and been very stable. Ayad Shammout [quoted text, click to view] "gigel" <gigel@chidu.net> wrote in message news:ektIPI04HHA.2312@TK2MSFTNGP06.phx.gbl... > How well does MS clustering meet the 99.999% availability? > What other technoologies/architectures that do a better job from this > stand-point? > > Gigel >
[quoted text, click to view]
"gigel" <gigel@chidu.net> wrote in message news:%23dVi0j14HHA.3940@TK2MSFTNGP05.phx.gbl... > Rodney, > > I agree 100%, but there are things that happen(or happened) outside of > dba's control. > > Here is how I would define unavailability, the total amount of time in the > course of a year when a database is unavailable, cause by applying > windows or sql service packs. More concerned with situations when the > installation doesn't go smoothly and the last resort is rebuilding the > cluster or installing sql from scratch. I would define it as the total time unavailable during hours when the service is required. So, for example, if there is no requirement for it to be available at 2am because there are no users, then taking an outage at that time would not count against me. There are many other views on the term. -- Russ Kaufmann MVP - Windows Server - Clustering ClusterHelp.com, a Microsoft Certified Gold Partner Web http://www.clusterhelp.com Blog http://msmvps.com/clusterhelp The next ClusterHelp classes are: Sep 3 - 6 in Copenhagen Oct 8 - 11 in New York
You and I can talk about definitions all day, what does your SLA say? Your
customer expect? Cheers, Rodney R. Fournier MVP - Windows Server - Clustering http://www.nw-america.com - Clustering Website http://msmvps.com/clustering - Blog http://www.clusterhelp.com - Cluster Training ClusterHelp.com is a Microsoft Certified Gold Partner [quoted text, click to view] "gigel" <gigel@chidu.net> wrote in message news:%23dVi0j14HHA.3940@TK2MSFTNGP05.phx.gbl... > Rodney, > > I agree 100%, but there are things that happen(or happened) outside of > dba's control. > > Here is how I would define unavailability, the total amount of time in the > course of a year when a database is unavailable, cause by applying > windows or sql service packs. More concerned with situations when the > installation doesn't go smoothly and the last resort is rebuilding the > cluster or installing sql from scratch. > > Gigel > > "Rodney R. Fournier [MVP]" <rod@die.spam.die.nw-america.com> wrote in > message news:%23NWhcS04HHA.1484@TK2MSFTNGP06.phx.gbl... >> Systems are only as good as your people, processes, and procedures. Do >> you plan to have complete as built documents? 24 x 7 mentoring? SLA? Top >> management support? Trained personal? Tested restores? Fully designed >> systems? >> >> How are you defining availability? >> >> Cheers, >> >> Rodney R. Fournier >> >> MVP - Windows Server - Clustering >> http://www.nw-america.com - Clustering Website >> http://msmvps.com/clustering - Blog >> http://www.clusterhelp.com - Cluster Training >> ClusterHelp.com is a Microsoft Certified Gold Partner >> >> >> "gigel" <gigel@chidu.net> wrote in message >> news:ektIPI04HHA.2312@TK2MSFTNGP06.phx.gbl... >>> How well does MS clustering meet the 99.999% availability? >>> What other technoologies/architectures that do a better job from this >>> stand-point? >>> >>> Gigel >>> >> >> > >
Thanks for your reply Ayad.
What about situations when you have to apply windows or sql service packs? I guess on a well built / well maintained cluster the installation of service packs is smooth with little downtime. But what about when things aren't going smoothly? Gigel [quoted text, click to view] "Ayad Shammout" <ashammout1@hotmail.com> wrote in message news:OnUpGR04HHA.484@TK2MSFTNGP06.phx.gbl... > We are using MS clustering on all of our SQL servers and we are 99.999% > HA. > > We have no issues and been very stable. > > Ayad Shammout > > "gigel" <gigel@chidu.net> wrote in message > news:ektIPI04HHA.2312@TK2MSFTNGP06.phx.gbl... >> How well does MS clustering meet the 99.999% availability? >> What other technoologies/architectures that do a better job from this >> stand-point? >> >> Gigel >> > >
Rodney,
I agree 100%, but there are things that happen(or happened) outside of dba's control. Here is how I would define unavailability, the total amount of time in the course of a year when a database is unavailable, cause by applying windows or sql service packs. More concerned with situations when the installation doesn't go smoothly and the last resort is rebuilding the cluster or installing sql from scratch. Gigel "Rodney R. Fournier [MVP]" <rod@die.spam.die.nw-america.com> wrote in message news:%23NWhcS04HHA.1484@TK2MSFTNGP06.phx.gbl... [quoted text, click to view] > Systems are only as good as your people, processes, and procedures. Do you > plan to have complete as built documents? 24 x 7 mentoring? SLA? Top > management support? Trained personal? Tested restores? Fully designed > systems? > > How are you defining availability? > > Cheers, > > Rodney R. Fournier > > MVP - Windows Server - Clustering > http://www.nw-america.com - Clustering Website > http://msmvps.com/clustering - Blog > http://www.clusterhelp.com - Cluster Training > ClusterHelp.com is a Microsoft Certified Gold Partner > > > "gigel" <gigel@chidu.net> wrote in message > news:ektIPI04HHA.2312@TK2MSFTNGP06.phx.gbl... >> How well does MS clustering meet the 99.999% availability? >> What other technoologies/architectures that do a better job from this >> stand-point? >> >> Gigel >> > >
any patching would involve moving resources from node to node and vice versa
multiple times, so you also need to know whether whatever application youre running is cluster-aware or whether each failover will create outages to users which last long after the the cluster has finished failing over. You patch one node at a time and test after each stage so you should never need to "start from scratch" you'd just restore one node. If your company dont provide a real test lab then they shoudlnt expect an exact figure, I assume they opted for a "high availability" cluster hardware along with redundant power and environmental control etc otherwise theyre not seeing the whole picture when they ask for a "minutes per year" [quoted text, click to view] "gigel" <gigel@chidu.net> wrote in message news:%23dVi0j14HHA.3940@TK2MSFTNGP05.phx.gbl... > Rodney, > > I agree 100%, but there are things that happen(or happened) outside of dba's > control. > > Here is how I would define unavailability, the total amount of time in the > course of a year when a database is unavailable, cause by applying > windows or sql service packs. More concerned with situations when the > installation doesn't go smoothly and the last resort is rebuilding the > cluster or installing sql from scratch. > > Gigel > > "Rodney R. Fournier [MVP]" <rod@die.spam.die.nw-america.com> wrote in > message news:%23NWhcS04HHA.1484@TK2MSFTNGP06.phx.gbl... > > Systems are only as good as your people, processes, and procedures. Do you > > plan to have complete as built documents? 24 x 7 mentoring? SLA? Top > > management support? Trained personal? Tested restores? Fully designed > > systems? > > > > How are you defining availability? > > > > Cheers, > > > > Rodney R. Fournier > > > > MVP - Windows Server - Clustering > > http://www.nw-america.com - Clustering Website > > http://msmvps.com/clustering - Blog > > http://www.clusterhelp.com - Cluster Training > > ClusterHelp.com is a Microsoft Certified Gold Partner > > > > > > "gigel" <gigel@chidu.net> wrote in message > > news:ektIPI04HHA.2312@TK2MSFTNGP06.phx.gbl... > >> How well does MS clustering meet the 99.999% availability? > >> What other technoologies/architectures that do a better job from this > >> stand-point? > >> > >> Gigel > >> > > > > > >
Hello Gigel
[quoted text, click to view] > But what about when things aren't going smoothly? The fail over will work fine..Well, i can speak in my experience, seven years using SQL clusters The problem about the service not available is in "most" cases is related to HW (bios, drivers, frimware, SP), and in this cases is when you can use the cluster fail over, at this time you have like 30 seconds of downtime while the service is moved to other node... If the problem is software I recommend to have a support contract whit MSFT.. or the software installed in the cluster, in MSFT the cases can be fixed for a patch o directions that msft can provide in allmost cases, in other cases you can find a document in the KB of microsoft and download the file o request the patch directly.. ** try to have updated all drivers and bios for your cluster ... [quoted text, click to view] "gigel" wrote:
> How well does MS clustering meet the 99.999% availability? > What other technoologies/architectures that do a better job from this > stand-point? > > Gigel > >
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