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#High Availability

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High availability (HA) refers to the goal of keeping a system or application operational and available to users a very high percentage of the time, minimizing both planned and unplanned downtime.

Documentation.

Presenters: Pete Greskoff, Sebastian Musielak
Task: Ensure high availability of your HealthShare deployments
Approach: Discuss high-availability options and focus on HealthShare’s new support for database mirroring

With the new release of HealthShare, Mirroring is now support for high availability. This session will describe high availability options and focus on mirroring your HealthShare deployments.

Content related to this session, including slides, video and additional learning content can be found here.

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I am new to setting up a mirror environment....

We will have a Arbiter, Two Failover members (A,B), and a Async (DR) member (C). I have the two failover members in sync and are configured for Arbiter Control.

My question is about the Async member, when I initially set it up I pointed it to the mirror on the primary node A.

Is that correct?

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I am looking into creating a ZSTOP as you probably have seen from my previous posts, is there a way to capture the type of shutdown that occurred? So say if there was an unknown hardware failure (forced), vs a user shutdown? Mainly looking for user or system shutdown when we force another destination to become the primary in the mirror. So if a user shutdown the production to do.,... Task A, Task B etc..

Thanks

Scott

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We are trying to script a High Availability Shutdown/Start script in case we need to fail over to one of our other servers we can be back up within mins. Is there a way to configure the startup procedure to Automatically Stop/Start the JDBC server when shutting down or starting up cache? is there an auto setting we can change?

Thanks

Scott Roth

The Ohio State University Wexner Medical Center

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Has anyone noticed that when IRIS is forced down that the EnsLib.JavaGateway.Services do not properly shut down and release the ports? While we can write a shell script to kill the processes at the OS level, I was wondering if anyone experienced this issue.

We are working on our Mirroring setup/failover and had the team testing forcing the Primary down to make the Backup to become the Primary Server. When this happened and we failed back, IRIS could not restart the JavaGateway.Services because the ports were still in use.

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ISCAgent is automatically installed with Cache, runs as a service and can be configured to
start with the system. This is fine – but the complication comes when this is on VCS clusters with
Mirroring on. When installing a Single Instance of Cache in a Cluster, point number 2. Says “Create
a link from /usr/local/etc/cachesys to the shared disk. This forces the Caché registry and all
supporting files to be stored on the shared disk resource you have configured as part of the
service group.”

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Question
· Nov 16, 2016
timeout value

looking for what the timeout value is for the connection for shadowing. and if it is known the timeout for mirroring also.

I'm currently getting this error and when we go to mirroring it would be good to know also, this way we can go back to our network vendor and give them as much info as possible.

10/19/16-12:19:40:696 (d30b6) 2 [SHADOWING] SHADOW SERVER (PRODSHAD): <ZREAD>ReadNone+3^SHDWUTIL;ERROR #1071: TCP read timed out - remote server is not responding (repeated 16 times)

thanks

Paul

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In Episode 5 of Data Points, @Bob.Binstock9141 joins us to talk about mirroring databases for high availability in InterSystems products! Most of the discussion centers around this process in InterSystems IRIS, with a few notes about the differences when tackling it in HealthShare. Take a listen and let us know your thoughts!

https://5e18edf067eb59-03854285.castos.com/player/159215
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