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Mirroring provides an admin capability to Stop Mirroring on this member, which causes a non-primary member to temporarily disconnect from the primary, stop dejournaling, etc. While most system administrators may never need or use this function, some employ it for certain kinds of maintenance or other special cases.
We recently went through an Audit of our Security Policies and Procedures when it comes to IRIS. As a result of that Audit, we need to make adjustments to the way that Security is setup within IRIS. I have already done my changes on our TEST and DEVELOPMENT environments, but now I am trying to plan out how do we make these changes in Production.
These changes include moving away from the PWS, setting up Apache/Web Gateway, moving to LDAP instead of using Delegated Authentication, updating Web Applications, updating Resources, updating Services, etc...
We recently published a new White Paper on the use of reporting nodes ("asynchronous reporting mirror members" in full) in a mirrored environment. More and more customers are looking into this mechanism as a quick and easy way to set up a copy of their production data that stays current, yet can be used for analytical querying or heavy-duty reporting workloads without impacting the source system. Read the White Paper here.
MIRROR is the best solution for almost immediate replications to a Failover Server. The related mechanics are based on Global Journaling.
Globals hold Data and Classes and Routines and more ... If Mirroring is in place all is in sync. With minimum delays This is of course rather useful for code changes in Classes, Routines, ....
To what extent is Embedded Python covered by Mirroring? Or: What is required to Synchronize EmbeddedPython like Mirroring.
Hi All! You may be interested to hear we've just released a new podcast episode all about mirroring, featuring conversations with @Chad Severtson from InterSystems and Greg King from J2. Take a listen and chime in on the conversation here if you have thoughts!
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I've been trying for a while to come up with a set of tools to monitor the health of a mirror set and email a report nightly on the status of the mirror, or flag issues in real time. Making sure that all the databases are caught up, that all the mirror members are online.
Good day!
Is there an opportunity to debug the ISCAgent behaviour (in Linux)? ISCAgent uses /etc/iscagent/iscagent.conf as configuration file, but in docs I've found a description only for two parameters (port number and interface - http://docs.intersystems.com/latest/csp/docbook/DocBook.UI.Page.cls?KEY=...). Other parameters I can see by running /usr/local/etc/cachesys/ISCAgentCtrl status:
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Can a Cache Mirror be used in the cloud ? (ie stand up a Primary and Backup member instances in a High Availability Cache Mirroring configuration)
I'm investigating the validity of this configuration, because I was of the understanding that this may not possible due to these cloud servers not (typically) having fixed ip addresses, which interferes with the Virtual IP settings for the mirror set.
Is this correct, and if there are workarounds (like Load Balancing ?) can I have details on how this should be configured ?
Is it possible to use one IIS server to configure Webgateway and external Webserver for management portal when implementing synchronous mirroring with VIP i.e Is it necessary to have two mirror servers(primary and Backup) , one Arbiter server, one Webserver for Webgateway and a sperate webserver for management portal?
If anyone can please point to any documentation on Mirroring with Webgateway and external webserver for management portal will be really helpful.
I want to use ^Mirror routine to configure mirroring. Can someone please tell what classes and methods I need to use with syntax for configuring the mirroring please OR please point me to any tutorial where ^Mirror routine is used to configure mirror.
The SYS.Mirror CatchupDB() method requires a System File Number/Inode value as a parameter. I have not yet found a suitable internal method to get this value. Is anyone aware of a utility method that would do this? I do know I can get this value with a small amount of Python or by calling out to the OS. However I wanted to stick with pure Objectscript in this project if possible.
Failing in this I will use embedded python to run the line or two of Python needed to get this value.
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.”
Hi! I am planning to move my Arbiter from a Unix server to a container(again on linux). To do this, I need the ISCAgent tar.gz file to configure Arbiter for our mirrored servers. I have tried searching for it on the Intersystems help forums but couldn't find it. Is it possible for someone to redirect me to the correct website to download it?
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.
Hello, we deploy IRIScluster using IKO on Red Hat OpenShift deployed in AWS. For DR, we have another AWS region on stand by. We do daily backups. I run a standalone IRIS in the second region. I want to add it as async member to the mirror to have some essential data available in the standby region. Is this possible?