The Update Checklist for v2015.1 recommends setting the TZ environment variable on Linux platforms and points to the manpage for tzset. This is recommended to improve the performance of Cache’s time-related functions. You can find out more about this here:
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.
If I have a cache.dat file from a Windows 2012 (64-bit) machine and I want to mount it on a Caché instance running on RHEL, will it work? Assume the versions of Caché are the same.
I have seen a customer problem recently where the use of a virus scanner running over Caché databases was causing intermittent application slow downs and bad user response times.
This is a surprisingly common problem, so this short post is just a reminder to exclude key Caché components from your virus scanning.
Generally virus scanning must exclude the CACHE.DAT database files and Caché binaries. If an anti-virus is scanning CACHE.DATs and InterSystems files then system performance will be significantly impacted.
Our Cache server(version 5.0.15) has recently crashed. We are in the process of recovery. We had replaced the server's hard disk and trying to install the cache(5.0.15) But getting the following error. Any body show some light on the issue.
I am trying to install Caché 2016 on a Debian Jessie machine; so I downloaded the latest release from WRC, OS RHEL x86_64, in tarball format.
I untarred it, then launched cinstall; unfortunately a library was missing. I then elected to kill all the processes (which wasn't easy), remove the two users created, and start again.
I followed the Documentation instructions to install Caché on my Linux box and it seems to be running fine except when I try to modify the configuration. I keep getting errors that a previous cache.cpf file (e.g., cache.cpf_8503) cannot be opened. Is my Linux "user who owns instance" account deficient in Linux permissions?
The following situation always catches out new Ensemble users, and is likely to continue doing this until it is addressed..
A business operation, service or other host that is configured with a dedicated # of actors, (ie, not using the actor pool) runs with the version of compiled code that existed when the host was started. This code is loaded in memory.
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.
Presenter: Ray Fucillo Task: Provide high availability (HA) and disaster recovery (DR) in diverse architectures that demand high performance, including replication over long distances Approach: Give examples of mirror architectures in disparate environments, including geographically separated systems. Discuss performance considerations and advances in InterSystems’ mirroring technology
In this session you will learn about deploying Mirroring to provide HA and DR in diverse architectures that demand high performance and throughput. Challenges and solutions to achieving high throughput will be covered along with mirror architectures that involve long distances and disparate environments.
Content related to this session, including slides, video and additional learning content can be found here.
Presenter: Kerry Kirkham Task: Prevent application-to-application interface problems from escalating Approach: Give examples of using alerts to get the right person working on a problem as soon as possible
Problems with application-to-application interfaces are inevitable but in most cases they can be fixed with little disruption as long as the right person gets to know about it as soon as possible. But delays in attention cause problems to escalate, pressure mounts and business suffers. This session looks at how monitoring and alerting can be set up to recognize problems and get the right person working on the problem in the shortest possible time so that small problems don’t turn into major issues.
Solution: Using alerts to minimize interface problems
Content related to this session, including slides, video and additional learning content can be found here.
Presenter: Murray Oldfield Task: Avoid bottlenecks caused by scaling up, before they become a problem Approach: Discuss what operating system and InterSystems metrics you should look at and how to interpret them
Systems behave differently when database activity scales up. In the worst case, bottlenecks appear and users are impacted. This session shows you which operating system and InterSystems metrics you should be looking at and how to interpret them so you can head off bottlenecks before they impact users. This sessions also shows strategies for planning infrastructure taking into consideration InterSystems' data platforms requirements.
Content related to this session, including slides, video and additional learning content can be found here.
I was looking at the “Purge Data Management” page, and one of the “Record Types” is the “I/O Log” which sometimes doesn’t clear when you purge all of the message.
But I’m not sure what it’s actually reporting as “I/O Log” messages (and I can’t find anyplace to view what is being considered I/O Logged Messages - so I can understand what’s happening)
Whichever way you want to look at it, their numbers are impressive... growing revenue year-on-year of 69% is amazing... and now they are opening DCs in Canada and India...
A simple and rather automated search portal leveraging iFind capabilities for rich text search in 2016.1. It has simple faceting, result ranking, highlighting of search results etc and just works off any table you point it to that has an iFind index by appending ?t=MyPackage.TableName to the URL.
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 ?
Attached is an example of a web service client that can be used to do a lookup against the CMS NPPES database to validate and retrieve information about a given National Provider Identification (NPI).
I'm working on a proposal for a deployment tool development project and I was wondering if anyone had any experience with such a thing.
We use Healthshare and implementations for new clients are tedius and lengthy. Lots of ensemble service, registry value, lookup tables, namespaces and other things have to be created and configured.
I would like to create a Zen or CSP page based deployment tool that can do all this with a few parameters and some custom code.
Some third party backup products may by default restore CACHE.DAT files as UNIX sparse files when there are trailing zeroes in the backup file.
The support for sparse files vary from UNIX distribution and file system types. Sparse files attempt to use file system space more efficiently when blocks allocated to the file are mostly empty similar to thin-provisioned storage. The file system transparently converts metadata representing empty blocks into "real" blocks filled with zero bytes at runtime. The application is suppose to be unaware of this conversion.
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