IRISList is a wrapper over InterSystems IRIS $lb structure, and it supports these value types: Int16, Int32, Int64, bool, Single, Double, string, byte[], IRISList.

To be more specific the following datatypes are available.

• ISO/IEC 8859{1 string. The remainder of the $LIST element is a string of ISO/IEC 8859-1 characters.
• UNICODE string. The remainder of the $LIST element is a string of UNICODE characters in UTF-16 little endian format.
• Positive integer. The remainder of the $LIST element is an unsigned integer in little endian order with high order zero octet truncated.
• Negative integer. The remainder of the $LIST element is a negative integer in twos complement little endian order with high order #FF octet truncated.
• Positive radix 10 number. The next octet is a signed char that serves as an exponent. That is followed by an unsigned integer in little endian order with high order zero octet truncated. The value of the number is integer × 10exponent.
• Negative radix 10 number. The next octet is a signed char that serves as an exponent. That is followed by a negative integer in twos complement little endian order with high order #FF octet truncated. The value of the number is integer × 10exponent.
• IEEE floating point number. Length must allow for either 4 or 8 (preferred) octet of data.

In C# Decimal can be constructed from {Int32, Int32, Int32, Boolean, Byte} and you can use GetBits method to retrieve these parts from Decimal   (docs).

Depends on the project I guess.

Trivial fixes can be sent via pulls directly.

Bigger fixes usually require time to fix so some discussion can help.

That said, opening empty pull and talking there also works.

In most cases just process special variable should be enough:

Set SourceConfigName = process.%PrimaryRequestHeader.SourceConfigName  

Here's how you can contact the WRC.

Post your script?

Are linefeeds correct for os?

6252 can be used for both DCPM and DRAM configuration.

Great article, Mark!

I have a few notes and questions:

1. Here's a brief comparison of different storage categories:

• Intel® Optane™ DC Persistent Memory has read throughput of 6.8 GB/s and write throughput 1.85 GB/s (source).
• Intel® Optane™ SSD has read throughput of 2.5 GB/s and write throughput of 2.2 GB/s at (source).
• Modern DDR4 RAM has read throughput of ~25 GB/s.

While I certainly see the appeal of DC Persistent Memory if we need more memory than RAM can provide, is it useful on smaller scale? Say I have a few hundred gigabytes of indices I need to keep in global buffer and be able to read-access fast. Would plain DDR4 RAM be better? Costs seem comparable and read throughput of 25 Gb/s seems considerably better.

2. What RAM was used in a Server #1 configuration?

3. Why are there different CPUs between servers?

4. Workload link does not work.

Why do you want to do that?

Load the code and open main csp page. That's enough for the project to work.

Use byte[] to pass streams. So:

byte[] bytes = Encoding.Default.GetBytes(txt);
...
var parameter = new object[]
        {
            bytes,
            qspec,  
            errorlog,
            loadedItems
        };

Working with collection properties documentation.

If you want to hold a list of objects at runtume, use %ListOfObjects.

If you want to store a list of objects use collection properties (as you use ListOfPatient).

Where's the printer relative to the Ensemble server?

That's a fairly recent version of Python. Not sure if old Python Binding works with it. I can recommend you to:

• Contact the WRC
• Upgrade to InterSystems IRIS which would allow you to use new Native API for Python
• Use PythonGateway
• Use PyODBC or JayDeBeAapi packages for data transfer

As to Supported Server Platforms, it might be even Ubuntu 18.04 LTS for x86-64 rather than 16.04.  

Question was about Ensemble initially which supports 16.04. InterSystems IRIS Supports 18.04.

And what about RHEL 8? Which IRIS version will be supported under this OS?  

Asking @Andreas Dieckow to comment.

Yes, looks like no exception is thrown.

Try this query:

sql = "SELECT 1"  

Any exceptions on stack?

import sys, traceback
traceback.format_exception(sys.last_type, sys.last_value, sys.last_traceback)

Can you run SELECT 1 query?

To answer that, before query is compiled all arguments are parametrized:

like 'text%'

becomes

like ?

so we can't really replace LIKE with %STARTSWITH on code generation step (there's a brackets argument specification I suppose).