Oren Eini

aka Ayende Rahien

Oren Eini

CEO of RavenDB

a NoSQL Open Source Document Database

Get in touch with me:

oren@ravendb.net

+972 52-548-6969

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RavenDB Workshops - Deep dive into practical use of Document Data Modeling

Jul 02 2006

RiddleActive Record as a Rule Engine

time to read 1 min | 200 words

I mentioned in a previous post that I used Active Record as a Rule Engine, and a couple of people asked just how. Before I will post the answer, I want to see if you can come up with the same idea.

The scenario:

A rule engine that can process big amount of data. The engine will run as a Windows service, and not as a part of another application.

Throughput is important, as well as flexibility in the rules and what they can do. The processing of each rule can be quite complex, so it is important that the rule engine will not limit what the rule can do.

Hints:

A database is really good in filtering data.
Active Record (well, NHibernate, but it is the same thing) can take inheritance to the database level.

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More posts in "Riddle" series:

(12 Oct 2010) File access & Multi threading
(06 May 2010) String outputs
(02 May 2010) Hard links & file moves

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FUTURE POSTS

Partial writes, IO_Uring and safety - one day from now
Configuration values & Escape hatches - 4 days from now
What happens when a sparse file allocation fails? - 6 days from now
NTFS has an emergency stash of disk space - 8 days from now
Challenge: Giving file system developer ulcer - 11 days from now

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20 Jan 2025 - What does this code do?
Answer (13):
22 Jan 2025 - What does this code do?
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RECENT COMMENTS

Dmitry, Yes, but this is _known_ to be a 64 bits system - since we are allocating 3GB (not possible in 64 bits). Note t...

By Oren Eini on Answer: What does this code do?
That's why it is a good idea to compare the return value of `write` to the buffer size. "size_t" can be 32-bit on some system...

By Dmitry on Answer: What does this code do?
There's a reason we miss `write_exact` and `read_exact` from the standard library. In fact, I am surprised the chunk is actua...

By Pyth0n on Challenge: What does this code do?
kpvleeuwen, I agree, unfortunately I don't have anyone to ask off the top of my head. Thanks, I fixed the headers.

By Oren Eini on Performance discovery: IOPS vs. IOPS
It could be interesting to reach out to storage firmware developers and ask what write patterns they think would be useful ex...

By kpvleeuwen on Performance discovery: IOPS vs. IOPS

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