DevMavens

ma•ven (mā'vən)

n.  A person who has special knowledge or experience;
an expert.

dev•ma•ven
('dev-mā'vən)

n.  An expert developer with great influence.

Oren Eini

Oren Eini is a senior developer / architect, focusing on architecture, data access and best practices. Most often, he is working on building complex business systems using .Net 2.0, NHibernate and Castle's Frameworks, providing training and guidance for the use of Object Relational Mapping, Inversion of Control, Domain Driven Design and other exciting topics. Oren is an active member in several leading Open Source projects, including (but not limited :-) ) NHibernate, Castle and Rhino Mocks.


Ayende @ Rahien | 03 Apr 2020 12:00

To all user groups: virtual meetups availabilitySubscribe to this feed

Oren Eini writes "....Given the Coronavirus going around, meetups and user groups world wide has been canceled.The upside of this, however, is that we are starting to see a lot more virtual meetups. Last week I spoke in SF meeting from my home, and in a couple of weeks..."
Read more »  To all user groups: virtual meetups availability


Ayende @ Rahien | 02 Apr 2020 12:00

Virtual meetup: Modeling in a Non-Relational WorldSubscribe to this feed

Oren Eini writes "....In a couple of weeks I’m going to be speaking in the DotNet Iasi group about modeling in a non relational world.NoSQL databases are becoming increasingly more important. However, the vast majority of developers have learned to model and work with..."
Read more »  Virtual meetup: Modeling in a Non-Relational World


Ayende @ Rahien | 01 Apr 2020 12:00

Working on the weekendsSubscribe to this feed

Oren Eini writes "....I was forwarded an email from a team member, they wanted me to know about a discussion they had with an external entity. That is pretty routine, but the last sentence in the email caught my eye:A side question, I have impression that Oren works..."
Read more »  Working on the weekends


Ayende @ Rahien | 30 Mar 2020 12:00

Coronavirus update: Hibernating Rhinos is offering 2 months of FREE RavenDB supportSubscribe to this feed

Oren Eini writes "....The coronavirus is a global epidemic and has had impact on the entire world. It has shaken the foundations of our society and has made things that would seem like bad science fiction a reality. The fact that most of the world is now under some form..."
Read more »  Coronavirus update: Hibernating Rhinos is offering 2 months of FREE RavenDB support


Ayende @ Rahien | 26 Mar 2020 12:00

Investigating a query sort issue in RavenDBSubscribe to this feed

Oren Eini writes "....A user reported that a particular query returned the results in an unexpected order. The query in question looked something like the following:Note that we first search by score(), and then by the amount of sales. The problem was that documents that..."
Read more »  Investigating a query sort issue in RavenDB


Ayende @ Rahien | 25 Mar 2020 12:00

Start playing with RavenDB 5.0, todaySubscribe to this feed

Oren Eini writes "....I announced the beta availability of RavenDB 5.0 last week, but I missed up on some of the details on how to enable that. In this post, I’ll give you detailed guide on how to setup RavenDB 5.0 for your use right now.For the client libraries, you can..."
Read more »  Start playing with RavenDB 5.0, today


Ayende @ Rahien | 24 Mar 2020 12:00

Giving a job candidate a HARD problemSubscribe to this feed

Oren Eini writes "....Every now and then I’ll run into a problem and say, “Oh, that would be a great thing to give in a job interview”. In addition to the Corona issue, Israel has been faced with multiple cases of hung parliament. Therefor, I decided that the next..."
Read more »  Giving a job candidate a HARD problem


Ayende @ Rahien | 23 Mar 2020 12:00

Production postmortem: high CPU when there is little work to be doneSubscribe to this feed

Oren Eini writes "....A RavenDB user called us with a very strange issue. They are running on RavenDB 3.5 and have run out of disk space. That is expected, since they are storing a lot of data. Instead of simply increasing the disk size, they decided to take the time and..."
Read more »  Production postmortem: high CPU when there is little work to be done


Ayende @ Rahien | 20 Mar 2020 12:00

RavenDB 5.0: Optimizing date range queriesSubscribe to this feed

Oren Eini writes "....I can a lot about the performance of RavenDB, a you might have noticed from this blog. A few years ago we had a major architecture shift that increased our performance by a factor of ten, which was awesome. But with the meal, you get appetite, and..."
Read more »  RavenDB 5.0: Optimizing date range queries


Ayende @ Rahien | 19 Mar 2020 12:00

Investigating query performance issue in RavenDBSubscribe to this feed

Oren Eini writes "....We got a query perf issue from a user. Given a large set of documents, we run the following queries:Query time: 1 – 2 msAnd:Query time: 60 – 90 msLooking into the details, I run the following query:Which gives us the following details (I was running..."
Read more »  Investigating query performance issue in RavenDB


This Maven's Blog

Oren Eini

Ayende Rahien

Israel