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  • Data models and architecture

    Discussion of issues in data modeling, and whether databases should be consolidated or loosely coupled. Related subjects include:

    May 20, 2018

    Some stuff that’s always on my mind

    I have a LOT of partially-written blog posts, but am struggling to get any of them finished (obviously). Much of the problem is that they have so many dependencies on each other. Clearly, then, I should consider refactoring my writing plans. ??

    So let’s start with this. Here, in no particular order, is a list of some things that I’ve said in the past, and which I still think are or should be of interest today. It’s meant to be background for numerous posts I write in the near future, and indeed a few hooks for such posts are included below.

    1.? Data(base) management technology is progressing pretty much as I expected.

    2. Rightly or wrongly, enterprises are often quite sloppy about analytic accuracy.

    Read more

    April 17, 2017

    Interana

    Interana has an interesting story, in technology and business model alike. For starters:

    And to be clear — if we leave aside any questions of marketing-name sizzle, this really is business intelligence. The closest Interana comes to helping with predictive modeling is giving its ad-hoc users inspiration as to where they should focus their modeling attention.

    Interana also has an interesting twist in its business model, which I hope can be used successfully by other enterprise software startups as well. Read more

    March 12, 2017

    Introduction to SequoiaDB and SequoiaCM

    For starters, let me say:

    Also:

    Unfortunately, SequoiaDB has not captured a lot of detailed information about unpaid open source production usage.

    Read more

    December 18, 2016

    Introduction to Crate.io and CrateDB

    Crate.io and CrateDB basics include:

    In essence, CrateDB is an open source and less mature alternative to MemSQL. The opportunity for MemSQL and CrateDB alike exists in part because analytic RDBMS vendors didn’t close it off.

    CrateDB’s not-just-relational story starts:

    Read more

    January 22, 2016

    Cloudera in the cloud(s)

    Cloudera released Version 2 of Cloudera Director, which is a companion product to Cloudera Manager focused specifically on the cloud. This led to a discussion about — you guessed it! — Cloudera and the cloud.

    Making Cloudera run in the cloud has three major aspects:

    Features new in this week’s release of Cloudera Director include:

    I.e., we’re talking about some pretty basic/checklist kinds of things. Cloudera Director is evidently working for Amazon AWS and Google GCP, and planned for Windows Azure, VMware and OpenStack.

    As for porting, let me start by noting: Read more

    December 10, 2015

    Readings in Database Systems

    Mike Stonebraker and Larry Ellison have numerous things in common. If nothing else:

    I mention the latter because there’s a new edition of Readings in Database Systems, aka the Red Book, available online, courtesy of Mike, Joe Hellerstein and Peter Bailis. Besides the recommended-reading academic papers themselves, there are 12 survey articles by the editors, and an occasional response where, for example, editors disagree. Whether or not one chooses to tackle the papers themselves — and I in fact have not dived into them — the commentary is of great interest.

    But I would not take every word as the gospel truth, especially when academics describe what they see as commercial market realities. In particular, as per my quip in the first paragraph, the data warehouse market has not yet gone to the extremes that Mike suggests,* if indeed it ever will. And while Joe is close to correct when he says that the company Essbase was acquired by Oracle, what actually happened is that Arbor Software, which made Essbase, merged with Hyperion Software, and the latter was eventually indeed bought by the giant of Redwood Shores.**

    *When it comes to data warehouse market assessment, Mike seems to often be ahead of the trend.

    **Let me interrupt my tweaking of very smart people to confess that my own commentary on the Oracle/Hyperion deal was not, in retrospect, especially prescient.

    Mike pretty much opened the discussion with a blistering attack against hierarchical data models such as JSON or XML. To a first approximation, his views might be summarized as:? Read more

    October 15, 2015

    Couchbase 4.0 and related subjects

    I last wrote about Couchbase in November, 2012, around the time of Couchbase 2.0. One of the many new features I mentioned then was secondary indexing. Ravi Mayuram just checked in to tell me about Couchbase 4.0. One of the important new features he mentioned was what I think he said was Couchbase’s “first version” of secondary indexing. Obviously, I’m confused.

    Now that you’re duly warned, let me remind you of aspects of Couchbase timeline.

    Technical notes on Couchbase 4.0 — and related riffs ?? — start: Read more

    August 24, 2015

    Multi-model database managers

    I’d say:

    Before supporting my claims directly, let me note that this is one of those posts that grew out of a Twitter conversation. The first round went:

    Merv Adrian: 2 kinds of multimodel from DBMS vendors: multi-model DBMSs and multimodel portfolios. The latter create more complexity, not less.

    Me: “Owned by the same vendor” does not imply “well integrated”. Indeed, not a single example is coming to mind.

    Merv: We are clearly in violent agreement on that one.

    Around the same time I suggested that Intersystems Cache’ was the last significant object-oriented DBMS, only to get the pushback that they were “multi-model” as well. That led to some reasonable-sounding justification — although the buzzwords of course aren’t from me — namely: Read more

    March 23, 2015

    A new logical data layer?

    I’m skeptical of data federation. I’m skeptical of all-things-to-all-people claims about logical data layers, and in particular of Gartner’s years-premature “Logical Data Warehouse” buzzphrase. Still, a reasonable number of my clients are stealthily trying to do some kind of data layer middleware, as are other vendors more openly, and I don’t think they’re all crazy.

    Here are some thoughts as to why, and also as to challenges that need to be overcome.

    There are many things a logical data layer might be trying to facilitate — writing, querying, batch data integration, real-time data integration and more. That said:

    Read more

    March 10, 2015

    Notes on HBase

    I talked with a couple of Cloudera folks about HBase last week. Let me frame things by saying:

    Also:

    Read more

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