3 ms·

Lightning Memory-Mapped Database (LMDB)

TheAceOfHearts 8y ago
I think more developers should learn about LMDB. When people think about embedded databases they usually think about SQLite, and during the last year I've seen many posts about it, yet I never see anyone even mention LMDB, which seems like a shame considering how powerful it can be for certain use-cases. I've linked to the Wikipedia article because it has the most useful information for a first encounter with the technology within a single page. In comparison, the official page [0] has rather janky styles and a very enterprise-y design, which I think might turn off some people from giving it a fair chance. With that said, the technical information page [1] actually has a lot of good links including a list of some of the big projects using LMDB and a list of bindings for all major programming languages. There's also their documentation page [2], although it looks like it hasn't been updated since 2015. For anyone interested in trying it out, you'll want to read through their Getting Started [3] page. Many of the binding also include great docs, which might be a viable alternative for someone that's not as comfortable or experienced with C. Many of their blog posts [4] are worth reading if you're interested in its design and the different tradeoffs made. [0] https://symas.com/lmdb/ https://symas.com/lmdb/ [1] https://symas.com/lmdb/technical/ https://symas.com/lmdb/technical/ [2] http://www.lmdb.tech/doc/ http://www.lmdb.tech/doc/ [3] http://www.lmdb.tech/doc/starting.html http://www.lmdb.tech/doc/starting.html [4] https://symas.com/category/lmdb/ https://symas.com/category/lmdb/
- hyc_symas 8y ago
  Hey, thanks for your interest. I gotta say, I hate the enterprisey page too. But, enterprises buy the support contracts that put food on my table, so I finally had to relent on that. (The original page, which was my handwritten HTML, is still at http://www.lmdb.tech/oldindex.html http://www.lmdb.tech/oldindex.html but I'm no longer updating it. My updates just go to symas.com/lmdb/technical now.) The doc page hasn't really needed any updates since the API has been stable.
remzouz 8y ago
Best random key search performance I've ever seen.

I think more developers should learn about LMDB. When people think about embedded databases they usually think about SQLite, and during the last year I've seen many posts about it, yet I never see anyone even mention LMDB, which seems like a shame considering how powerful it can be for certain use-cases. I've linked to the Wikipedia article because it has the most useful information for a first encounter with the technology within a single page. In comparison, the official page [0] has rather janky styles and a very enterprise-y design, which I think might turn off some people from giving it a fair chance. With that said, the technical information page [1] actually has a lot of good links including a list of some of the big projects using LMDB and a list of bindings for all major programming languages. There's also their documentation page [2], although it looks like it hasn't been updated since 2015. For anyone interested in trying it out, you'll want to read through their Getting Started [3] page. Many of the binding also include great docs, which might be a viable alternative for someone that's not as comfortable or experienced with C. Many of their blog posts [4] are worth reading if you're interested in its design and the different tradeoffs made. [0] https://symas.com/lmdb/ https://symas.com/lmdb/ [1] https://symas.com/lmdb/technical/ https://symas.com/lmdb/technical/ [2] http://www.lmdb.tech/doc/ http://www.lmdb.tech/doc/ [3] http://www.lmdb.tech/doc/starting.html http://www.lmdb.tech/doc/starting.html [4] https://symas.com/category/lmdb/ https://symas.com/category/lmdb/

hyc_symas 8y ago
Hey, thanks for your interest. I gotta say, I hate the enterprisey page too. But, enterprises buy the support contracts that put food on my table, so I finally had to relent on that. (The original page, which was my handwritten HTML, is still at http://www.lmdb.tech/oldindex.html http://www.lmdb.tech/oldindex.html but I'm no longer updating it. My updates just go to symas.com/lmdb/technical now.) The doc page hasn't really needed any updates since the API has been stable.

remzouz 8y ago

Best random key search performance I've ever seen.