cruppstahl

5 ms·

1.
by cruppstahl 8y ago
I'm 40, and I enjoy being 40. I feel that I start to understand why things are the way they are, why other people behave like they do, and why I am how I am. I don't go so far to say that i grok everything, but I certainly have a
2.
by cruppstahl 10y ago
Correct.
3.
by cruppstahl 10y ago
I ran sysbench benchmarks with 30 concurrent connections. The performance gap between InnoDB and upscaledb shrank a bit, but not much. The reason is that most of the performance is spent in MySQL and not in the key/value store, and the
4.
by cruppstahl 10y ago
It's ok! The example storage engine could implement more functionality, just to demonstrate i.e. how rows are serialized/deserialized etc. The test suite was very helpful.
5.
by cruppstahl 10y ago
Not necessarily. I ran sysbench with InnoDB and manually switched off transactions, and it was a lot slower. I don't know why - didn't look into it. upscaledb does use transactions. I.e. if you insert a row with a primary and a
6.
by cruppstahl 10y ago
If that's your definition of atomicity - yes, upscaledb offers atomic operations. If you define atomicity as the "A" in "ACID" then no - BEGIN/COMMIT wrappers are not yet available. Work in progress!
7.
by cruppstahl 10y ago
BEGIN/COMMIT is not yet supported. But that's on my TODO list.
8.
Show HN: I built a MySQL storage engine which is InnoDB compatible(upscaledb.com)
106 points by cruppstahl 10y ago|30 comments
9.
Problems (and solutions) for adding key compression to Btrees(upscaledb.com)
1 points by cruppstahl 10y ago|0 comments
10.
by cruppstahl 10y ago
Thanks for the insights!
11.
by cruppstahl 10y ago
Interesting - thanks for your answers!
12.
by cruppstahl 10y ago
Agree for a website. I'm selling software licenses, avoiding personal liability would be interesting (if it was affordable).
13.
by cruppstahl 10y ago
"Found a small company (UG) with 500EUR capital to hold rights on the site if you want to further professionalize this project." Can you elaborate a bit? I have the same problem as the original poster. But founding a company requi
14.
Libvbyte: C library for integer compression (32bit, 64bit, SIMD)(github.com)
4 points by cruppstahl 10y ago|1 comments
15.
by cruppstahl 10y ago
That's interesting - are the 64bit versions available for download?
16.
Benchmarking 32bit integer key compression for a C++ Btree(upscaledb.com)
36 points by cruppstahl 10y ago|5 comments
17.
32bit integer compression algorithms(upscaledb.com)
4 points by cruppstahl 11y ago|0 comments
18.
32bit integer compression algorithms(upscaledb.com)
2 points by cruppstahl 11y ago|0 comments
19.
by cruppstahl 11y ago
thanks :) Will try to figure out how to fix this.
20.
by cruppstahl 11y ago
I like the VLDB papers, and papers of similar conferences. But most of upscaledb's architecture is auto-didactic. edit: this is a good book: http://db.cs.berkeley.edu/papers/fntdb07-architecture.pdf I hope my sale
21.
by cruppstahl 11y ago
Engineering team lead. My side project is an embedded key/value database: http://upscaledb.com
22.
by cruppstahl 11y ago
Yes, Simdcomp has faster encryption/decryption, but with Delta compression. FOR is a bit simpler and has faster random access.
23.
by cruppstahl 11y ago
Absolutely not for me.
24.
Show HN: Fast integer compression library in C(github.com)
45 points by cruppstahl 11y ago|7 comments
25.
Show HN: Fast integer compression library in C(github.com)
6 points by cruppstahl 11y ago|1 comments
26.
by cruppstahl 12y ago
hamsterdb http://hamsterdb.com a embedded key-value database with storage structures and algorithms similar to column store databases. basically you can create your own column store database in your application. Right now i&#x27
27.
by cruppstahl 12y ago
That's an interesting webpage. it has a hidden google ads-field in an iframe. I'm not web-savy enough to fully understand how it works. The "click me as often as you can" contents for sure generate a lot of clicks. geniu
28.
by cruppstahl 12y ago
I think that makes sense. thank you for your comment.
29.
by cruppstahl 12y ago
I'm not sure what is cheaper, i'll figure it out. Thanks for your comment!
30.
by cruppstahl 12y ago
Earlier versions used GPL and dual-licensing, and so far the customers are startups and smaller companies, not big enterprises. I am pretty sure that the GPL version was used a lot in commercial products; that was one of the reasons why I c

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