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Displaying posts with tag: hscale (reset)

Current project status – HSCALE
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A lot of people keep asking me about the status of HSCALE so I thought it is best to just write about it.
Since I am waiting for the next GPL release of MySQL Proxy I concentrate on other things, both project-related and not project-related.

Continuous integration and test strategy enhancements

First of all there is a CI server up for almost 3 months now. Check out teamcity.hscale.org (Login as guest user). I also introduced a lint-process to discover bugs in my LUA code which arise mostly by mistyping variable …


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LuaSQL fetches results about 15% faster than MySQL Proxy?
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While evaluating LuaSQL as backend connection replacement I came across this. I did a quick performance test using mysqlslap and it showed that just reading and copying the result can be significantly faster with LuaSQL.

Benchmark details

What I did was just sending the query to the backend and building up a new result-set in LUA.

This is the …

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Version 0.3 of HSCALE is almost in the door
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After working on build and test improvements (for example incorporating lualint and LuaCov) as well as other lua “side-projects” (i.e. Log4LUA) we are running towards HSCALE 0.3.

The focus of the forthcoming version 0.3 of HSCALE is Dictionary Based Partition Lookup. Using this partition lookup module lets you take full control over how your partitions are created and where they are actually located.

Update: Dictionary Based Partition …

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More fun with LUA - Introducing Log4LUA
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UPDATE Log4LUA 0.2 released. Go to the project page.

After the dust about backend connection handling in MySQL Proxy had settled, I begun working on other parts of HSCALE again. (I’ll return to the backend handling later after talking to Jan Kneschke about their plans.)

One of the issues that bothered me the most was logging. Until now I just had used a simple debug

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MySQL Proxy vs. HSCALE
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Recently I added the first code to support multiple MySQL backends in HSCALE (see svn.hscale.org). As a “side note” I have to thank Giuseppe Maxia for MySQL Sandbox which made multi server testing a bliss!

While coding this I started to feel that writing HSCALE on top of MySQL Proxy is no more as easy and clean as it started out to be. And finally I reached the point where I have to say:

HSCALE (and maybe other advanced multi-server applications) and (current) MySQL Proxy don’t fit very well.

Before I go into …

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HSCALE 0.2 released and new project web page
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The main focus of version 0.2 was to improve handling of almost all of SQL. So now you can issue DESC TABLE tbl_name or RENAME TABLE tbl_name TO another_tbl_name on a partitioned table and you get correct results for SHOW TABLES etc.
Other statements are rejected and we settled down for the feature set we want to provide for full partition scans.
In addition to that there are some performance improvements.

See the full list of changes.

For the …



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Update: Benchmark HSCALE with MySQL Proxy 0.7.0 (svn) against 0.6.1
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Earlier today I posted these benchmark results testing HSCALE and MySQL Proxy performance.

As Jan Kneschke (the author of MySQL Proxy) pointed out there are quite some improvements in the current development version (svn trunk). So I gave revision 369 a try.

Tests were all the same as mentioned in my previous post. And indeed we see quite dramatic improvements. While the performance of the Lua script stayed almost the same the footprint of the proxy itself sank to only 50 to 65%. Here are the numbers:

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Benchmark MySQL Proxy and HSCALE
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As part of developing HSCALE, a partitioning / sharding solution, I set up a benchmark test suite. I made it scripted and thus repeatable to monitor the progress and performance regressions during the development.

Test Suite

The test suite uses mysqlslap to benchmark the overhead of MySQL Proxy itself in real life scenario as well as the different components of HSCALE – query analyzing and query rewriting. The complete test suite is …

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Presentation Slides: Introduction to HSCALE
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No, these slides are not fresh from the User Conference in Santa Clara…

Today, I held a presentation in front of all developers and support engineers of our technical department about database partitioning, MySQL Proxy, HSCALE and the progress we are making.

Download the presentation slides here.

HSCALE 0.1 released – Partitioning Using MySQL Proxy
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As written here and here I’ve been working on a MySQL Proxy Lua module that transparently splits up tables into multiple partitions and rewriting all queries to go to the right partition.

I finally got everything together to release a 0.1 version. Go on and download, try and read more about HSCALE 0.1.

All this started out as a prototype …

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Showing entries 1 to 10 of 12 2 Older Entries

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