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Showing entries 1 to 10 of 111 10 Older Entries

Displaying posts with tag: Insight for Developers (reset)

MySQL QA Episode 9: Reducing Testcases for Experts: multi-threaded reducer.sh
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Welcome to MySQL QA Episode 9. This episode will go more in-depth into reducer.sh: Reducing Testcases for Experts: multi-threaded reducer.sh

We will explore how to use reducer.sh to do true multi-threaded testcase reduction – a world’s first.

Topics:

  1. Expert configurable variables & their default reducer.sh settings
    1. PQUERY_MULTI
    2. PQUERY_MULTI_THREADS
    3. PQUERY_MULTI_CLIENT_THREADS
    4. PQUERY_MULTI_QUERIES
    5. PQUERY_REVERSE_NOSHUFFLE_OPT

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MySQL QA Episode 8: Reducing Testcases for Engineers: tuning reducer.sh
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Welcome to MySQL QA Episode 8: Reducing Testcases for Engineers: tuning reducer.sh

  1. Advanced configurable variables & their default/vanilla reducer.sh settings
    1. FORCE_SKIPV
    2. FORCE_SPORADIC
    3. TIMEOUT_COMMAND & TIMEOUT_CHECK
    4. MULTI_THREADS
    5. MULTI_THREADS_INCREASE
    6. QUERYTIMEOUT
    7. STAGE1_LINES
    8. SKIPSTAGE
    9. FORCE_KILL
  2. Some examples
    1. FORCE_SKIPV/FORCE_SPORADIC
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MySQL QA Episode 7: Reducing Testcases for Beginners – single-threaded reducer.sh!
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Welcome to MySQL QA Episode #7 – Reducing Testcases for Beginners: single-threaded reducer.sh!

In this episode we’ll learn how to use reducer.sh. Topics discussed;

  1. reducer.sh introduction/concepts
  2. Basic configurable variables & their default reducer.sh settings
    1. INPUTFILE options
    2. MODE=x
    3. TEXT=”text”
    4. WORKDIR_LOCATION & WORKDIR_M3_DIRECTORY
    5. MYEXTRA
    6. MYBASE
    7. PQUERY_MOD & PQUERY_LOC
    8. MODE5_COUNTTEXT, …
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MySQL QA Episode 3: How to use the debugging tool GDB
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Welcome to MySQL QA Episode 3: “Debugging: GDB, Backtraces, Frames and Library Dependencies”

In this episode you’ll learn how to use debugging tool GDB. The following debugging topics are covered:

1. GDB Introduction
2. Backtrace, Stack trace
3. Frames
4. Commands & Logging
5. Variables
6. Library dependencies
7. c++filt
8. Handy references
– GDB Cheat sheet (page #2): https://goo.gl/rrmB9i
– From Crash to testcase:  …








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MySQL QA Episode 2: Build a MySQL server – Git, Bazaar, Compiling & Build tools
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Welcome to MySQL QA Episode 2: Build a MySQL Server – Git, Bazaar (bzr), Compiling, and Build Tools

In this episode you’ll learn how to build Percona Server and/or MySQL Server for QA purposes & more in this short 25 minute tutorial.

In HD quality (set your player to 720p!)

To watch the other episodes in this series, see the MySQL QA & Bash Linux Training Series post. If you missed MySQL QA Episode 1, it was titled “Bash/GNU Tools & Linux Upskill & …

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pquery binaries with statically included client libs now available!
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After we released pquery to the community, and as we started logging bug reports with pquery testcases, it quickly became clear that pquery binaries with statically compiled-in client libraries would be of great convenience, both for ourselves and for the community.

(If you haven’t heard about pquery yet, read the pquery introduction blog post, come and join the …

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More on (transactional) MySQL metadata locks
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Two years ago Ovais Tariq had explained in detail what kinds of problems existed before MySQL introduced metadata locks in 5.5.3 and how these locks help to prevent them. Still, some implications of metadata locking in MySQL remain unclear for users – DBAs and even software developers that target recent MySQL versions. I’ve decided to include a slide or two into the …

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MySQL QA Episode 1: Bash/GNU Tools & Linux Upskill & Scripting Fun
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MySQL QA Episode #1: Bash/GNU Tools & Linux Upskill & Scripting Fun

This episode consists of 13 parts, and an introduction. See videos below

In HD quality (set your player to 720p!)

Introduction

Part 1: echo, ls, cp, rm, vi, cat, df, du, tee, cd, clear, uname, date, time, cat, mkdir

Part 2: find, wc, sort, shuf, tr, mkdir, man, more

Part 3: Redirection, tee, stdout, stderr, /dev/null, cat

Part 4: Vars, ‘ vs “, $0, $$, $!, screen, chmod, chown, export, set, whoami, sleep, …

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Free MySQL QA & Bash/Linux Training Series
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Welcome to the MySQL QA Training Series!

If you have not read our introductory blog post on pquery yet, I’d recommend reading that one first to get a bit of background. The community is enthuastic about pquery, and today I am happy to announce a full training series on pquery and more. Whether you are a Linux or MySQL newbie or a seasoned QA engineer, there is something here for you. From Bash scripting (see episode 1 below), to every aspect of the new pquery framework, it is my hope that you enjoy this …

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The future of MySQL quality assurance: Introducing pquery
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Being a QA Engineer, how would you feel if you had access to a framework which can generate 80+ crashes – a mix of hitting developer introduced assertions (situations that should not happen), and serious unforeseen binary crashes – for the world’s most popular open source database software – each and ever hour? What if you could do this running on a medium spec machine – even a laptop?

The seniors amongst you may object “But… generating a crash or assertion is one thing – creating a repeatable testcase for the same is quite another.”

Introducing pquery, mtr_to_sql, reducer.sh (the pquery-enabled …

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Showing entries 1 to 10 of 111 10 Older Entries

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