Convert file I/O into pipe I/O with /dev/fd
Some Unix commands read data from files or write data to files,
without offering an obvious way to use them as part of a pipeline.
How can you write a program to interact with such a command
in a streaming fashion?
This would allow your program and the command run concurrently,
without the storage and I/O overhead of a temporary file.
You could create and use a named pipe, but this is a clunky solution,
requiring you to create and destroy a unique underlying file name.
Here’s a better approach.
Continue reading "Convert file I/O into pipe I/O with /dev/fd"Last modified: Saturday, December 14, 2019 3:19 pm
Pia Betton on Service Design
I attended an excellent talk by Pia Betton on
service design,
which according to Wikipedia
is the activity of planning and organizing people, infrastructure, communication and material components of a service in order to improve its quality and the interaction between the service provider and its customers.
Here are my notes.
Continue reading "Pia Betton on Service Design"Last modified: Thursday, December 5, 2019 8:00 pm
How to monitor MySQL / MariaDB query progress
The progress indicator of MySQL or MariaDB long-running commands and queries is
extremely extremely and frustratingly coarse.
In an index update I’m running now it was stuck in the same state for
more than three hours.
Thankfully, the pmonitor tool allows us to
precisely monitor the progress of many commands.
Here’s an example of its application on MariaDB.
Continue reading "How to monitor MySQL / MariaDB query progress"Last modified: Sunday, November 3, 2019 2:13 pm
So, you’re chairing a conference session?
Earlier today a first-time session chair asked me for tips on chairing
his session.
With conference presentations becoming shorter and more packed,
I realized that the task of the session chair has become more
demanding.
Here’s some advice.
Continue reading "So, you’re chairing a conference session?"Last modified: Thursday, May 30, 2019 0:41 am
