Galera Load Balancer: new rpm for glb 0.9.2

Codership released a new version of the load balancer for Galera. I made new rpms but I forgot to share them ;)

Here they are !

This new version provides ] a "single" balancing policy where all connections are directed to a single destination chosen by highest weight, a --top option that forces balancing only between the destinations with the highest weight, and a SO_KEEPALIVE option on destination connections (default: on) for timely detection of the destination failure.

CentOS 6 very slow with Vagrant

I use Vagrant to test almost everything. But since I upgraded to VirtuabBox 4.2.x and CentOS 6 as guess OS, I had the impression that everything was slower... and I get use to it...

But this week-end while preparing selinux policies for Percona XtraDB Cluster, I noticed that it was really slow.... really really very very slooooow :'-(

And I found the reason ! I first tried to add some kernel parameters like :

noacpi 
noapic 
divider=10 
notsc

But that didn't help.

Then I just enabled IO APIC on the VM's configuration and it worked much faster ! The boot of the machine was faster and in my case loading selinux policies too !

Have a look to the difference:

Without IO APIC:

[root@node2 ~]# time semodule -i percona-xtradb-cluster-full.pp

real	6m3.646s
user	1m34.430s
sys	3m42.805s

With IO APIC:

[root@node2 ~]# time semodule -i percona-xtradb-cluster-full.pp

real	0m14.611s
user	0m13.829s
sys	0m0.769s

To enable IO APIC from Vagrant, these are the parameters to use in your Vagrantfile:

config.vm.customize ["modifyvm", :id, "--memory", "256", "--ioapic", "on"]

Percona XtraDB Cluster init script for Debian/Ubuntu patch

On mysqlperformanceblog, I wrote on what was an easy solution to initialize a PXC cluster without modifying the configuration file (my.cnf) but only by providing a parameter to the init script. (link to that post) Unfortunately, this works only on RedHat systems (including CentOS, Fedora...

For Debian/Ubuntu, I wrote a minimal patch allowing that. The patch is attached to this post.

Enjoy !

hamster-time-tracker for Fedora 18

To track my time I used hamster-applet with the previous version of Fedora and I really liked it. It integrates perfectly with gtg.

This project hasn't be ported to Fedora 18, see bug 882788. I decided then to package the latest version of the project.

The git repo is available here.

You can see some screenshots here.

If you enjoy or discover this cool project, I'm happy to make it available for Fedora 18.

[UPDATE] I added the packages for F19 ;-)

GTG 0.3

Getting Things GNOME! has been released on November 6th but I was able to test it only tonight ;-)

So far, I'm very pleased by this release and to be honest this seems to be the first time synchronization with Remember the Milk is working (I used it on my n900 and I plan to use it know on my android.... but I need to wait 22h before next sync)

I've also installed the integration with gnome-shell very quickly and it seems awesome !

The development team as done a very nice job...

If you plan to test it, I've packaged this release for Fedora 17.

Percona Playback – new non official rpm for CentOS

Recently (yesterday), I faced a problem with percona-playback when I tried to use a slow query log (captured on a customer's server) and it fails dramatically. The log files was 2.3G and the second query was already returning an error :-(

I seemed that I hit a bug that Aurimas, my colleague at Percona, already reported (bug 1035217): queries written on multi lines don't work !

My C++ knowledge is very old and also very limited, so I tried to understand and fix this issue myself. Mushu (dbasquare) already faced this problem and started to fix it before giving up as he needed to run it on Slowaris... Gently he sent me his patch that I modified to support my slow query log:

  • queries on multi-lines
  • queries being only a ; (semi-colon)
  • queries finishing by another character than ; (with comments for example)

Attached to this post, you can find the rpm for CentOS 6 including that patch.

replication-booster and mysql-replication-listener rpm’s

As I wanted to test in my vagrant environment Yoshinori's MySQL replication booster, I needed to create rpms to be able to install it quickly and easily on those virtual machine without compiling it on the vm's.

So if you are interested in this nice replication solution and you are lazy to compile it, you can use my rpm's listed bellow.

Some links about the project:

mysql replication listener's rpm was built using modified specs from https://bitbucket.org/winebarrel/ruby-binlog/downloads

Update

I added the src.rpm as requested by nvidhive on #percona freenode.

sysbench 0.5 for CentOS 6

During my work I sometimes need to perform some benchmarks. I usually use sysbench. The version provided in EPEL for CentOS is old and I wanted to benefit from all the new features of the latest version from launchpad maintained by my colleague Alexey. But as I don't want to install bzr and devel packages and then recompile each time, I decided to make an rpm. I think some people could find it useful so I share it. Enjoy !

[update] I made a new package that also includes the lua files for db tests.

[update] New package from last bzr trunk where bug related to --tx-rate has been fixed (requested by my colleague Jay for his Percona Live New York tutorial about XtraDB Cluster

As MySQL Community Manager, I am an employee of Oracle and the views expressed on this blog are my own and do not necessarily reflect the views of Oracle.

You can find articles I wrote on Oracle’s blog.

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