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Displaying posts with tag: ARM (reset)
Fun with Bugs #37 - Bugs fixed in MySQL 5.6.27

MySQL 5.6.27 was released on September 30 formally. Source code is also available on GitHub, and I have it compiled (some users are less lucky) and running for a couple of days already. In this post I'll comment on some bugs reported by MySQL Community that are fixed there.

I'd like to start with a couple of bugs where patches were also contributed. First of all, the fix suggested by Stewart Smith in Bug #72811, "Set NUMA mempolicy for optimum mysqld performance", helps to allocate memory in a more reasonable way on NUMA-enabled systems. Previously it was like all interleaved or nothing, now there is a way to apply this only …

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Enterprise Monitor-ing the Raspberry Pi & MySQL Cluster

So, now I’ve got my Raspberry Pi’s tested, and running MySQL Cluster we’ll need some form of checking it’s up and running, as with the rest of our MySQL servers.

Monitoring via a Remote Agent

First issue, of course, is that, with my existing MEM console, I have no need to re-install MEM, but rather want to deploy an agent so that I can monitor the MySQL Cluster.
This poses it’s first problem, as there isn’t an ARM-ready agent software available. Remember, it’s not a supported platform. So what can we do? Setup a remote Enterprise Monitor agent, so that, we can monitor the MySQL Cluster, albeit at the sacrifice of not having the agent local on each Raspberry Pi, and hence, not be able to capture the o.s. data.

Config change

So, on my Ubuntu server, I go to the agent install directory:

  cd /opt/mysql/enterprise/agent/etc
  vi mysql-mypi01-agent.ini
  :1,$ …

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Enterprise Monitor-ing the Raspberry Pi & MySQL Cluster

So, now I’ve got my Raspberry Pi’s tested, and running MySQL Cluster we’ll need some form of checking it’s up and running, as with the rest of our MySQL servers.

Monitoring via a Remote Agent

First issue, of course, is that, with my existing MEM console, I have no need to re-install MEM, but rather want to deploy an agent so that I can monitor the MySQL Cluster.
This poses it’s first problem, as there isn’t an ARM-ready agent software available. Remember, it’s not a supported platform. So what can we do? Setup a remote Enterprise Monitor agent, so that, we can monitor the MySQL Cluster, albeit at the sacrifice of not having the agent local on each Raspberry Pi, and hence, not be able to capture the o.s. data.

Config change

So, on my Ubuntu server, I go to the agent install directory:

  cd /opt/mysql/enterprise/agent/etc
  vi mysql-mypi01-agent.ini
  :1,$ …

[Read more]
Enterprise Monitor-ing the Raspberry Pi & MySQL Cluster

So, now I've got my Raspberry Pi's tested, and running MySQL Cluster we'll need some form of checking it's up and running, as with the rest of our MySQL servers.

Monitoring via a Remote Agent First issue, of course, is that, with my existing MEM console, I have no need to re-install MEM, but rather want to deploy an agent so that I can monitor the MySQL Cluster. This poses it's first problem,

From 2 Management nodes down to 1 (R.Pi, Cluster n Cream spin-off)

From my testing MySQL Cluster on the Raspberry Pi’s I thought I’d share this little extract, just in case someone tries the same, some day.. somewhere.. why? I don’t know.

Ok, so when we pull the plug on one of the pi’s, we have of each component falling down, but because one of them is the arbitrator (node-id=2) then cluster falls over.

Before the ‘accident’:

  ndb_mgm -e show

Connected to Management Server at: localhost:1186
Cluster Configuration
———————
[ndbd(NDB)]     2 node(s)
id=3    @10.0.0.6  (mysql-5.5.25 ndb-7.3.0, Nodegroup: 0, Master)
id=4    @10.0.0.7  (mysql-5.5.25 ndb-7.3.0, Nodegroup: 0)

[ndb_mgmd(MGM)] 2 node(s)
id=1    @10.0.0.6  (mysql-5.5.25 ndb-7.3.0)
id=2    @10.0.0.7  (mysql-5.5.25 ndb-7.3.0) …

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From 2 Management nodes down to 1 (R.Pi, Cluster n Cream spin-off)

From my testing MySQL Cluster on the Raspberry Pi's I thought I'd share this little extract, just in case someone tries the same, some day.. somewhere.. why? I don't know.

Ok, so when we pull the plug on one of the pi's, we have of each component falling down, but because one of them is the arbitrator (node-id=2) then cluster falls over.

Before the 'accident':   ndb_mgm -e show

Connected to

Raspberry Pi, MySQL Cluster ‘n’ Cream.

Ok, so I’ve been playing around with the idea of setting up MySQL cluster on a couple of Raspberry Pi’s and this is how it has been going.

References

First of all, for anyone else who’s reading this, it’s not a new thing, I know, and I highly recommend reading A.Morgans blog, http://www.clusterdb.com/mysql-cluster/mysql-cluster-running-on-raspberry-pi/ as well as someone else’s blog: http://markswarbrick.wordpress.com/, cheers Mark.

So, to make it all possible, here’s what I bought:

Product Model Quantity
Raspberry Pi – Model B …
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Raspberry Pi, MySQL Cluster 'n' Cream.

Ok, so I've been playing around with the idea of setting up MySQL cluster on a couple of Raspberry Pi's and this is how it has been going.

References First of all, for anyone else who's reading this, it's not a new thing, I know, and I highly recommend reading A.Morgans blog, http://www.clusterdb.com/mysql-cluster/mysql-cluster-running-on-raspberry-pi/ as well as someone else's blog: http://

Log Buffer #276, A Carnival of the Vanities for DBAs

Sharing knowledge is not only beneficial to others, it also enhances one’s own knowledge and broadens the spectrum. Blogging is all about sharing and this Log Buffer Edition shares some great sharing of our bloggers around the database arena in Log Buffer #276. Oracle: Sometimes it is possible to build a very effective test case [...]

ARM based data center. Inspiring.

In a previous post I wrote ARM based servers. Since then, and thanks to all the comments and responses I got, I looked more into this ARM thing and it's absolutely fascinating...

Look at this beauty (taken from the site of Calxeda, the manufacturer):

What is it? A chip? A server? No, it's a cluster of 4 servers...

And this:

is HP Redstone Server, 288 chips, 1,152 cores (Calxeda quad-core SoC) in a 4U server “Dramatically reducing the cost and complexity of cabling and …

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