Cluster

This blog entry describes how to install MySQL clusters on Solaris.

MySQL cluster consist of 3 seperate types of nodes:

• SQL nodes
• Storage nodes
• Management nodes

The SQL nodes are the nodes that applications can connect to. Internally SQL nodes connect to storage nodes to  process the queries and return the result set to the end client.

The storage nodes are controlled by management nodes. They do most of the work in processing the queries.

Managment nodes manages the entire cluster. They start and stop the data and SQL nodes and manage backups.

Lets start with the simplistic installation where all the nodes of the cluster are on the same box. Of course this is not how you would do a typical MySQL cluster installation...but this is just to get a feel of what is involved in MySQL cluster …

Cluster

This blog entry describes how to install MySQL clusters on Solaris.

MySQL cluster consist of 3 seperate types of nodes:

• SQL nodes
• Storage nodes
• Management nodes

The SQL nodes are the nodes that applications can connect to. Internally SQL nodes connect to storage nodes to  process the queries and return the result set to the end client.

The storage nodes are controlled by management nodes. They do most of the work in processing the queries.

Managment nodes manages the entire cluster. They start and stop the data and SQL nodes and manage backups.

Lets start with the simplistic installation where all the nodes of the cluster are on the same box. Of course this is not how you would do a typical MySQL cluster installation...but this is just to get a feel of what is involved in MySQL cluster …

I’ve been asked by a number of people on how to do an upgrade from DRBD version 0.7 to DRBD 8. This upgrade does necessitate some minimal service down time, but it’s really not rocket science. And no, it does not force you to sync all of your data all over again.

Here’s my quick write-up.

An initial word of caution

Do not, I repeat do not attempt your upgrade unless you have at least read this blog entry to the finish.

Getting ready

First, you need to make sure that you have both your DRBD 8 userland binaries and kernel module ready to install. For our support customers, this means that you simply download two RPMs (or .debs) from our support web site. Make sure you have the right packages; you want those that match your system architecture and (for the kernel module) also your running kernel. Also, make sure you get …

Quick experiment with online changing of enabling/disabling compressed backups and local checkpoints (LCPs).

Backup is incredibly trivial and correct (even have some nodes do compressed, some not).

LCPs are a bit trickier when it comes to restore… currently how the code sits is that a block using the compressed file interface in NDBFS must specify if it wants to use the compressed read/write interface or not. So when you have LCPs that differ in compressed/non-compressed than the current config file setting, you’re not going to be able to restore them (although setting CompressedLCP=1 should let you restore either compressed or non-compressed LCPs).

At some point, I’ll probably move AsyncFile (our async file IO class) to just use azio alway, and modify azio to be transparent for non-compressed files…. I just have to fix up azio for direct io.

this is the mysql developers working hard at our developer conference in heidelberg, germany.

okay, not really. this is just a shot of a park on the shores of the neckar river in heidelberg, germany, taken while we were on a boat back from our day-off excursion to the german raptor research centre.

the whole set of photos has more of heidelberg, and some of the birds from the research centre. but no shots of any developers. you will have to wait for the oktoberfest pictures for those.

my wife celia also posted her …

MySQL AB today announced its plans to optimize the MySQL Enterprise Server for the SAP NetWeaver® platform.

At the SAP® TechEd '07 event being held in Las Vegas this week, MySQL and SAP AG also announced that the sales and support of the MaxDB database will revert back to SAP, in order to unify the product's development, distribution and support under one organization. MaxDB (formerly SAP DB) is the database that powers SAP® Business ByDesign(TM), the company's recently-announced on-demand software solution for midsize companies -- in addition to SAP® Business Suite and SAP® Business All-in-One.

This release of MySQL Toolkit fixes some minor bugs, and adds major new functionality to MySQL Parallel Dump. Big News: MySQL Parallel Dump I wrote a lot more tests and cleaned up MySQL Parallel Dump a lot (fixed bugs with failed dumps not being reported, for instance) but the really big news is I added chunking functionality to it. Now you can say mysql-parallel-dump --chunksize 100000 and it will try to divide each table into chunks with 100,000 rows each.

I wanted to point out something that might not be obvious from the name: MySQL Parallel Dump can be used as a generic wrapper to discover tables and databases, and fork off worker processes to do something to them in parallel. That “something” can easily be invoking mysqlcheck – or any other program. This makes it really easy for you to do multi-threaded whatever-you-need-to-do on MySQL tables. Here’s how: mysql-parallel-dump [options] -- 'mysqlcheck --optimize %D %N' There are several things going on here:

From my good friend and anti-spam expert Tobias Eggendorfer, a note that a call for papers is now open for Safety and Security 2008 in Saarbrücken, Germany (2-4 April 2008). Sicherheit 2008 (the German name) is a conference on security and safety in computer science. Its official web page is available at http://www.sicherheit2008.de/.

This conference has a special session on email, voice over IP and SMS spam, chaired by Professor Dr. Jörg Keller, FernUniversität in Hagen (Chair) and Dr. Tobias Eggendorfer, Universität der Bundeswehr München (Co-Chair). The call-for-papers for that component is at http://pv.fernuni-hagen.de/si2008spam/cfp_en.html …

Things start rolling! mysqlnd is among the five most desired features for PHP 5.3 according to a PHP 5.3 Feature Summary email from Ilia, who - at the time of writing - was doing the release management of PHP.

Thanks everybody for your trust in mysqlnd and your support! We shall try not to disappoint you in the future and continue with the development. Of course, as the core feature mature more and more, we will try to spend time on implementing new, useful tricks and try to provide you with additional documentation, if time permits.

Meanwhile we are still looking for your feedback. Tell us about your positive and negative experiences with mysqlnd. Jürgen Krieger did so in his forums posting and concludes And i have to say that the …