Lua is a great programming language and I use it as embedded scripting language in
What impresses me most it's flexibility. What ever I come up with is only a few lines away ... and I have crazy ideas. Like profiling lua scripts with KCacheGrind.
For profiling lua-scripts you can use
[Read more]
This is my personal whishlist for MySQL.
Please let me know if I'm wrong or if there is a workaround for
any of these items.
1. Per user and/or per database quota
Would very useful in setups for shared hosting. This would also
prevent one database from bringing down the whole server.
Separate tablespaces on different mountpoint can ease the pain,
but I consider that a nasty hack.
2. External authentication
I've seen numerous scripts which fetch the authentication info
from ldap, a file, another database or some other authentication
store. This should be integrated into mysql. The mysql grant
tables should be pluggable so it is possible to write a custom
authentication plugin. We already have plugable engines and
function (UDF) so this shouldn't be that hard is it?
3. Database locator
So you've got hundreds of servers.... and a multitude of
databases. How to connect to …
This is my personal whishlist for MySQL.
Please let me know if I'm wrong or if there is a workaround for
any of these items.
1. Per user and/or per database quota
Would very useful in setups for shared hosting. This would also
prevent one database from bringing down the whole server.
Separate tablespaces on different mountpoint can ease the pain,
but I consider that a nasty hack.
2. External authentication
I've seen numerous scripts which fetch the authentication info
from ldap, a file, another database or some other authentication
store. This should be integrated into mysql. The mysql grant
tables should be pluggable so it is possible to write a custom
authentication plugin. We already have plugable engines and
function (UDF) so this shouldn't be that hard is it?
3. Database locator
So you've got hundreds of servers.... and a multitude of
databases. How to connect to …
Today I saw a case where MySQL server is writing its binlog entries to the error log file ‘mysqld.err’ instead of writing it to regular binlog. This is happening with MySQL version 4.0.26 and not sure how it was triggered.
I am guessing it could be because the file handles got swapped, it can not be a memory overrun or anything else as I can see the error log is getting the right binlog entries. I am still trying to find what could have caused this to happen. This happened twise so far from the same property with the same setup; even though there is more than an year in between. If you restart the server or upon issuing FLUSH LOGS, everything will be back to normal.
I’m setting up my first mysql cluster, and just wanted some clarification on a few things.
In the manual, it says:
Online schema changes. It is not possible to make online schema changes such as those accomplished using ALTER TABLE or CREATE INDEX, as the NDB Cluster engine does not support autodiscovery of such changes. (However, you can import or create a table that uses a different storage engine, and then convert it to NDB using ALTER TABLE tbl_name ENGINE=NDBCLUSTER. In such a case, you must issue a FLUSH TABLES statement to force the cluster to pick up the change.)
MySQL Cluster Exclusive Limitations
However, on another cluster limitations page, it says:
DDL operations. DDL operations (such as CREATE TABLE or ALTER TABLE) are not safe from data node failures. …
[Read more]I ran into something with mysql cluster today which boggles my mind. On http://dev.mysql.com/doc/refman/5.0/en/mysql-cluster-config-params-ndbd.html page, it is documented that if we you change datamemory parameter in the config.ini under mysql-cluster like below, you would have to restart nodes to reread the configuration. [NDBD] id=2 HostName=10.0.0.2 # the IP of the first data node DataMemory=6G IndexMemory=512M But when I tried the: [...] …
[Read more]Microsoft and Kyocera sign patent agreement. Volantis goes open. UnivaUD launches Grid.org community. (and more)
Microsoft and Kyocera Mita Enter Broad Patent Cross-Licensing Agreement, Microsoft / Kyocera Mita (Press Release)
Volantis Removes Price as Barrier for Enterprise Mobile Content Development and Delivery, Volantis (Press Release)
New Open Source Grid and Cluster Community Launches, UnivaUD (Press Release)
Red Hat and Platform Computing Collaborate to Deliver Integrated HPC Solution, Red Hat / Platform Computing …
[Read more]Lua is a great programming language and I use it as embedded scripting language in
What impresses me most it's flexibility. What ever I come up with is only a few lines away ... and I have crazy ideas. Like profiling lua scripts with KCacheGrind.
For profiling lua-scripts you can use
[Read more]Thank you Frankfurt, what an evening! Thanks a lot for the invitation and my trip-sponsors. In fact the people and venue were so nice, I am seriously looking for an excuse to go again.
For housekeeping, here are the promised slides (PDF, 0.662 MB, sans images). In Some Context I wrote:
I rarely see the point of posting the slides of a presentation for people who didn’t see the original presentation. Yet, this is often requested. I don’t have a problem with posting my […] slides […], but they are of little value without context and I do have a problem with posting things of little value, so here’s the context.
And it goes on to comment the slides I used for my CouchDB presentation in Zurich. The new slides are …
[Read more]
MySQL internally has been debating "what are release criteria"
internally. This has me thinking about release criteria and what
it means in open source.
Right now I am working my way toward stable versions of the
Memecache Engine, and libmemcached.
libmemcached is moving forward very rapidly at this point.
Releases occur about once a week at the moment, and I've got
enough feedback to know that a number of users (more then 10,
less then 50) are pulling heavily off the Mercurial download
server. Jedi build their own light-sabers, and Jedi pull open
source directly from revision control systems.
A few observations on this:
My users are using RSS. This is the first time I have
taken a brand new …