Weez.com » data http://www.weez.com Solving everyday practical LAMP problems... one at a time Fri, 10 Feb 2012 23:07:33 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 Data URI http://www.weez.com/2012/02/data-uri/ http://www.weez.com/2012/02/data-uri/#comments Tue, 07 Feb 2012 03:27:28 +0000 Abidoon http://www.weez.com/2012/02/data-uri/
Package:
Summary:
Generate data URL to embed binaries in links
Groups:
Author:
Description:
This class can generate data URL to embed binaries in links…

Read more at http://www.phpclasses.org/package/7326-PHP-Generate-data-URL-to-embed-binaries-in-links.html



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]]> http://www.weez.com/2012/02/data-uri/feed/ 0 ApPHP Data Grid http://www.weez.com/2012/02/apphp-data-grid/ http://www.weez.com/2012/02/apphp-data-grid/#comments Mon, 06 Feb 2012 03:24:49 +0000 Abidoon http://www.weez.com/2012/02/apphp-data-grid/
Autosuggest
Package:
Summary:
Display database query results in a HTML table
Groups:
Author:
Description:
This class can display database query results in a HTML table…

Read more at http://www.phpclasses.org/package/7334-PHP-Display-database-query-results-in-a-HTML-table.html



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]]> http://www.weez.com/2012/02/apphp-data-grid/feed/ 0 ApPHP Data Form http://www.weez.com/2012/02/apphp-data-form/ http://www.weez.com/2012/02/apphp-data-form/#comments Sun, 05 Feb 2012 03:28:09 +0000 Abidoon http://www.weez.com/2012/02/apphp-data-form/
General View
Package:
Summary:
Compose, generate and filter HTML forms
Groups:
Author:
Description:
This package can compose, generate and filter HTML forms…

Read more at http://www.phpclasses.org/package/7332-PHP-Compose-generate-and-filter-HTML-forms.html



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]]> http://www.weez.com/2012/02/apphp-data-form/feed/ 0 How Percona Server handles data corruption more gracefully http://www.weez.com/2012/01/how-percona-server-handles-data-corruption-more-gracefully/ http://www.weez.com/2012/01/how-percona-server-handles-data-corruption-more-gracefully/#comments Fri, 06 Jan 2012 18:59:39 +0000 Abidoon http://www.weez.com/2012/01/how-percona-server-handles-data-corruption-more-gracefully/ I got a question a while ago about how Percona Server handles corrupted data more gracefully than the standard MySQL server from Oracle. The short version is that it won’t crash the whole server.

With standard MySQL from Oracle, if any page of data in InnoDB is found to be corrupt, the entire instance will crash forcefully. This is a good policy if you want to treat your entire data set as a single unit, which is either usable or not. However, this does not reflect reality for many users, who have a lot of data collocated in a single instance. In such cases, it is desirable for the server to continue running, so the corruption in one database does not affect the others.

Percona Server handles corruption more gracefully, if you enable it, by simply marking the single table as corrupt, and not crashing the entire server.

The relevant documentation is here.

View full post on MySQL Performance Blog

]]> http://www.weez.com/2012/01/how-percona-server-handles-data-corruption-more-gracefully/feed/ 0 Capturing data in a simplified form post http://www.weez.com/2011/10/capturing-data-in-a-simplified-form-post/ http://www.weez.com/2011/10/capturing-data-in-a-simplified-form-post/#comments Fri, 28 Oct 2011 03:28:20 +0000 Abidoon http://www.weez.com/2011/10/capturing-data-in-a-simplified-form-post/
Package:
Summary:
Validate and retrieve POST values into constants
Groups:
Author:
Description:
This can be used to validate and retrieve POST values into constants…

Read more at http://www.phpclasses.org/package/7193-PHP-Validate-and-retrieve-POST-values-into-constants.html



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]]> http://www.weez.com/2011/10/capturing-data-in-a-simplified-form-post/feed/ 0 Find where your data is replicated, win a Percona Live ticket http://www.weez.com/2011/10/find-where-your-data-is-replicated-win-a-percona-live-ticket/ http://www.weez.com/2011/10/find-where-your-data-is-replicated-win-a-percona-live-ticket/#comments Fri, 21 Oct 2011 17:51:43 +0000 Abidoon http://www.weez.com/2011/10/find-where-your-data-is-replicated-win-a-percona-live-ticket/ Percona Live London starts on Monday, so this is the last in the series of free-Percona-Live tickets we’ll give away. But first — have you ever wondered what servers are in your MySQL replication hierarchy?

We have, too. As consultants, a lot of times we need to get a quick overview of the whole replication hierarchy and specific things about it, such as replication filters, versions, whether replication is running, how far behind it is, and so on. These things are very important for making sure that we don’t break something in the system, get blamed for breaking replication when it was already broken, and so on.

So we built pt-slave-find (it was actually born as mk-slave-find, ages ago before I even worked at Percona). It automatically detects and connects to every server in the replication hierarchy, and prints out a summary of each one’s most important details.

Here’s an example. Notice how one of the servers has a replication filter on it, the servers don’t all have the same version installed, and some are in the AWS cloud. All of these things are important to know — if we run a checksum on the non-cloud servers, for example, we could make the cloud servers fall far behind in replication.

$ perl pt-slave-find localhost
localhost
Version         5.1.57-rel12.8-log
Server ID       6275
Uptime          10+01:18:10 (started 2011-10-08T19:22:04)
Replication     Is a slave, has 5 slaves connected, is not read_only
Filters
Binary logging  MIXED
Slave status    0 seconds behind, running, no errors
Slave mode      IDEMPOTENT
Auto-increment  increment 4, offset 2
InnoDB version  1.0.16-12.8
+- 10.124.62.76
   Version         5.1.57-rel12.8-log
   Server ID       6276
   Uptime          12+03:35:17 (started 2011-10-06T17:04:57)
   Replication     Is a slave, has 2 slaves connected, is read_only
   Filters
   Binary logging  MIXED
   Slave status    0 seconds behind, running, no errors
   Slave mode      IDEMPOTENT
   Auto-increment  increment 4, offset 2
   InnoDB version  1.0.16-12.8
   +- 10.124.62.78
      Version         5.1.57-rel12.8-log
      Server ID       6278
      Uptime          12+03:53:59 (started 2011-10-06T16:46:15)
      Replication     Is a slave, has 0 slaves connected, is read_only
      Filters
      Binary logging  MIXED
      Slave status    0 seconds behind, running, no errors
      Slave mode      IDEMPOTENT
      Auto-increment  increment 4, offset 2
      InnoDB version  1.0.16-12.8
+- 10.124.62.77
   Version         5.1.57-rel12.8-log
   Server ID       6277
   Uptime          12+04:00:24 (started 2011-10-06T16:39:50)
   Replication     Is a slave, has 0 slaves connected, is read_only
   Filters
   Binary logging  MIXED
   Slave status    0 seconds behind, running, no errors
   Slave mode      IDEMPOTENT
   Auto-increment  increment 4, offset 2
   InnoDB version  1.0.16-12.8
+- 10.124.62.86
   Version         5.1.57-rel12.8-log
   Server ID       6286
   Uptime          12+02:52:15 (started 2011-10-06T17:47:59)
   Replication     Is a slave, has 4 slaves connected, is not read_only
   Filters
   Binary logging  MIXED
   Slave status    0 seconds behind, running, no errors
   Slave mode      STRICT
   Auto-increment  increment 1, offset 1
   InnoDB version  1.0.16-12.8
   +- [redacted].compute-1.amazonaws.com
      Version         5.1.43-60.hardy.7-log
      Server ID       3141592
      Uptime          11:29:58 (started 2011-10-18T09:10:16)
      Replication     Is a slave, has 0 slaves connected, is not read_only
      Filters         replicate_wild_ignore_table=foo%.mount%
      Binary logging  ROW
      Slave status    0 seconds behind, running, no errors
      Slave mode      STRICT
      Auto-increment  increment 1, offset 1
      InnoDB version  1.0.6-unknown
   +- [redacted].compute-1.amazonaws.com
      Version         5.1.43-60.hardy.7-log
      Server ID       19924124
      Uptime          12+23:32:10 (started 2011-10-05T21:08:04)
      Replication     Is a slave, has 1 slaves connected, is not read_only
      Filters
      Binary logging  STATEMENT
      Slave status    0 seconds behind, running, no errors
      Slave mode      STRICT
      Auto-increment  increment 1, offset 1
      InnoDB version  1.0.6-unknown
   +- [redacted].compute-1.amazonaws.com
      Version         5.1.43-60.hardy.7-log
      Server ID       207
      Uptime          12+23:40:41 (started 2011-10-05T20:59:34)
      Replication     Is a slave, has 1 slaves connected, is not read_only
      Filters
      Binary logging  STATEMENT
      Slave status    0 seconds behind, running, no errors
      Slave mode      STRICT
      Auto-increment  increment 1, offset 1
      InnoDB version  1.0.6-unknown
   +- [redacted].compute-1.amazonaws.com
      Version         5.1.43-60.hardy.7-log
      Server ID       330612
      Uptime          12+23:44:28 (started 2011-10-05T20:55:47)
      Replication     Is a slave, has 0 slaves connected, is not read_only
      Filters
      Binary logging  STATEMENT
      Slave status    0 seconds behind, running, no errors
      Slave mode      STRICT
      Auto-increment  increment 1, offset 1
      InnoDB version  1.0.6-unknown
+- [redacted].compute-1.amazonaws.com
   Version         5.1.43-60.hardy.7-log
   Server ID       215924
   Uptime          12+08:15:08 (started 2011-10-06T12:25:08)
   Replication     Is a slave, has 6 slaves connected, is read_only
   Filters
   Binary logging  MIXED
   Slave status    0 seconds behind, running, no errors
   Slave mode      IDEMPOTENT
   Auto-increment  increment 4, offset 3
   InnoDB version  1.0.6-unknown
+- 10.153.116.5
   Version         5.1.57-rel12.8-log
   Server ID       1165
   Uptime          20+09:44:46 (started 2011-09-28T10:55:30)
   Replication     Is a slave, has 0 slaves connected, is read_only
   Filters
   Binary logging  MIXED
   Slave status    0 seconds behind, running, no errors
   Slave mode      STRICT
   Auto-increment  increment 4, offset 3
   InnoDB version  1.0.16-12.8

So that’s how you can quickly find out what’s in your replication hierarchy, how it’s configured, and a few basic bits of status information.

Now how do you win a free ticket to Percona Live London? Watch our @percona Twitter stream to find out!

View full post on MySQL Performance Blog

]]> http://www.weez.com/2011/10/find-where-your-data-is-replicated-win-a-percona-live-ticket/feed/ 0 Data Grid nav http://www.weez.com/2011/10/data-grid-nav/ http://www.weez.com/2011/10/data-grid-nav/#comments Tue, 18 Oct 2011 03:25:23 +0000 Abidoon http://www.weez.com/2011/10/data-grid-nav/
Package:
Summary:
Display MySQL query results in an HTML table
Groups:
Author:
Description:
This class can display MySQL query results in an HTML table…

Read more at http://www.phpclasses.org/package/7175-PHP-Display-MySQL-query-results-in-an-HTML-table.html



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]]> http://www.weez.com/2011/10/data-grid-nav/feed/ 0 Data Dictionary http://www.weez.com/2011/06/data-dictionary/ http://www.weez.com/2011/06/data-dictionary/#comments Mon, 20 Jun 2011 03:24:50 +0000 Abidoon http://www.weez.com/2011/06/data-dictionary/
Package:
Summary:
Output the structure of a MySQL database
Groups:
Author:
Description:
This package can output the structure of a MySQL database…

Read more at http://www.phpclasses.org/package/6995-PHP-Output-the-structure-of-a-MySQL-database.html



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]]> http://www.weez.com/2011/06/data-dictionary/feed/ 0 Marcus Eriksson: Visualizing data in real time using drizzle and rabbitmq, DEMO! http://www.weez.com/2011/04/marcus-eriksson-visualizing-data-in-real-time-using-drizzle-and-rabbitmq-demo/ http://www.weez.com/2011/04/marcus-eriksson-visualizing-data-in-real-time-using-drizzle-and-rabbitmq-demo/#comments Thu, 07 Apr 2011 20:06:44 +0000 Abidoon http://www.weez.com/2011/04/marcus-eriksson-visualizing-data-in-real-time-using-drizzle-and-rabbitmq-demo/ A couple of weeks ago, when Mozilla released firefox 4, i watched glow.mozilla.org – a site made to visualize the firefox downloads in real time. I figured this could be quite a neat use case for my old drizzle to web socket replicator.

So, the compontents involved:

The basic flow is this:

  1. 10 inserts per second are executed in the drizzle database using drizzle-jdbc, these inserts contain a random IP address
  2. Drizzle does its magic and packages up each insert as a google protobuf transaction message
  3. The rabbitmq plugin picks up the message and publishes it to a RabbitMQ server
  4. RabbitReplication consumes the message from RabbitMQ and maps it onto an annotated java object. This gives alot of flexibility to the rabbitreplication user since you can manipulate the information any way you want, in this example i extract a longitude and latitude value from the IP address using MaxMind GeoLite City. Have a look at row the “setSomething()” method in the ExampleRepl.java file. This file is something a rabbitreplication end user would implement and provide
  5. The java object is serialized to json
  6. The json string is published to all connected clients
  7. A javascript on the page takes the lat/lng-values and maps these onto a google map
  8. The same javascript appends some of the raw data to a table

So, I’m hoping the little demo i’m linking below shows some of the extreme flexibility of the Drizzle replication. This, for me, is the unique selling point for Drizzle. Also, if anyone has an actual production use case for this, i’d be extremely happy to help implement it!


http://demo.rabbitreplication.org

(Thanks to Rackspace for hosting!)

View full post on Planet Drizzle

]]> http://www.weez.com/2011/04/marcus-eriksson-visualizing-data-in-real-time-using-drizzle-and-rabbitmq-demo/feed/ 0 Data Base Process http://www.weez.com/2011/04/data-base-process/ http://www.weez.com/2011/04/data-base-process/#comments Thu, 07 Apr 2011 03:26:11 +0000 Abidoon http://www.weez.com/2011/04/data-base-process/
Package:
Summary:
Access records and manage MySQL database tables
Groups:
Author:
Description:
This class can access records and manage MySQL database tables…

Read more at http://www.phpclasses.org/package/6873-PHP-Access-records-and-manage-MySQL-database-tables.html



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]]> http://www.weez.com/2011/04/data-base-process/feed/ 0