Friday Dec 12, 2008

Call for Papers for CommunityOne (New York) on March 18 2009

This year CommunityOne is being held also in New York (March 18,  2009) in addition to the CommunityOne held in San Francisco (June 1, 2009). CommunityOne is a conference sponsored by Sun Microsystems focused on open source innovation and implementation. It brings together developers, technologists and students for technical education and exchange.

The Call for Paper is on and been extended to December 19.  Since quite a bit of PostgreSQL crowd is in east coast maybe we should also put in some PostgreSQL proposals atleast for the New York event in March 2009. Any takers/suggestions?

Here is what that comes to my mind instantaneously :


Others that I missed?


Wednesday Dec 10, 2008

OpenSolaris 2008.11 and PostgreSQL 8.3

The second supported version of OpenSolaris called OpenSolaris 2008.11 is now officially launched. With the release, I guess now PostgreSQL 8.3 is now "officially" supported on OpenSolaris too (though you could have used it prior  anyway with the development releases of OpenSolaris after the initial OpenSolaris 2008.05 was released).

 Anyway let's quickly look at some tips and how-to which I think could be useful to improve the experience of PostgreSQL 8.3 with OpenSolaris 2008.11.  One way to take a quick drive of OpenSolaris 2008.11 is to also try out the new VirtualBox 2.0.6 and install OpenSolaris 2008.11 in a VM. (Note: If you do plan to access the VM from other systems then use Host Interface instead of NAT to make it easy to access it from outside.)

PostgreSQL 8.3 is not already installed once you install OpenSolaris 2008.11 from the LiveCD. This gives an opportunity for a tweak that I would highly recommend. By default OpenSolaris 2008.11 does not have option for separate ZFS dataset for /var (like Solaris 10 10/08 - U6 does). I would certainly like my PostgreSQL database to be on a separate dataset that I can control PostgreSQL snapshots  independently. Since I know the default PostgreSQL database path for PostgreSQL 8.3 on OpenSolaris is /var/postgres/8.3 I generally create a separate dataset as follows before I use pkg script to install PostgreSQL 8.3

# zfs create -o mountpoint=/var/postgres rpool/postgres

Now I am ready to install the various packages of PostgreSQL 8.3

# pkg install SUNWpostgr-83-server

# pkg install SUNWpostgr-83-client SUNWpostgr-jdbc SUNWpostgr-83-contrib

# pkg install SUNWpostgr-83-docs  SUNWpostgr-83-devel

# pkg install SUNWpostgr-83-tcl SUNWpostgr-83-pl

Now to install PGAdmin3 as follows:

# pkg install SUNWpgadmin3

Even pgbouncer is available in the repository

# pkg install SUNWpgbouncer-pg83

Now that all binaries are installed, let's look on how to get started. Generally the best way to start and stop PostgreSQL 8.3 server is via the svcadm command of OpenSolaris. The SMF manifest for PostgreSQL 8.3 is installed with SUNWpostgr-83-server, however the import of the script does not happen till the next reboot. We can always work that around by doing a quick manual update as follows:

# svccfg import /var/svc/manifest/application/database/postgresql_83.xml

This creates two entries one for 32-bit server instance and one for 64-bit server instance.

# svcs -a |grep postgres
disabled        1:14:44 svc:/application/database/postgresql_83:default_64bit
disabled        1:14:45 svc:/application/database/postgresql_83:default_32bit

Depending on your server/choice you can start the corresponding server. Or 32-bit instance may be just easier to select if there are doubts.

# svcadm enable postgresql_83:default_32bit

# svcs -a |grep postgres
disabled        1:14:44 svc:/application/database/postgresql_83:default_64bit
online          2:12:37 svc:/application/database/postgresql_83:default_32bit

# zfs list rpool/postgres
NAME             USED  AVAIL  REFER  MOUNTPOINT
rpool/postgres  30.4M  11.8G  30.4M  /var/postgres

The client psql is still not in the default path. The path /usr/postgres/8.3/bin should be in your search PATH. (or if you are using 64-bit add /usr/postgres/8.3/bin/64).

# /usr/postgres/8.3/bin/psql -U postgres postgres
Welcome to psql 8.3.4, the PostgreSQL interactive terminal.

Type:  \\copyright for distribution terms
       \\h for help with SQL commands
       \\? for help with psql commands
       \\g or terminate with semicolon to execute query
       \\q to quit

postgres=#

For people who are using PostgreSQL 8.2 on OpenSolaris 2008.05 already, there is a way to get to PostgreSQL 8.3. First you have to update your OpenSolaris 2008.05 to OpenSolaris 2008.11 image using

# pkg image-update

Then install PostgreSQL 8.3 binaries as above and also install an additional package

# pkg install SUNWpostgr-upgrade

If there are more question feel free to leave a comment.




Thursday Dec 04, 2008

PostgreSQL and Netbeans 6.5

With the release of JavaFX 1.0, a new version of Netbeans 6.5 is now also available. Let's quickly look at its current PostgreSQL Support.

The JDBC driver for PostgreSQL is integrated in Netbeans 6.5. It is  located at:

netbeans-6.5/ide10/modules/ext/postgresql-8.3-603.jdbc3.jar

As you can see it is pretty much upto sync to the latest (about a rev back since the latest is 604 build).  Clicking the Services tab of Netbeans shows Database where a new entry can be created using using the "Direct URL Entry" using the format as follows:

jdbc:postgresql://hostname/databasename

providing the user name and password for the connection and then the schema name (hint: public schema) in the Advanced Tab and press OK to create a new connection to PostgreSQL database.

Once connected clicking the expand sign which looks like  o- can  be expanded to see the Tables/Views/Procedures and more expansions can be done on Tables to see  data either using menu  options or using the SQL Editor.

With the PostgreSQL setup in place now it should be easier to program with your favorite language be it Java  or JavaFX , Python, PHP, Ruby, etc using PostgreSQL database as the backend.

( Note for myself:  Try out Greg Smith's pgtune project which uses Python with the new Netbeans's Python editor.)



Tuesday Nov 18, 2008

Quest for OpenSolaris based Appliance

Recently I burned a copy of OpenSolaris 2008.11 RC1 and used it with Songbird (using pkg install SUNWsongbird)  and Fluendo MP3 Decoder (which is free for OpenSolaris),  Flash and soon I had a setup in my bedroom which I love to call OpenSolaris Home Theatre Edition that I used to listen to my songs collection and watch online shows that I controlled via Remote Desktop  which to me was a serious contender to those Media Centers out there. 

However I realized that while I wanted to "Pump it up" for my personal usage, I really wanted to "Strip it Down" for business usage. What I meant is in order for someone to try it out with say another Open Source Software it is easier now to say try that Open Source Software pre-installed on OpenSolaris in a Virtualbox Image. However I found it very hard to do it in practice.

Say for example I want to get somebody to try out the latest version of MySQL on OpenSolaris. The easiest thing is to give them a VDI image of preinstalled version of MySQL 5.1 RC  running on OpenSolaris that somebody just double clicks and boom a virutalbox instance starts up with MySQL ready to deliver.

However there is a problem with that theory. The VDI image of OpenSolaris fresh install in a virtualbox instance is about 2.5 - 3 GB. Of course adding MySQL on top of it won't drastically increase the size but I still have a problem with the base size itself. Since the only way that this can work is to use some sort of Peer to Peer File Sharing technology as hosting and hoping people will download this DVD Size downloads without any problems is like going at 10:00am for a Thanksgiving Deal at a store that opens at 6:00am with less than 20 SKU available (Tough Luck!!).

Anyway I started dissecting on how to reduce the size of the VDI image. There are few tricks provided by Virtualbox itself to release zero'ed out sectors using

VBoxManage modifyvdi VDINAME compact

However trying this out on a VDI holding OpenSolaris 2008.11 RC1 candidate did not really help.

The next thing I tried was to list out all the packages that are installed using

pkg list

There are about 550 packages installed as reported by that list. I tried  removing many of the non-essential desktop things (Aha who needs Xorg, Gnome, Firefox, Thunderbird) and reduced it to less than 400 packages. However even with that the VDI images is still not much smaller than 2.5GB. I tried the trick of cloning the disk to another VDI via ZFS replace thinking it will get rid of all the freed up space obtained by removing all the packages but the resulting new VDI image was still 2.5GB.

Looking at ZFS list output I found that for my virtualbox instance with 512MB I have three main zfs file systems defined which gives me the approximate 2.5GB usage.

rpool/ROOT/opensolaris- The legacy mount which is root (/) which is about 1.3 GB

rpool/dump which is about 512MB

rpool/swap which is again about 512MB

Now the goal is to reduce the VDI size without creating complications for the end user trying out the VDI and also still have the capability of going back to the fully installed version of OpenSolaris.

Hence the quest still continues..


Wednesday Oct 01, 2008

Financial Crisis & Proprietary Expensive Software Re-evaluation

Nobody like to see their portfolios being devalued as fast as it has been in these last few months. While I do not work for a financial company, I do work for a company which does consider financial sector as one of the markets that it caters. However that's not the point of my blog entry.

 My point is at this time many financial companies are trying to figure out the true value of many securities and assets that it owns. Also at the same time they are trying to offload assets to generate cash to be viable. Well most companies are selling off assets to gain cash in returns. IT  Departments will also impacted or "told" to re-evaluate their Asset Value to figure their worth.

So what are the assets that you put value in the IT Department in times like this? I put the value as the best price that I can sell it to a buyer in current condition. (After all there are bargain hunters in this economy who are putting in billions of dollars in deals right now)

Anyway things assets that IT Departments typically have are as follows

  • Skills (in terms of People)
  • Shelves (in terms of hardware racks with server, switches,etc)
  • Software CD & Licenses

Fortunately Skills and Shelves (Hardware) have a re-sale value and depending on how much you have you can still a generate cash from it.  However I am not sure on how the IT put value on the Software CDs & Licenses that it owns. Does it have a resale value? After all you did pay millions for these  licenses in the first place? It better have some resale value.

I hope the financial institutions are already re-evaluating their strategies on investing something that has a resale value instead of Proprietary Expensive Software which cannot be resold in times like this to stay in business.




About

Jignesh Shah is Principal Software Engineer in Application Integration Engineering, Oracle Corporation. AIE enables integration of ISV products including Oracle with Unified Storage Systems. You can also follow me on my blog http://jkshah.blogspot.com

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