Pythian Group

Just a quick announcements…

If you didn’t manage to attend my presentation, Oracle 11g ASM — The Evolution, during RMOUG or other conferences, you have a chance to see it online today. I’m doing it a web-cast at RAC SIG. It’s today, 4-Mar-10 at 12:00pm EST (9:00am PST).

Here are the slides from my presentation at RMOUG 2010.

I am not sure how much sense all this will make without my comments. We may do it in a webinar if there is sufficient interest. Regardless I will probably be doing it again at some point in the future.

Oracle ASM 11g Release 2 – The Evolution

Oracle Automatic Storage Management has proven to be one of the most widely adopted new features in Oracle Database 10g and it has been dramatically improved in the later 11g releases. This presentation will explain what changes are solved by ASM, how these challenges are solved, what barriers there are to ASM adoptions, and how 11g Release 2 addresses these barriers.

I shall say that the slides alone are not that helpful without my commentary but if you didn’t manage to attend it on one of the previous conferences, we will be releasing it as a webinar soon so stay tuned.

Update 9-Feb-10: Want to schedule a meeting with Pythian folks? See Pythian Events page.

I’m so much looking forward to the next conference in my schedule — RMOUG Training Days 2010. It would be only my second time I’m presenting at the RMOUG but it was enough to go there once to understand that it’s one of the top rated Oracle User Group conferences in the world. Some of the great speakers are presenting and registration fees are very low compare to other events of comparable quality. If your conference budget is low this year — that’s the conference you don’t want to miss!

Two of us from Pythian are going to speak at RMOUG Training Days 2010 that starts in just 4 week. I present the following session:

Alex Gorbachev: Oracle ASM 11g — The Evolution.
Oracle Automatic Storage Management has proven to be one of the most widely adopted new features in Oracle Database 10g and it has been dramatically improved in the later 11g releases. This presentation will explain what changes are solved by ASM, how these challenges are solved, what barriers there are to ASM adoptions, and how 11g Release 2 addresses these barriers.

My colleague, Christo Kutrovsky is presenting the following:
Read the rest of this entry . . .

Yes, it’s almost that time of the year when one of the best Oracle conferences in the world opens its doors to attendees in Birmingham — UKOUG Conference 2009: Technology & E-Business Suite. The lineup of speakers will be fantastic as usual and agenda is full of juicy bits — You will have usual troubles scheduling sessions to attend and hate to make compromises between presentations you want to see badly but that’s kind of problems you’d rather have at a good conference.

The past year was very eventful so I feel like I haven’t been at the UKOUG Conferences for years even though I did come to the UKOUG Conference 2008. This conference is something special for me — it’s the first conference I attended and presented on so it’s set the tone for the whole conferencing experience of my life and I’m very grateful for that! So far, I haven’t missed a single year since my first UKOUG conference and I hope I keep it this way for years to come.
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I recently performed a migration from Oracle 10gR2 on Solaris to the same version on Linux, immediately followed by an upgrade to 11g. Both platforms were x86-64. Migrating to Linux also included migrating to ASM, whereas we had been using ZFS to hold the datafiles on Solaris. Restoring files into ASM meant we would have to use RMAN (which we would probably choose to use anyway).

As with many databases, the client wanted minimal downtime. It was obvious to us that the most time-consuming operation would be the restore and recovery into the new instance. We were basically doing a restore and recovery from production backups and archived redo logs. It quickly dawned on me that we could start this operation well before the scheduled cutover time and downtime window, chopping at least six hours from the downtime window. The client would only need to keep the new instance in mount mode after the initial restore/recovery finished, periodically re-catalog the source instance’s FRA (which was mounted via NFS), and then re-run the recover database command in RMAN. Once the time comes to cutover, simply archivelog current the original instance and shutdown immediate. Then open the new instance with the RESETLOGS option, and voila! Migration complete!

I’ll try to recreate a simple example here. Read the rest of this entry . . .

This is the 150th edition of Log Buffer, the weekly review of database blogs. Someone accidentally left Dave Edwards’ cage unlocked, and he escaped, thus leaving me with the pleasurable duty of compiling the 150th weekly Log Buffer.

Many people other than Dave are finding release this week. Read the rest of this entry . . .

What: Sydney Oracle Meetup #6 — storage for Oracle databases

When: June 17, 2009 5:30 PM. Please RSVP Yes/No/Maybe.

Where: Our usual location at Sydney CBD. Level 3 this time!

Details:

We will start at 5:30PM with pizza and drinks and roll on from there as usual.
Note that we are meeting at the level 3 this time!

This meetup will be focused on storage technologies for Oracle database. It looks like a short presentation on Oracle Automatic Storage Management is in order – quite a few people are missing the concepts of the Oracle flagman storage storage solution and it’s useful to understand the approach whether you use it now or not.

So the presentation is – Oracle ASM 11g – the Evolution by Alex Gorbachev:
Read the rest of this entry . . .

Last year, I had very pleasant experience presenting at AUSOUG Conference 2007 in Melbourne. It was a long way from Canada but no regrets. Since I moved to Sydney more than a month ago, it’s much closer to travel and this year I will be presenting on both AUSOUG conferences — in Perth and at Gold Coast.

I arrived to Perth late Friday night and Saturday evening we had a very nice dinner with the bunch of Oracle ACE’s (and some of them ACE Directors). Local ACE’s were presented by Chris Muir, Connor McDonald and Penny Cookson. Tim Hall represented UK ACE’s while me being semi-local ACE from Sydney. Two of us were double agents — me and Connor are also members of OakTable Network. Seven is definitely a better number than 5 so my family brought number of lunch guests to 7. It’s been great to catch up with everyone before the start of the conference. Food was also very nice. Unfortunately, I had to hurry up at the end — my junior was falling asleep on the table as it was already close to midnight in Sydney timezone.
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Larry Ellison is announcing a major new feature this Wednesday at Open World. For the first time in a while, his keynote is dedicated to the “database” as opposed to the usual high level ERP/Apps/Fusion. Even the title of his keynote is catchy — “Extreme Performance”.

Oracle has been keeping the new feature a secret. Even the 11gR2 beta program had very few participants to prevent information leaking out. It’s, “Something’s coming, but I am not telling what.”

Okay, it worked on me, I’m excited about it. Let’s think what it could be. What single database feature is so major, that Larry himself will announce it during OpenWorld?

What do we know so far?

• Starting with the obvious, Larry’s keynote is “Extreme Performance”, so it’s related to performance.
• We know Kevin Closson has worked on it – he had a blog entry saying “I am working on something big” that got pulled off the web. (Here’s Google’s cache.)

Given these two point, let’s further think about it. What do we know about Kevin?

• He worked for PolyServe — a company whose main product is a cluster file system.
• He worked for Sequent on NUMA systems, which in today’s world is pretty close to cluster software with a very fast, low latency interconnect.
• He is an expert in storage systems and disk performance.
• He joined Oracle recently, possibly to work on this secret project.
• He must be really excited about it, to post anything on his blog under radio silence.

I think it’s something related to storage, something new and revolutionary about storage. But what?

We already know, from leaks on certain websites, that ASM will become a cluster filesystem which will allow storing OCR files, as well as user files, on the ASM disks.

But is this big enough? It’s definitely significant. Now you get a “free” reliable, cluster file system with Oracle. I don’t think it’s big enough though. Oracle already had OCFS and OCFS2. So it’s not something new to release a filesystem. And even if ASM becomes a true filesystem, that would not provide such a significant performance boost to warrant a keynote called “Extreme Performance”. An ASM filesystem would be a major manageability feature, not so much a performance feature.

That being ruled out, what could it be?

Recently, when setting up a new 11g database on a server with 128gb of RAM, I was setting up hugepages as usual, and thinking about how big my cache would be. It struck me that the cache will be bigger than the database for quite a while. Why do we even need the SAN/Datafiles?!

Then it hit me.

Read the rest of this entry . . .