Ardent Performance Computing
Jeremy
RAC Investigation on Low-Memory Linux
Back in the Oracle 9i days, I was one of those people who got on eBay to buy firewire PCI cards and disks that could do non-exclusive login. Remember that? The first time a little test cluster could be cheap enough for the home enthusiast? I still have the parts in my closet. Of course, … Continue reading
DBCA Missing – Oracle 11.2 ASM/Grid
Oracle provides three ways to manage ASM: (1) through SQL, (2) through the web-based database console or grid control, and (3) through the server-based java GUI tool DBCA. These are your choices for adding storage, replacing a disk, growing a volume, etc. But if you’re an experienced DBA who recently started playing with 11gR2 ASM, … Continue reading
Michigan OakTable – Illinois Visitors?
Quite a few people have already plugged this event (Charles Hooper, Jonathan Lewis, Tanel Poder, Doug Burns, Christian Antognini, Randolf Geist, etc) – but I want to chime in anyway. It’s so closeby and the price goes up in two days! The Thursday and Friday before OpenWorld (September 16-17), some kind folks in Michigan are … Continue reading
ASM Mirroring – No Hot Spare Disk
Some time ago, we installed Oracle on a Sun box with 48 local 1TB disks (spread across six controllers). I explained to the storage and system teams that we would use ASM as the volume manager – and as such, it would take care of mirroring. One storage admin asked me which disk was the … Continue reading
Five Reasons to do RAC Attack at Collaborate
Last week Dan broke the news that we’re bringing RAC Attack back to Collaborate! We’ve run this workshop several times now: it’s gotten better every time and we’ve always received overwhelmingly positive feedback. This is going to be a great workshop in Orlando that you don’t want to miss! A Short History We first ran … Continue reading
ASM Negative Free Space
In the last post I showed mathematically how ASM calculates the free usable space that it displays. However one of the first questions I received after presenting that internally was from someone concerned about all of the unusable space being saved just in case we lose a disk. (In my worked example it was 1/6 … Continue reading
ASM Space Calculations and Hot Spares
This is quick and dirty. I hope to get a more polished write-up of what it means and how it works, but since I’m so busy right now I don’t know if I’ll get to it soon. In the meantime someone just might find this useful or informative so I’m just going to put it … Continue reading
Future of OCFS2
At the company where I’m working right now, I’m part of an architecture effort to come up with our standard design for RAC on Linux across the firm. There will be dozens or possibly hundreds of deployments globally using the design we settle on. We’re internally debating whether or not we should include OCFS2 in … Continue reading
Oracle ASM Stripe Size
Right now I’m working on some internal documentation and referencing Oracle 11g’s Storage Administrators Guide (ASM manual). And I think there’s a bit of a contradiction here about the stripe size. ASM uses a variable “data extent” size when allocating space for files (like any sane filesystem) – the first 20000 data extents are equal … Continue reading
Robust Software Version Numbering
This article isn’t directly database-related, but I think it’s a great software engineering topic so it seemed worth writing about. Right now I’m involved in a project that involves releasing software packages of a few different flavors. Some of them are other people’s software that we’re re-packaging (like oracle database binaries) and some are code … Continue reading
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This is my personal website. The views expressed here are mine alone and may not reflect the views of my employer.
contact: schneider @ ardentperf.com
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