A while ago Kevin Closson announced a new release of the well-known SLOB kit.
SLOB is a simple but powerful toolkit that drives lots and lots of IO on a real Oracle database (so for performance testing of database platforms, it’s much better than synthetic IO tests).
A previous version was bundled with Outrun but required the entire Outrun distribution to work properly. With the new 2.3 version I created an RPM package that can be installed separate on any Enterprise Linux 6.x (64 bit) server.
A long time ago in a datacenter far, far away….
Turmoil has engulfed the IT landscape. Within the newly formed digital universe,
corporate empires are becoming more and more
dependent on their digital data and computer systems.
To avoid downtime when getting hit by an evil strike, the corporations are
starting to build disaster recovery capabilities in their operational architectures.
While the congress of the Republic endlessly debates whether
the high cost of decent recovery methods is justified,
A long time ago in a datacenter far, far away….
It is a period of digital revolution.
Rebel Dot Com companies, striking from hidden basements and secret lofts,
have won their first fights against long-standing evil corporate empires.
During the battles, rebel geeks have managed to invent secret technology to
replace corporations old ultimate weapons,
such as snail mail and public telephone networks currently powering the entire planet.
Contracted by the Empire’s sinister CIOs, the UNIX Engineer and author of this blog
It’s still a hot topic in my customer conversations: Should we use Oracle Data Guard or something else for providing disaster recovery?
I’ve written an explanation a while ago. Recently I also created a powerpoint slide comparing various features – in an attempt to be as unbiased as possible (I think I partly succeeded ;)
Many customers these days are implementing Oracle on XtremIO so they benefit from excellent, predictable performance and other benefits such as inline compression and deduplication, snapshots, ease of use etc.
A short post in follow-up to the previous one on ZFS vs ASM:
I wrote that I had to create a procedure to get full table scans on SLOB data. SLOB is designed to do random I/O (and lots of it ;-) but my test required FTS as well.
Because of the many discussions and confusion around the topic of partitioning, disk alignment and it’s brother issue, ASM disk management, hereby an explanation on how to use UDEV, and as an extra, I present a tool that manages some of this stuff for you.
The questions could be summarized as follows:
(Blog repost from Virtual Storage Zone – Thanks to @cincystorage) UPDATE: I’ll say it again because there seems to be some confusion: THIS IS A REPOST! Original content is from the Virtual Storage Zone blog (not mine). Just reposted here because it’s interesting and related to Oracle, performance and EMC storage. Enjoy…
With my blog audience all being experts in the IT industry (I presume), I think we are all too familiar with the problems of classic password security mechanisms.
Humans are just not good at remembering long meaningless strings of tokens, especially if they need to be changed every so many months and having to keep track of many of those at the same time.
A public transport company in a city called Galactic City, needs to replace its aging city buses with new ones. It asks three bus vendors what they have to offer and if they can do a live test to see if their claims about performance and efficiency holds up.
The transport company uses the city buses to move people between different locations in the city. The average trip distance is about 2 km. The vendors all prepare their buses for the test. The buses are the latest and greatest, with the most efficient and powerful engines and state of the art technology.
As an advocate on database virtualization, I often challenge customers to consider if they are using their resources in an optimal way.
And so I usually claim, often in front of a skeptical audience, that physically deployed servers hardly ever reach an average utilization of more than 20 per cent (thereby wasting over 80% of the expensive database licenses, maintenance and options).
Last Tuesday I had the privilege to present at Oracle Openworld 2013 together with Sam Marraccini (the guy with the big smile here in the pic) from EMC’s Flash products division. Sam introduced the various EMC Flash offerings we have, and I discussed some experiences and best practices from the field.
By now, we all know Oracle is fully supported on VMware. Anyone telling you it’s not supported is either lying to you, or doesn’t know what he is talking about (I keep wondering what’s worse).
VMware support includes Oracle RAC (if it’s version 126.96.36.199.0 or above). However, Oracle may request to reproduce problems on physically deployed systems in case they suspect the problem is related to the hypervisor. The support note says:
We’re organizing a briefing day in Cork, Ireland on june 4-5-6 for EMEA EMC customers, focusing on Oracle (that said, if you are not currently an EMC customer but like to hear our story, you’re more than welcome).
My all-time high post with the most pageviews is the one on Linux disk alignment: How to set disk alignment in Linux. In that post I showed an easy method on how to set and check disk alignment under linux.
Disk Fragmentation – O&O technologies.Hope they don’t mind the free advertising
Yet another customer was asking me for advice on implementing the ZFS file system on EMC storage systems. Recently I did some hands-on testing with ZFS as Oracle database file store so that I could get an opinion on the matter.
As more and more customers are moving their mission-critical Oracle database workloads to virtualized infrastructure, I often get asked how to deal with Oracle’s requirement to reproduce issues on a physical environment (especially if they use VMware as virtualization platform – as mentioned in Oracle Support Note # 249212.1).
I have been enjoying a short holiday in which I decided to totally disconnect from work for a while and re-charge my battery. So while many bloggers and authors in our industry were making predictions for 2013, I was doing some other stuff and blogging was not part of that ;-)
A while ago somebody forwarded me a research paper from an “independent” research firm in which the cost of VMware and Oracle VM were compared. Interesting!
Now you might wonder why, as someone working for EMC, I would care about such comparisons. Why would I be bothered by VMware in the first place?
In previous posts I have focused on the technical side of running business applications (except my last post about the Joint Escalation Center). So let’s teleport to another level and have a look at business drivers.
What happens if you are an IT architect for an organization, and you ask your business people (your internal customers) how much data loss they can tolerate in case of a disaster? I bet the answer is always the same:
EMC and Oracle have supported each others products since 1995 and both spent millions of dollars in making them work together. EMC actually became famous in the late nineties because of our “Guilty until proven innocent” support mentality.
One of my missions is to help customers saving money (Dirty Cache Cash). So considering the average enterprise application environment, I frequently ask them where they spend most of their IT budget on. Is it servers? Networks? Middleware? Applications?