The Problem In the last week, I had to set up an Oracle RAC (and thus, the Clusterware) version 12.2.0.1 on SuSE Linux Enterprise Server 12 SP2 (SLES12 Sp2). The gridSetup.sh failed latest in root.sh of the first node with a kinda non-intuitive error: CRS-5804: Communication error with agent process CRS-4000: Command Start failed, or […]
Category: Hardware
Hardware of any kind
Visited Germany’s first Spatial Database, Size 26 kiloStones
Last week, I had the chance to visit Bavaria’s (and so also Germany’s) oldest Spatial Database. It’s buried deep below Munich, and contains all the geo information about Bavaria in scale 1:5000 and some in 1:2500. It was introduced in 1808 and was in use until 1950. That’s also the current state of the data. […]
Performance is rarely an accident (Deutsch)
Some time ago, I saw a great presentation of Cary Millsap: „Thinking clearly about performance”. It was obviously relevant for our internal developers, so he unhesistantly granted me permission to reproduce some of his ideas for us. Cary, thank you very much! Here you can see, what I made out of the topic, mostly for […]
Speaking at COLLABORATE 14: “YOUR machine and MY database – a performing relationship!?”
I’m excited to announce that IOUG accepted my talk “YOUR machine and MY database – a performing relationship!?” for COLLABORATE 14 in Las Vegas. I’d love to see you there – for tech talk, gossip and meeting old and new friends! Abstract: Databases affect machines, machines affect databases. Optimizing one is pointless without knowing the […]
Oracle 10g Data warehouse ORION benchmark, size 20TB, 1200MB per second
During the last days, I have had the opportunity to test and benchmark a data warehousing hardware, that’s really fast for its money. It’s not suitable for real/available production, since it depends on disk striping over a bunch of components, but I considered it as a good way to push the limits a bit. Result: […]
World’s fastest SATA drive: WD VelociRaptor WD3000GLFS
Hi, imagine a 2,5″ SATAII disk in a 3,5″ heat sink. It’s 300 GB in size, 120MB/s buffer-to-disk rate, 16 MB Cache, 10.000 RPM, consuming 6 Watts under load. Look here. I think this baby should take up to 150 IO/s, in combination with RAID 0+1 and a decent RAID controller or/and (Oracle’s) ASM this […]