DRBD BenchmarkingDRBD Benchmarking
I’ve got some performance problems with a mail server that’s using DRBD so I’ve done some benchmark tests to try and improve things. I used Postal for testing delivery to[...]
Category: Benchmark
Released Bonnie++ 1.96Released Bonnie++ 1.96
I have released version 1.96 of Bonnie++ in the experimental branch [1]. The main changes are: Made it compile on Solaris again (version 1.95 broke that) Now supports more files[...]
Vibration and Strange SATA PerformanceVibration and Strange SATA Performance
Almost two years ago I blogged about a strange performance problem with SATA disks [1]. The problem was that certain regions of a disk gave poor linear read performance on[...]
New version of Bonnie++ and Violin MemoryNew version of Bonnie++ and Violin Memory
I have just released version 1.03e of my Bonnie++ benchmark [1]. The only change is support for direct IO in Bonnie++ (via the -D command-line parameter). The patch for this[...]
New HP ServerNew HP Server
I’ve just started work on a new HP server running RHEL5 AS (needs to be AS to support more than 4 DomU’s). While I still have the Xen issues that[...]
New ZCAV DevelopmentNew ZCAV Development
I have just been running some ZCAV tests on some new supposedly 1TB disks (10^40 bytes is about 931*2^30 so is about 931G according to almost everyone in the computer[...]
Xen and SwapXen and Swap
The way Xen works is that the RAM used by a virtual machine is not swappable, so the only swapping that happens is to the swap device used by the[...]
New Bonnie++ ReleasesNew Bonnie++ Releases
Today I released new versions of my Bonnie++ [1] benchmark. The main new feature (in both the stable 1.03b version and the experimental 1.93d version) is the ability of zcav[...]
RAID and Bus BandwidthRAID and Bus Bandwidth
As correctly pointed out by cmot [1] my previous post about software RAID [2] made no mention of bus bandwidth. I have measured the bus bottlenecks of a couple of[...]
Bonnie++ and Postal shirtsBonnie++ and Postal shirts
Dear lazyweb, I want to design T-Shirts for my Bonnie++ and Postal projects. But representing those projects in a picture seems more difficult than SE Linux (see one of my[...]