3 min read
0
Cache behavior – How long will it take to fill my cache?
When benchmarking filesystems or storage, we need to understand the caching effects. Most often this involves filling the cache and…
Category: Storage Performance
Storage Performance and benchmarking
2 min read
0
Things to know when using vdbench.
Recently I found that vdbench was not giving me the amount of outstanding IO that I had intended to configure…
2 min read
0
Impact of Paravirtual SCSI driver VS LSI Emulation with Data.
TL;DR Comparison of Paravirtual SCSI Vs Emulated SCSI in with measurements. PVSCSI gives measurably better response times at high load. …
3 min read
0
Multiple devices/jobs in fio
If your underlying filesystem/devices have different response times (e.g. some devices are cached – or are on SSD) and others…
2 min read
0
Here be Zeroes
Many storage devices/filesystems treat blocks containing nothing but zeros in a special way, often short-circuiting reads from the back-end. This…