I would recommend trying out several stripe sizes, and making your own
measurements.
A while ago I was involved in building a data warehouse system (Oracle,
DB2) and after several file and db benchmark exercises we used 256K
stripes, as these gave the best overall performance results for both
systems.
I am not saying "1M is wrong", but I am saying "1M may not be right" :-)
regards
Mark
Bjoern Metzdorf wrote:
>
> 1. Get many drives and stripe them into a RAID0 with a stripe width of
> 1MB. I am not quite sure if this stripe width is to be controlled at
> the application level (does postgres support this?) or if e.g. the
> "chunk size" of the linux software driver is meant. Normally a chunk
> size of 4KB is recommended, so 1MB sounds fairly large.
>
>