Bruce Sterling Woodcock wrote:
It is probably also important to note the memory and NVRAM configurations of your filers when discussing performance issues... these have a very important impact, especially for news systems!
Read cache certainly does -- halving ours from 256MB to 128MB for a brief period had a noticeable impact on the filer load. However, our filers only have 2MB of NVRAM and according to sysstat, writes are occurring at leisurely 10-second intervals.