Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
On 06/26/2011 05:30 PM, Andreas Hofmeister wrote: > With 'dd' on a system with similar performance (8x15k SAS disks, LSI, > 10GBE), I get 1GByte/s into the local block device but only 600MByte/s > into the DRBD device. Using another benchmark ("fio" with async-I/O and > larer values for I/O-depth), I can get up to about 1.2GByte/s in both > cases. Yes, dd is not a typical workload. It can be worthwile to use benchmarks with more "realistic" workloads, but frankly, I disbelieve that many people will find tools that accurately model their respective target workloads in that respect. I like the fact that dd will report a specific technical boundary to me. If my real life workload load leads to even higher throughput, that is appreciated. An interesting question for me is: Is tuning for dd-like workloads potentially harmful to random access throughput? I certainly don't hope so. Cheers, Felix