On Nov 28, 2012, at 10:13 PM, Michael van Elst <[email protected]> wrote:
> [email protected] (Greg Troxel) writes: > >> I wonder if it's possible (easily) to make the log only use fsbize >> boundaries, (maybe forcing it to be bigger as a side effect.) > > Writing filesystem blocks won't help. RAIDframe needs writes as large > as a stripe. The file system block size should match the raid stripe size or you have much more problems than flushing the log. > The log itself could write much larger chunks but flushing is done > in a series of writes as small as a single physical block. I think > the only way to improve that is to copy everything first into a > large buffer. Not very efficient. Needing to copy say 8 Mbytes of data and writing it in big chunks will be much faster than writing it many smaller unaligned segments. -- J. Hannken-Illjes - [email protected] - TU Braunschweig (Germany)
