[fuse-devel] BDI Max ratio in case of FUSE

[Bharath K. R. V. <bva...@cs...>]

Hello,

I'm trying to look at the behaviour of write back cache option in case of
FUSE writes, but I got know (from earlier fuse-devel mail) that the *dirty
threshold limit *for FUSE BDI device is set very low 1% (
*bdi_set_max_ratio(&fc->bdi,
1)*). Can any one please let me know *why it was decided so* ? , because
looking at the code (using git blame) shows this piece of code was there
from very initial days and it was never touched after that.

Is it because there might be a high chance (almost double) of data loss in
case of unexpected failures as there is again an underlying File System
incase of Stackable Fuse File System which again caches the data ? Did any
one try increasing the limit and did see any better/worse performance ?

Any help is highly appreciated.

Thanks,
Bharath.