> On Tue, Feb 20, 2007 at 01:30:25PM -0800, Junfeng Yang wrote: > > On 2/20/07, Valerie Henson <val_henson@xxxxxxxxxxxxxxx> wrote: > > > > > >Google. (GoogleFS runs on top of ext2.) > > > > It's surprising to know that... I guess they reply on GoogleFS's own > > replication and checksumming for consistency. > > Yep, they just want a local file system with ultrafast on-line > performance. They don't care about recovery time particularly because > of the GoogleFS replication (although I heard rumors they have some > fast fsck scheme, maybe resembling the dirty bit stuff I did last > year). Actually, according to the GFS paper (which may be out of date), for the chunkservers that is true, but for their "master" they really want fast recovery as a way to reduce mean-time-to-repair (and thus increase availability). Though, given that they have shadow masters perhaps everyone is happy as long as master recovery usually fast. Dawson - To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
