On Fri, 2007-06-15 at 03:22 +0530, Kalpak Shah wrote: > On Thu, 2007-06-14 at 13:50 -0700, Mingming Cao wrote: > > On Thu, 2007-06-14 at 21:26 +0530, Kalpak Shah wrote: > > > This patch adds a "noversion" mount option to disable inode version > > > updates. > > > > Can you explain a bit more why we need this mount option? Is it because > > of performance concern? > > Lustre requires the counter to be globally unique on the entire > filesystem and hence needs to turnoff per-inode version updates. So in > the interlock meeting on 5th June, Ted has suggested the this approach. > > "- Ted suggested having a flag in the superblock for i_version, with an > additional option of having a global counter for Lustre's requirements. > i_version would be on by default, but give users who do not use the > feature the option to turn it off and avoid any performance impact." > Right. Somehow my impression is that we have agreed to do this through tune2fs. I was just double checking if the mount option is for the Lustre use. Anyway, I am fine with a mount option. > Thanks, > Kalpak. > > > > > Mingming > > > > - > > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > > the body of a message to majordomo@xxxxxxxxxxxxxxx > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > - > To unsubscribe from this list: send the line "unsubscribe linux-ext4" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html - To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
