Hi, 2014-01-24 (금), 23:07 +0100, Clemens Eisserer: > Hi Jaegeuk, > > Thanks a lot for your reply. > > > The f2fs_gc can be controlled by user through a sysfs entry. > > So, could you look at the amount of written data by varying the gc > > interval? > > > > cat /sys/fs/f2fs/$dev/gc_min_sleep_time > > 30000 > > cat /sys/fs/f2fs/$dev/gc_max_sleep_time > > 60000 > > > > These values are represented in milliseconds. > > If you don't want to write data as much as possibe and don't need a high > > performance as the partition becomes full, you can just grow the > > interval times. > > The other way is that you can just add a mount option, "-o > > background_gc=off", which turns off the f2fs_gc. > > I'll try turning off the background-gc, as I can't find the > sysfs-knobs in my system. > > What I still wonder is, how the cleaner can write twice the data it > reads (as in the above example).
If a data is selected to be moved, its node block, an index block, should be read too. So, I think it can be double. I think the mount option would be "background_gc_off" in v3.10. Thanks, > > Regards, Clemens > > ------------------------------------------------------------------------------ > CenturyLink Cloud: The Leader in Enterprise Cloud Services. > Learn Why More Businesses Are Choosing CenturyLink Cloud For > Critical Workloads, Development Environments & Everything In Between. > Get a Quote or Start a Free Trial Today. > http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk > _______________________________________________ > Linux-f2fs-devel mailing list > Linux-f2fs-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel -- Jaegeuk Kim Samsung ------------------------------------------------------------------------------ CenturyLink Cloud: The Leader in Enterprise Cloud Services. Learn Why More Businesses Are Choosing CenturyLink Cloud For Critical Workloads, Development Environments & Everything In Between. Get a Quote or Start a Free Trial Today. http://pubads.g.doubleclick.net/gampad/clk?id=119420431&iu=/4140/ostg.clktrk _______________________________________________ Linux-f2fs-devel mailing list Linux-f2fs-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
