On Wed, 11 May 2016, ching lu wrote: > The read cache prevent the program to scrub the backing device directly. > > if a few bits flipped in the backing device, the cache may still > return healthy data for a while. > > Must i remove cache device before scrubbing? What do you mean by scrub? -- Eric Wheeler > > > On Wed, May 11, 2016 at 9:15 AM, Eric Wheeler <bcache@xxxxxxxxxxxxxxxxxx> wrote: > > On Fri, 29 Apr 2016, ching lu wrote: > > > >> Hello, > >> > >> i want to develop a script to perform data scrubbing periodically. > > > > I think you want to set dirty_percent to 0 and cache_mode=writethrough. > > Then wait a long time for dirty_percent to actually reach 0. > > > > -- > > Eric Wheeler > > > > > >> > >> For my use case, i think it is meaningless to scrub cached data. > >> > >> If i change the cache mode to "none", will it turn off the read cache too? > >> > >> Furthermore, will this invalidate cached data? (i do not want to "warm > >> up" the cache again after the scrubbing) > >> > >> Thanks in advance, > >> c > >> -- > >> To unsubscribe from this list: send the line "unsubscribe linux-bcache" 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-bcache" 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-bcache" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
