On Fri, 9 Dec 2005, Neil Brown wrote: > On Friday December 9, kylewong@xxxxxxxxxx wrote: > > Hi, > > > > I found that there's a new sysfs "stripe_cache_size" variable. I want to > > know how does it affect RAID5 read / write performance (if any) ? > > Please cc to me if possible, thanks. > > Would you like to try it out and see? > Any value from about 10 to a few thousand should be perfectly safe, > though very large values may cause the system to run short of memory. > > The memory used is approximately > stripe_cache_size * 4K * number-of-drives What??? I hope that's a typo... 1 - there's no use of the sysfs variable? 2 - that's going to be huge, 128k * 4k * 10 = 5.1GB !!! > > NeilBrown -- bill davidsen <davidsen@xxxxxxx> CTO TMR Associates, Inc Doing interesting things with little computers since 1979 - To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
