http://bugzilla.novell.com/show_bug.cgi?id=590650 http://bugzilla.novell.com/show_bug.cgi?id=590650#c1 Neil Brown <nfbrown@novell.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Status|NEW |RESOLVED Resolution| |INVALID --- Comment #1 from Neil Brown <nfbrown@novell.com> 2010-04-02 21:03:21 UTC --- Yes, there it a speed penalty for using a bitmap. It is quite dependant on write load. You are probably doing lots of sequential writes to get that difference you report. Increasing the bitmap chunksize could help. Even in a degraded raid1 it is important to update the bitmap on all writes to new chunks, though we never clear bits. That way if the missing device is added back into the array, we can recovery it by just coping the chunks for which a bit is set in the bitmap. -- Configure bugmail: http://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.