On 05/31/2010 01:13 PM, Bob Friesenhahn wrote: > On Sun, 30 May 2010, Sandon Van Ness wrote: >> >> The problem is that when it does the write burst its taking away CPU >> usage from rsync which is actually what might be causing the dip during >> writes (not the I/O activity itself) but the CPU generated from the >> writes. > > You didn't say which Solaris you are using, but I think that there are > recent updates to Solaris 10 and OpenSolaris which are supposed to > solve this problem (zfs blocking access to CPU by applications). > > From Solaris 10 x86 (kernel 142901-09): > > 6586537 async zio taskqs can block out userland commands > > Bob I am using opensolaris snv_134:
r...@opensolaris: 01:32 PM :~# uname -a SunOS opensolaris 5.11 snv_134 i86pc i386 i86pc Is there a setting that to change the cpu scheduler for the ZFS process or is it supposed to just be fixed out of the box? I figure if the parity calculation process can be 'reniced' or something this problem could likely be fixed as it ended up being CPU and not disk I/O like I originally thought. _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
