From 6d974228ef05366c546bb04198dafcb38785c16d Mon Sep 17 00:00:00 2001 From: George Wilson Date: Tue, 26 Jul 2011 12:08:52 -0700 Subject: Illumos #1051: zfs should handle imbalanced luns Today zfs tries to allocate blocks evenly across all devices. This means when devices are imbalanced zfs will use lots of CPU searching for space on devices which tend to be pretty full. It should instead fail quickly on the full LUNs and move onto devices which have more availability. Reviewed by: Eric Schrock Reviewed by: Matt Ahrens Reviewed by: Adam Leventhal Reviewed by: Albert Lee Reviewed by: Gordon Ross Approved by: Garrett D'Amore References to Illumos issue and patch: - https://www.illumos.org/issues/510 - https://github.com/illumos/illumos-gate/commit/5ead3ed965 Signed-off-by: Brian Behlendorf Issue #340 --- include/sys/metaslab.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/sys/metaslab.h') diff --git a/include/sys/metaslab.h b/include/sys/metaslab.h index 583d6303b..2cf4d2b48 100644 --- a/include/sys/metaslab.h +++ b/include/sys/metaslab.h @@ -20,6 +20,7 @@ */ /* * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2011 by Delphix. All rights reserved. */ #ifndef _SYS_METASLAB_H @@ -47,6 +48,8 @@ extern void metaslab_sync_reassess(metaslab_group_t *mg); #define METASLAB_HINTBP_FAVOR 0x0 #define METASLAB_HINTBP_AVOID 0x1 #define METASLAB_GANG_HEADER 0x2 +#define METASLAB_GANG_CHILD 0x4 +#define METASLAB_GANG_AVOID 0x8 extern int metaslab_alloc(spa_t *spa, metaslab_class_t *mc, uint64_t psize, blkptr_t *bp, int ncopies, uint64_t txg, blkptr_t *hintbp, int flags); -- cgit v1.2.3