The value of 1000 is good for bio based multipath. Seen 50% increase in I/O ops by setting it to 1 in request based multipath configuration. This patch would give poor performance for people still using the bio based multipath! Is it possible to detect request based multipath and change only for those configurations? diff -r e504a50b0db5 -r 91d6dae7d882 libmultipath/defaults.h --- a/libmultipath/defaults.h Wed Jan 19 13:16:40 2011 -0800 +++ b/libmultipath/defaults.h Wed Jan 19 13:29:52 2011 -0800 @@ -5,7 +5,7 @@ #define DEFAULT_ALIAS_PREFIX "mpath" #define DEFAULT_FEATURES "0" #define DEFAULT_HWHANDLER "0" -#define DEFAULT_MINIO 1000 +#define DEFAULT_MINIO 1 #define DEFAULT_PGPOLICY FAILOVER #define DEFAULT_FAILBACK -FAILBACK_MANUAL #define DEFAULT_RR_WEIGHT RR_WEIGHT_NONE -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
