On 4/8/2012 4:45 PM, Emmanuel Florac wrote: > Le Sun, 08 Apr 2012 15:33:01 -0500 vous écriviez: > >>> >>> From my experience, with modern arrays don't make much of a >>> difference. I've reached decent IOPS (i. e. about 4000 IOPS) on >>> large arrays of up to 46 drives provided there are enough threads >>> -- more threads than spindles, preferably. >> >> Are you speaking of a mixed metadata/data heavy IOPS workload similar >> to that which is the focus of this thread, or another type of >> workload? Is this 46 drive array RAID10 or RAID6? > > Pure random access, 8K IO benchmark (database simulation). RAID-6 > performs about the same in pure reading tests, but stinks terribly at > writing of course. In your RAID10 random write testing, was this with a filesystem or doing direct block IO? If the latter, I wonder if its write pattern is anything like the access pattern we'd see hitting dozens of AGs while creating 10s of thousands of files. -- Stan _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
