Have you tried umounting and mounting before the second test to eliminate any caching? Which kernel you use?
2010/8/18 Miao Xie <mi...@cn.fujitsu.com>: > Hi, > > We did some performance test and found the create/delete files performance > of btrfs is very poor. > > The test is that we create 50000 files and measure the file-create time > first, and then delete these 50000 files and measure the file-delete time. > (The attached file is the reproduce program) > > The result is following: > (Unit: second) > Create file performance > BtrFS Ext4 > Total times: 2.462625 1.449550 > Average: 0.000049 0.000029 > > Delete file performance > BtrFS Ext4 > Total times: 3.312796 0.997946 > Average: 0.000066 0.000020 > > The results were measured on a x86_64 server with 4 cores and 2 SAS disks. > By debuging, we found the btrfs spent a lot of time on searching and > inserting/removing items in the ctree. > > Is anyone looking at this issue? > > Regards > Miao Xie > -- Caution: breathing may be hazardous to your health. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
