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Hello XFS team, I have run into trouble with XFS, but excuse me if this question has been asked a dozens times. I'm am filling a very big file on a XFS filesystem on Linux that stands on a software RAID 0. Performance are very good until I get 2 "holes" during which my write stalls for a few seconds. Mkfs parameters: mkxfs.xfs -b size 4096 -s size 4096 -d agcount=2 -i size=2048 The RAID0 is done a 2 SATA disks of 500 GB each. My test is just running "dd" with 8M blocks: dd if=/dev/zero of=/DATA/big (/DATA is the XFS file system) The system is basically a RHEL5 with a 2.6.18 kernel and XFS packages from CentOS. The problem happens 2 times: one time around 210 GB and the second time around 688 GB (hole in performance and response time is bigger the second time -- around 20 seconds) Do you have any clue ? Do my mkfs parameters make sense ? The goal here is really to have something that is able to store big files at a constant throughput -- the test is done on purpose. --
Mathieu Avila IT & Integration Engineer mathieu.avila@xxxxxxxxxxxxxxxx OpenCube Technologies http://www.opencubetech.com Parc Technologique du Canal, 9 avenue de l'Europe 31520 Ramonville St Agne - FRANCE Tel. : +33 (0) 561 285 606 - Fax : +33 (0) 561 285 635 |
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