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List:       lustre-discuss
Subject:    [Lustre-discuss] How Lustre manage its data object?
From:       adilger () clusterfs ! com (Andreas Dilger)
Date:       2007-06-25 1:52:13
Message-ID: 20070625075209.GB5181 () schatzie ! adilger ! int
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On Jun 24, 2007  15:09 +0800, Boilingolf wrote:
> I have noticed that lustre is based on ext3 disk format(mkfs.ext2 -j -b 4096
> -L testfs-MDTffff  -i 4096 -I 512 -q -O dir_index -F /dev/hda7
> >/tmp/mkfs_logAjEoA6 2), but I don?t know how ost to manage its disk data
> and how mds to organize ost?s data objects. 
> 
> I just read some papers about Object Storage Protocol, but I dnot know how
> luster manage its data object on mds and oss , Could anyone help me?

Lustre stores metadata in EA on each file on MDS (struct lov_mds_md in the
"lov" EA), which points to objects on each OST by OST index.

Cheers, Andreas
--
Andreas Dilger
Principal Software Engineer
Cluster File Systems, Inc.

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