Messages in this thread | | | From | Andreas Dilger <> | Date | Fri, 17 May 2002 12:36:13 -0600 | Subject | Re: [PATCH] remove 2TB block device limit |
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On May 17, 2002 08:32 -0500, Jesse Pollard wrote: > Note - most these really large filesystems allow the inode tables and > bitmaps to be stored on disks with a relatively small blocksize (raid 5), > and the data on different drives (striped) with a large block size (I believe > ours is 64K to 128K sized data blocks, inode/bitmaps are 16K-32K.) > > The division allows for high integrity of the meta data (which is also > backed up daily (incremental) - but without the corresponding datablocks), > along with maximum capacity for data. 1/5 of 200TB is about 40TB if raid5 > were used with everything.
Interestingly, this can also be done for Lustre, the OSS cluster filesystem I am currently working on (http://www.clusterfs.com). All of the filesystem metadata is actually stored on a separate server, so its disk can be configured totally separately from the file data.
Cheers, Andreas -- Andreas Dilger http://www-mddsp.enel.ucalgary.ca/People/adilger/ http://sourceforge.net/projects/ext2resize/
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