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Improving ext4: bigalloc, inline data, and metadata checksums

Improving ext4: bigalloc, inline data, and metadata checksums

Posted Dec 1, 2011 20:25 UTC (Thu) by sniper (guest, #13219)
In reply to: Improving ext4: bigalloc, inline data, and metadata checksums by tytso
Parent article: Improving ext4: bigalloc, inline data, and metadata checksums

Small correction.

ocfs2 is not a fork of ext3 and neither is ocfs2-tools a fork of e2fsprogs. But both have benefited a _lot_ from ext3. In some instances, we copied code (non-indexed dir layout). In some instances, we used a different approach because of collective experience (indexed dir). grep ext3 fs/ocfs2/* for more.

The toolset has a lot more similarities to e2fsprogs. It was modeled after it because it is well designed and to also allow admins to quickly learn it. The tools even use the same parameter names where possible. grep -r e2fsprogs * for more.

BTW, ocfs2 has had bigalloc (aka clusters) since day 1, inline-data since 2.6.24 and metadata checksums since 2.6.29. Yes, it does not have delayed allocations.


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Improving ext4: bigalloc, inline data, and metadata checksums

Posted Apr 13, 2012 19:30 UTC (Fri) by fragmede (guest, #50925) [Link]

OCFS2 does have snapshots though, which is why I use it. :)

LVM snapshots are a joke if you have *lots* of snapshots, though I haven't looked at btrfs snapshots since it became production ready.


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