Messages in this thread | | | Date | Wed, 05 Jul 2006 08:06:05 -0400 | From | Bill Davidsen <> | Subject | Re: ext4 features (checksums) |
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Avi Kivity wrote: > Neil Brown wrote: >> >> To my mind, the only thing you should put between the filesystem and >> the raw devices is RAID (real-raid - not raid0 or linear). >> > I believe that implementing RAID in the filesystem has many benefits too: > - multiple RAID levels: store metadata in triple-mirror RAID 1, random > write intensive data in RAID 1, bulk data in RAID 5/6 > - improved write throughput - since stripes can be variable size, any > large enough write fills a whole stripe > I rather like the idea of allowing metadata to be on another device in general, or at least the inodes. That way a very small chunk size can be used for the inodes, to spread head motion, while a larger chunk size is appropriate for data in some cases.
Larger max block sizes would be useful as well. Feel free to discuss the actual value of "larger."
-- Bill Davidsen <davidsen@tmr.com> Obscure bug of 2004: BASH BUFFER OVERFLOW - if bash is being run by a normal user and is setuid root, with the "vi" line edit mode selected, and the character set is "big5," an off-by-one errors occurs during wildcard (glob) expansion.
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