Messages in this thread | | | Subject | Re: Ext2fs and hashed table. | Date | Wed, 4 Jun 1997 04:41:23 +0200 (Funky) | From | "Matthias Urlichs" <> |
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Hi,
Stephen C. Tweedie wrote: > >[ extent mapping ] > >The main problem with this technique is that it completely falls apart >when you consider Unix semantics for files with holes --- you end up >having to reshuffle the entire extent map any time you insert new data >by writing into a hole. The current plan is simply to convert >on-the-fly from extent mapped to direct indexed block mapping if such >a write occurs. > Moving the extent mp around shouldn't be _too_ difficult...
There's also the possibility that you need to move a block from the middle of an extent someplace else (file system inconsistency, bad block discovered on media).
-- Nobody ever forgets where he buried the hatchet. -- Kin Hubbard -- Matthias Urlichs \ noris network GmbH / Xlink-POP Nürnberg Schleiermacherstraße 12 \ Linux+Internet / EMail: urlichs@noris.de 90491 Nürnberg (Germany) \ Consulting+Programming+Networking+etc'ing PGP: 1024/4F578875 1B 89 E2 1C 43 EA 80 44 15 D2 29 CF C6 C7 E0 DE Click <A HREF="http://info.noris.de/~smurf/finger">here</A>. 42
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