Re: Reiser4 status: benchmarked vs. V3 (and ext3)

Hans Reiser
2003-07-28T13:18:07Z

Daniel Egger wrote:

>Am Mon, 2003-07-28 um 14.44 schrieb Hans Reiser:
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>>>This looks fine for normal harddrives put on flash you'd probably like
>>>to write the data evenly over the free space in some already formatted
>>>section still leaving the oportunity to format some other sectors to not
>>>run out of space.
>>>
>>>
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>>I was not able to parse the sentence above.;-)
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>s/put/but/
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>As already mentioned the flash chips have to be erased before they can
>be written. The erasesize is much larger than the typical block size
>which means that although a block doesn't contain valid data it still
>contains something which means that it cannot be written until it was
>erased. That's why JFFS2 is using garbage collection to reclaim unused
>but (at the moment) unusable space.
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>>No, you could be more clever than that.
>>
>>
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>Sure. :)
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If you feel ambitious, try increasing the reiser4 node size to equal the
erase size. This requires changes to VM though.

--
Hans