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> 请问这里的extent是指数据库的seg,extent,block的extent么?
No. It's unfortunate that the ASM technology uses the word "extent", which is also used by RDBMS where it refers to a contiguous blocks of a datafile allocated to a segment.
> 还是用ASM就不能指定uniform size了
They're completely separated. You can always do what you can in creating a tablespace (or table or index) regardless you use ASM or not.
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