On May 30, 2006, at 10:36 AM, [EMAIL PROTECTED] wrote:
That does not answer th equestion I asked; since ZFS is a copy-on-
write
filesystem, there's no fixed inode location and streaming writes
should
always be possible.
The überblock still must be updated, however. This may not be an issue
if its updates don't have to be done on the data devices, but I believe
the current design has a copy (several actually) on each device for
redundancy.
I think ZFS should do fine in streaming mode also, though there are
currently some shortcomings, such as the mentioned 128K I/O size.
It may eventually. The lack of direct I/O may also be an issue, since
some of our systems don't have enough main memory bandwidth to support
data being extensively touched by the CPU between capture (DMA in) and
writing (DMA out).
-- Anton
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