AW: AW: AW: AW: AW: ZFS: Corrupted pool metadata after adding
vdev to a pool - no opportunity to rescue data from healthy vdevs? Remove
a vdev? Rewrite metadata?
Volodymyr Kostyrko
c.kworr at gmail.com
Tue Sep 18 12:40:05 UTC 2012
18.09.2012 14:23, Gary Palmer wrote:
>> From my point of view all hype about moving to 4k sectors is highly
>> irrelevant to ZFS and current products on the market.
>>
>> 1. ZFS tends to use big recordsize for storing any data. This means most
>> files on your drives are already stored in 128k sectors. Storing small
>> tails in 512b or 4k sectors shouldn't give big difference.
>
> Performance testing has shown that running "advanced format" (aka 4kilobyte
> sector disks) with 512 byte alignment with ZFS seriously degrades performance
> compared to running with 4 kilobyte alignment.
Please understand me correctly, this is only my point of view on the
problem as I never saw any tests that show difference between correct
alignment of _partitions_ and alignment on _records_ on ZFS. This area
is not thoroughly covered with test data.
--
Sphinx of black quartz judge my vow.
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