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Increase default volblocksize from 8KB to 16KB

Description

Increase default volblocksize from 8KB to 16KB

Many things has changed since previous default was set many years ago.
Nowadays 8KB does not allow adequate compression or even decent space
efficiency on many of pools due to 4KB disk physical block rounding,
especially on RAIDZ and DRAID. It effectively limits write throughput
to only 2-3GB/s (250-350K blocks/s) due to sync thread, allocation,
vdev queue and other block rate bottlenecks. It keeps L2ARC expensive
despite many optimizations and dedup just unrealistic.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Signed-off-by: Alexander Motin <mav@FreeBSD.org>
Closes #12406

Details

Provenance
mavAuthored on Aug 17 2021, 3:59 PM
GitHub <noreply@github.com>Committed on Aug 17 2021, 3:59 PM
Parents
rGbb7ad5d326a0: Optimize arc_l2c_only lists assertions
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