* Re: [gentoo-user] OT: btrfs raid 5/6
@ 2017-12-12 12:18 99% ` Wols Lists
0 siblings, 0 replies; 1+ results
From: Wols Lists @ 2017-12-12 12:18 UTC (permalink / raw
To: gentoo-user
On 12/12/17 10:15, Neil Bothwick wrote:
> That means every write has to be encrypted 4 times, whereas using
> encryption in the filesystem means it only has to be done once. I tried
> setting encrypted BTRFS this way and there was a significant performance
> hit. I'm seriously considering going back to ZoL now that encryption is
> on the way.
DISCLAIMER - I DON'T HAVE A CLUE HOW THIS ACTUALLY WORKS IN DETAIL
but there's been a fair few posts on LKML sublists about how linux is
very inefficient at using hardware encryption. Setup/teardown is
expensive, and it only encrypts in small disk-size blocks, so somebody's
been trying to make it encrypt in file-system-sized chunks. When/if they
get this working, you'll probably notice a speedup of the order of 90%
or so ...
Cheers,
Wol
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2017-11-27 22:30 [gentoo-user] OT: btrfs raid 5/6 Bill Kenworthy
2017-12-01 16:58 ` Wols Lists
2017-12-01 17:14 ` Rich Freeman
2017-12-06 23:28 ` Frank Steinmetzger
2017-12-06 23:35 ` Rich Freeman
2017-12-07 0:13 ` Frank Steinmetzger
2017-12-07 0:29 ` Rich Freeman
2017-12-07 21:37 ` Frank Steinmetzger
2017-12-07 21:49 ` Wols Lists
2017-12-11 23:20 ` Frank Steinmetzger
2017-12-12 10:15 ` Neil Bothwick
2017-12-12 12:18 99% ` Wols Lists
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