From: Kai Krakow <hurikhan77@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: Re: btrfstune settings
Date: Sun, 28 Aug 2016 19:41:46 +0200 [thread overview]
Message-ID: <20160828194146.7349d29a@jupiter.sol.kaishome.de> (raw)
In-Reply-To: df5ff0e5-f07b-72ca-f49f-e9cf2e2c6e39@googlemail.com
Am Sun, 28 Aug 2016 18:18:52 +0200
schrieb Oliver Freyermuth <o.freyermuth@googlemail.com>:
> That would certainly be the best option, however,
> I have two issues with that:
> - Any replay of a backup will do a lot of writes on the SSD,
> reducing lifetime.
I'm using bcache in front of my harddisks (writeback mode) to get
almost-SSD performance. That way, when I restore, I can simply switch
to writearound mode, restore, then switch back to writeback mode.
But in the long term, writeback mode will be extremely heavy on SSD
wearing when the bcache is small because it will have to evict a lot of
data from the cache. I'm using 500GB bcache for 3x 1TB harddisk. 500GB
is more than my usual working set so bcache almost never has to evict
data from the cache.
--
Regards,
Kai
Replies to list-only preferred.
next prev parent reply other threads:[~2016-08-28 18:00 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-28 3:42 btrfstune settings Oliver Freyermuth
2016-08-28 8:27 ` Duncan
2016-08-28 13:30 ` Kai Krakow
2016-08-28 16:18 ` Oliver Freyermuth
2016-08-28 17:35 ` Kai Krakow
2016-08-28 18:10 ` Oliver Freyermuth
2016-08-28 18:34 ` Lionel Bouton
2016-08-28 19:06 ` Kai Krakow
2016-08-28 17:41 ` Kai Krakow [this message]
2016-09-01 17:14 ` David Sterba
2016-09-01 23:54 ` Oliver Freyermuth
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