From: UGlee <matianfu@gmail.com>
To: linux-btrfs@vger.kernel.org
Subject: mix ssd and hdd in single volume
Date: Sat, 1 Apr 2017 14:06:11 +0800 [thread overview]
Message-ID: <CAEgruXvAEBfpQaAxCi42Vq6v8w7v1dqthpn9TpE3FDDHoTWRcw@mail.gmail.com> (raw)
We are working on a small NAS server for home user. The product is
equipped with a small fast SSD (around 60-120GB) and a large HDD (2T
to 4T).
We have two choices:
1. using bcache to accelerate io operation
2. combining SSD and HDD into a single btrfs volume.
Bcache is certainly designed for our purpose. But bcache requires
complex configuration and can only start from clean disk. Also in our
test in Ubuntu 16.04, data inconsistence was observed at least once,
resulting total HDD data lost.
So we wonder if simply putting SSD and HDD into a single btrfs volume,
in whatever mode, the general read operation (mostly readdir and
getxattr) will also be significantly faster than a single HDD without
SSD.
next reply other threads:[~2017-04-01 6:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-01 6:06 UGlee [this message]
2017-04-02 0:13 ` mix ssd and hdd in single volume Duncan
2017-04-03 8:30 ` Marat Khalili
2017-04-03 8:41 ` Roman Mamedov
2017-04-07 3:12 ` Duncan
2017-04-03 12:23 ` Austin S. Hemmelgarn
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