From: Massimo Maggi <massimo@mmmm.it>
To: linux-btrfs@vger.kernel.org
Subject: New idea about RAID and SSD
Date: Tue, 01 Sep 2009 14:44:54 +0200 [thread overview]
Message-ID: <4A9D1746.1020407@mmmm.it> (raw)
Hi,
SSDs have low latency but a high price per GB,
Traditional hard disks have high latency, but high sequential read/write
speed and low price per GB.
Is possibile to use a SSD for metadata, which requires many seeks and is
relatively small, in a special "RAID mode" with a traditional hard disk
for the extents of the real data?
A cheap but performant SSD (maybe 32 GB) + a big and fast HD (maybe 1.5
TB, or two in RAID0 - 3TB ), wouldn't create an array much cheaper than
a ssd-only array of the same size, and much faster (in
not-only-sequential workload) than one or two traditional HDs in RAID0?
Would it work?
Thank you for your precious time!
Massimo Maggi
massimo@mmmm.it
next reply other threads:[~2009-09-01 12:44 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-01 12:44 Massimo Maggi [this message]
2009-09-01 13:05 ` New idea about RAID and SSD Sander
2009-09-01 13:10 ` jim owens
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