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Re: [tlug] SSD caching of 10x 10GB files on slow NAS
- Date: Fri, 28 Dec 2012 15:34:34 +0900
- From: Curt Sampson <cjs@example.com>
- Subject: Re: [tlug] SSD caching of 10x 10GB files on slow NAS
- References: <CAL=gY80QoGCW9_TnDBF7ix_qyO72iBmaxoWNUKS9LZow9RhYag@mail.gmail.com> <20121228020442.GE5363@homeric.cynic.net> <CAL=gY80yQeT__3-WSzsp8RNSDUv-d_F5a6fqZLYoS+qmWhJFuA@mail.gmail.com>
- User-agent: Mutt/1.5.21 (2010-09-15)
On 2012-12-28 12:30 +0900 (Fri), Miles Colman wrote:
> Thanks Curt! Your point is well taken. The problem is slow random access to
> 10 GB files on the NAS. About 10 to 30 10 GB files will be open at any one
> time.
The number of files open is irrelevant so long as it's not in the
thousands or tens of thousands. What is your working set size? I find
it hard to believe that it's really 300 GB, since accessing each block
in such a working set just once is an hour-long operation on gigbit
Ethernet.
Keeping the application you're using a secret doesn't help much, either.
I'd guessed you were doing video editing, actually, but clearly your
application is nothing at all like that.
cjs
--
Curt Sampson <cjs@example.com> +81 90 7737 2974
To iterate is human, to recurse divine.
- L Peter Deutsch
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