RE: Solid State Drives
- From: "Freeman, Donald" <dofreeman@xxxxxxxxxxx>
- To: 'Andrew Kerber' <andrew.kerber@xxxxxxxxx>
- Date: Fri, 1 May 2009 10:50:34 -0400
So, if I bought one of these 4TB monsters I'd just split it into 2X2 TB
mirrors? Does it have to be striped or that doesn't make sense any more?
________________________________
From: Andrew Kerber [mailto:andrew.kerber@xxxxxxxxx]
Sent: Friday, May 01, 2009 10:42 AM
To: Freeman, Donald
Subject: Re: Solid State Drives
Mirroring, etc is still required. Like most modern storage, the arrays
themselves normally handle this though.
On Fri, May 1, 2009 at 9:38 AM, Freeman, Donald
<dofreeman@xxxxxxxxxxx<mailto:dofreeman@xxxxxxxxxxx>> wrote:
But what about mirroring? Are these devices so reliable that we won't have to
make redundant copies of the data to prevent loss? What's the architecture
look like?
________________________________
From: Andrew Kerber
[mailto:andrew.kerber@xxxxxxxxx<mailto:andrew.kerber@xxxxxxxxx>]
Sent: Friday, May 01, 2009 10:18 AM
To: Freeman, Donald
Cc: Oracle-L (oracle-l@xxxxxxxxxxxxx<mailto:oracle-l@xxxxxxxxxxxxx>)
Subject: Re: Solid State Drives
I wrote an article in IOUG Select journal about Solid State. I really think
Solid Statie is the coming thing. At this point, it is too expensive to put
all your storage on SS, but if you put your popular tables on it, you can see
substantial speed improvements.
If they can resolve the write issue, I could see SS really helping to reduce
pinging in RAC by making the IO to disk almost as fast as the IO to cache, thus
reducing the required cache sizes and the pinging caused by that. Redo log
would also be a good usage for SS, reducing the time to switch logs.
Currently, the developers are centered on leveling the writing, that is making
the level of writes the same across all portions of the SSD. That is showing
promise in extending the life of the SS storage. Solaris is working on a
major initiative in SSD, I dont know how that will be affected by their
purchase by Oracle
On Fri, May 1, 2009 at 9:09 AM, Freeman, Donald
<dofreeman@xxxxxxxxxxx<mailto:dofreeman@xxxxxxxxxxx>> wrote:
Has anybody given any thought to where we are going as SSD's get cheaper and
bigger? We've been going round and round at my shop with discussions about
RAID, other disk allocation issues, fights over storage. I mean we seem to
spend a lot of time on that issue. I saw that IBM is testing a 4 TB SSD. I
was wondering if you'd have to mirror that, What kind of reliability we would
be getting. No more RAID discussions? I've heard there is a finite number
of times you can write to it. What's the upgrade path here?
--
Andrew W. Kerber
'If at first you dont succeed, dont take up skydiving.'
--
Andrew W. Kerber
'If at first you dont succeed, dont take up skydiving.'
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