Yes, that is the way I understand it. If you do purchase those, we would really be interested in your results. On Fri, May 1, 2009 at 10:04 AM, Freeman, Donald <dofreeman@xxxxxxxxxxx>wrote: > OK, I think I understand now. Each of these new drives is equivalent to > a spindle and you mirror and stripe exactly the same way. > > ------------------------------ > *From:* Matthew Zito [mailto:mzito@xxxxxxxxxxx] > *Sent:* Friday, May 01, 2009 10:56 AM > *To:* Freeman, Donald; Andrew Kerber > *Cc:* oracle-l@xxxxxxxxxxxxx > > *Subject:* RE: Solid State Drives > > No, you’d still buy 2 x drives for mirroring, and 3+ x for RAID5. > Remember that the physical interface from the drive to the array is still a > SPOF, so you can’t depend on the internal isolation within a drive. > > > > Thanks, > > Matt > > > ------------------------------ > > *From:* oracle-l-bounce@xxxxxxxxxxxxx [mailto: > oracle-l-bounce@xxxxxxxxxxxxx] *On Behalf Of *Freeman, Donald > *Sent:* Friday, May 01, 2009 10:51 AM > *To:* 'Andrew Kerber' > *Cc:* Oracle-L (oracle-l@xxxxxxxxxxxxx) > *Subject:* RE: Solid State Drives > > > > 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> > 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] > *Sent:* Friday, May 01, 2009 10:18 AM > *To:* Freeman, Donald > *Cc:* Oracle-L (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> > 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.' > -- Andrew W. Kerber 'If at first you dont succeed, dont take up skydiving.'