On Mon, Jan 4, 2010 at 4:39 PM, Thomas Burgess <wonsl...@gmail.com> wrote: > > I'm PRETTY sure the kingston drives i ordered are as good/better > > i just didnt' know that they weren't "good enough"
I disagree that those drives are "good enough". That particular drive uses the dreaded JMicron controller - which has a really bad reputation. And a poor reputation that it *earned* and deserves. Even though these drives use a newer revision of the original JMicron part (that basically sucks) - this one is *not* much better. Have a look at this recent article from tomshardware.com and you'll see the performance characteristics of the 128Gb version of your 64Gb drive. And, BTW, usually (nearly always) the larger version of a drive performs better than the smaller (versions) of the same drive family. Here's the link: http://www.tomshardware.com/reviews/windows-ssd-performance,2518.html As regards Intels SLC products, the newer version of the x25E product will arrive RSN (Real Soon Now) - although no-one knows the exact release date. The new drives will be 50, 100 and 200Gb in size and are based on the newer 34nm flash parts (as is the G2 version of the x25m). So I would not recommend purchasing the X25E series until the new models are released. Someone else suggested the OCZ vertex - again watch out for the lower performance of the smaller members of this family. The 120Gb version of that drive has had many positive reviews - but is outside your budget. With a hard $300 budget I'd go with two of the Kingston 40Gb drives I posted about on this list (email if you can't find the post). This product is a stripped down Intel x25m - half the flash and half the control channels. Writes are 1/2 of an x25m - but reads are pretty good. Excellent for a boot device and available for just under $100 each. If you don't mind going $100 over budget [1], then I'd add a *single* Intel x25m 80Gb drive and partition it to experiment with slog and zil storage. Since the *known* failure rates on SSDs are very low, I would not be worried with not having mirrored larc. I'd use the x25m to run a set of experiments - as others have suggested. Since its so *fast* to experiment with ZFS - you'll reach solid conclusions after a couple of hours of experiments and then decide what you want to do as regards using SSDs. You can always re-purpose the x25m for another application. And if you decide it adds value to your ZFS box, down the road you can add a 2nd one and mirror it. Thomas - I think you're over analyzing your ZFS config at this point. Like I said - build it and experiment. [1] and you could always drop one or two data drives. There's a big advantage to only buying the storage capacity you need *right now* - since, by deferring the purchase of additional space you need in the future, you'll likely be able to purchase higher density, higher performance and lower cost-per-gigabyte drives when you do *need* the extra storage. PS: For data that you want to mostly archive, consider using Amazon Web Services (AWS) S3 service. Right now there is no charge to push data into the cloud and its $0.15/gigabyte to keep it there. Do a quick (back of the napkin) calculation on what storage you can get for $30/month and factor in bandwidth costs (to pull the data when/if you need it). My "napkin" calculations tell me that I cannot compete with AWS S3 for up to 100Gb of storage available 7x24. Even the electric utility bill would be more than AWS charges - especially when you consider UPS and air conditioning. And thats not including any hardware (capital equipment) costs! see: http://aws.amazon.com/s3/ > > Basically, if i have 3 raidz2 groups or 4 raidz groups with a total of 20 > 7200 RPM drives is using a cheaper MLC drive going to make things WORSE? > > thanks for the idea though, i may try to ocz vertex > > > On Mon, Jan 4, 2010 at 5:24 PM, tom wagner <mama_j...@hotmail.com> wrote: >> >> Myself and others had good luck with the OCZ vertex. I use two 30GB >> versions and they have very high write and read throughputs for such a cheap >> MLC. >> -- >> This message posted from opensolaris.org >> _______________________________________________ >> zfs-discuss mailing list >> zfs-discuss@opensolaris.org >> http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > > > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss > Regards, -- Al Hopper Logical Approach Inc,Plano,TX a...@logical-approach.com Voice: 972.379.2133 Timezone: US CDT OpenSolaris Governing Board (OGB) Member - Apr 2005 to Mar 2007 http://www.opensolaris.org/os/community/ogb/ogb_2005-2007/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
