Re: Tip: Your next XRaid may be an SSD
Re: Tip: Your next XRaid may be an SSD
- Subject: Re: Tip: Your next XRaid may be an SSD
- From: Miguel Arroz <email@hidden>
- Date: Mon, 15 Dec 2008 22:27:43 +0000
Hi!
Excellent email! I've been arguing for some time now that SSD is the
way to go for DBs, it's good that some real evidence is showing up.
Seek time kills DBs. :)
New Schema, FB5, RDD=(various), 8198 lines/second.
And ALL the software (and hardware) is optimized for hard drives.
Imagine when they optimize it for SSDs... :D
So I'm seriously looking into switching from our XRaid to a set of
SSD drives in production. However, there are some challenges with
this:
1. Intel only makes the SSD in 1.8 and 2.5" form factors. Which
means most rack mount raid enclosures can't hold the drives. IcyDock
makes an adaptor for $20. But there will be LOTS of wasted space.
Which is an issue later on.
Most server manufacturares will be able to sell you servers and
storage with 2.5" bays. I don't know if they predicted the obvious, or
if it's just for power, heat dissipation and density purposes, but
some people are already using 2.5" drives on their servers.
Another challenge might be reliability. From what I've heard, flash
disks are still too unreliable, and the memory cells die very often.
I've even read somewhere that they make SSD drives in such a way that
the capacity decreases with time, as dead cells are removed from
operation. I find this very strange because it brings obvious file
system management problems, but as I never used one, I totally lack
experience.
Yours
Miguel Arroz
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