Overprovisioning SSD's isn't a major requirement anymore especially if you use a software RAID solution where you can utilize trim (Hence why I noted Ubuntu + Software RAID as opposed to say an LSI RAID card).
Overprovisioning used to add a good amount of life to an SSD, but with all the new garbage collection solutions built into the SSD's as well as the ability to use TRIM with RAID its much less of an issue.
We have large hypervisors for VM hosting using SSD's without any overprovisioning and we see a good 2+ years out of the SSD array before degradation really begins. Those are primarily Intel 520/530's and Samsung 830/840's too.
On the SSD front, there is no real good reason to go drop $1500/2500 on an Intel S3500/3700 or like solutions unless you are have a serious concern about the SSD's lasting 4+ years. We have very heavy MySQL servers pounding standard Intel 520/530's and still get a good 12-18 months out of them before we see a real slow down.
Save the money, get cheaper drives and just plan to replace them(not that you will actually need too, but plan for it) if you have a super busy server.
-Lane -----Original Message----- From: observium [mailto:observium-bounces@observium.org] On Behalf Of Nikolay Shopik Sent: November 11, 2014 6:02 PM To: Observium Network Observation System Subject: Re: [Observium] Performance
If plan to use ssd, make sure leave 25% free space on it or your can have lower performance then expeceted.
On 12 нояб. 2014 г., at 1:18, Adriaan Smuts
adriaan.smuts@webafrica.com wrote:
I second the SSD’s, it makes a huge performance increase.
_______________________________________________ observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium