| From: | Alan Hodgson <ahodgson(at)simkin(dot)ca> |
|---|---|
| To: | pgsql-general(at)postgresql(dot)org |
| Subject: | Re: Amazon High I/O instances |
| Date: | 2012-08-22 21:12:38 |
| Message-ID: | 24475703.qrxd6m0HjB@skynet.simkin.ca |
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| Lists: | pgsql-general |
On Wednesday, August 22, 2012 04:10:01 PM Andrew Hannon wrote:
> Just looking into High IO instances for a DB deployment. In order to get
> past 1TB, we are looking at RAID-0. I have heard
> (http://hackerne.ws/item?id=4266119) there might be a problem if TRIM isn't
> supported. Does anyone know if it is and has anyone used RAID-0 on these
> instances? (Linux of course…)
Just use LVM striping. If it turns out to be an issue; that seems to be mostly
conjecture.
I note that the SSDs are only instance storage. The data will be gone when the
instance goes away. I have used instance storage in replicated setups but it
always feels rather fragile unless your data really is transient or you can
maintain 2 replicas.
Their other new service, provisioned IOPS for EBS, might be more useful for a
persistent database. Although not nearly SSD speeds, of course.
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