Re: Do I have a hardware or a software problem?
| От | Niels Kristian Schjødt |
|---|---|
| Тема | Re: Do I have a hardware or a software problem? |
| Дата | |
| Msg-id | C6A943C0-BD00-4CC2-9D37-43EF2D98027F@autouncle.com обсуждение исходный текст |
| Ответ на | Re: Do I have a hardware or a software problem? (Craig Ringer <craig@2ndQuadrant.com>) |
| Ответы |
Re: Do I have a hardware or a software problem?
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| Список | pgsql-performance |
Well, In fact I do (as you can see from my configuration). I have a similar server running with hot standby replication - and it runs two 3T HDD in a RAID1 array.
So - is it still very bad if I choose to put four intel 520 disks in a RAID10 array on the other production server?
Den 12/12/2012 kl. 03.47 skrev Craig Ringer <craig@2ndquadrant.com>:
On 12/12/2012 10:13 AM, Evgeny Shishkin wrote:Yes, i am aware of this issue. Never experienced this neither on intel 520, no ocz vertex 3.
I wouldn't trust either of those drives. The 520 doesn't have Intel's " Enhanced Power Loss Data Protection"; it's going to lose its buffers if it loses power. Similarly, the Vertex 3 doesn't have any kind of power protection. See:
http://www.intel.com/content/www/us/en/solid-state-drives/ssd-320-series-power-loss-data-protection-brief.html
http://ark.intel.com/products/family/56572/Intel-SSD-500-Family
http://www.ocztechnology.com/res/manuals/OCZ_SSD_Breakdown_Q2-11_1.pdf
The only way I'd use those for a production server was if I had synchronous replication running to another machine with trustworthy, durable storage - and if I didn't mind some downtime to restore the corrupt DB from the replica after power loss.-- Craig Ringer http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services
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