Re: Making the most of memory?
От | Merlin Moncure |
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Тема | Re: Making the most of memory? |
Дата | |
Msg-id | b42b73150801240601l55243f92q12add57a4778e7bc@mail.gmail.com обсуждение исходный текст |
Ответ на | Re: Making the most of memory? (Guy Rouillier <guyr-ml1@burntmail.com>) |
Список | pgsql-performance |
On Jan 23, 2008 2:57 PM, Guy Rouillier <guyr-ml1@burntmail.com> wrote: > Unless somebody has changes some physics recently, I'm not understanding > the recent discussions of SSD in the general press. Flash has a limited > number of writes before it becomes unreliable. On good quality consumer > grade, that's about 300,000 writes, while on industrial grade it's about > 10 times that. That's fine for mp3 players and cameras; even wrong. at 1 million writes (which better flash drives can do) wear leveling, this can be disproved with a simple back of napkin calculation... the major problem with flash drives in the server space is actually random write performance...if random write performed as well as random read for flash ssd, you would be able to replace a stack of 15k sas drives with a single flash ssd in terms of iops. merlin
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