Re: Hardware recommendation: which is best
От | Franz.Rasper@izb.de |
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Тема | Re: Hardware recommendation: which is best |
Дата | |
Msg-id | 11EC9A592C31034C88965C87AF18C2A702B8369F@m0000s61 обсуждение исходный текст |
Ответ на | Hardware recommendation: which is best ("Phoenix Kiula" <phoenix.kiula@gmail.com>) |
Список | pgsql-general |
>The point people are trying to make to you is that the differences between >RAID controllers can be as big as that between RAID architectures in cases >like yours. Which controller you're using and how the cache is setup can >have a larger impact on INSERT performance than how many/what type of >disks are involved. If you've comparing a fast SAS controller to a slow >SATA2 one, than the SAS setup may very well run faster no matter how many >disks the SATA2 one has. Conversely, it's not unheard of to have a SAS >controller with such miserable operating system drivers that there is no >performance advantage to using faster SCSI disks instead of SATA2. >You're not going to get a particularly useful answer here without giving >some specifics about the two disk controllers you're comparing, how much >cache they have, and whether they include a battery backup. Exactly, thats the point.
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