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Thread: Linux and HDD cache
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- Join Date
- Jun 2013
Linux and HDD cache
I'm looking for an answer to why, if linux has a built in function that cache disk writes, would I need a cache on my RAID card?
Is it a "bad" caching feature in some way?
I have alot of servers, now I'm working on a laboration server to have at home, nothing important on it so I don't need a RAID-card with a bbu for write security or anything like that.
What I do need is some speed...
The RAID card that I have left over have no cache at all. The card works perfectly except the performance is really bad. It has to confirm all writes to disk and that takes an awful amount of time.
I used a SSD-drive for handing the cache and that works alot faster, problem with SSDs is that they can only handle so many R/W before they die.
I can use a RAM-drive also.
I can buy a RAID-card with cache.
But why don't the built in function handle it for me?
Sometimes, real fast is almost as good as real time.
- Join Date
- Apr 2009
- I can be found either 40 miles west of Chicago, in Chicago, or in a galaxy far, far away.
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