Loading into RAM , making a mirror!

arsham · 05-08-2007, 07:49 AM

I was surfing a lot and reading articles in this forum , and I've seen lots of question/advises about booting into RAM and ram disks , anyways...

Maybe this will help improving the system read/writes :
How about having a mirror in RAM ?
I mean : after bootup , make a ram disk and copy entire /usr directory in there , then with each read , just look into memory , and in each write , write into RAM and hard disk together

At least reading will be faster than before , and we will not have any data lost

Is it possible?

IsaacKuo · 05-08-2007, 10:18 AM

The operating system's disk cache will automatically do that with any spare RAM. The only thing is that it needs an excuse to read the entire /usr directory first. You could insert a command which cat's the entire /usr directory to /dev/null.

arsham · 05-09-2007, 03:10 AM

Quote:

Originally Posted by IsaacKuo

The operating system's disk cache will automatically do that with any spare RAM. The only thing is that it needs an excuse to read the entire /usr directory first. You could insert a command which cat's the entire /usr directory to /dev/null.

Hi
Thats right , but after that caching , for example if you load couple big (x) files into memory , kernel will slightly push oldest cache away , instead of our expecting pushing old (x) cached file and keep /usr cache in memory

Anyways you are right , cat the whole /usr section in a way

Any other ideas ?

Regards
Arsham