Fast write to file. How to ?

zmau · 05-19-2014, 03:29 PM

Hi,

I have a program which receives pictures at a high rate (lets say at 100 Hz).

The picture's size is about 1 MB (let say 1 MB).
The picture's are to be recorded to the disk for later inspection (sustain rate = 100 MB/Sec).
The disk is an SSD (SATA 2.0 - theoretically 3 Gbit/Sec).
This is the only "disk activity" during the whole run time.
The program runs for 20 minutes ==>> total of 120 GB.

The file system is not decided yet.

So the question is : How to do it ?
1) Which file system is best ?
2) Is there a "well known solution" to this issue ?
3) Are there code recommendations ?
4) Any suggested code to do this ?
5) With/Without "journal" ?

Finally, is this the best place to put the question ?

Thanks
zmau

jailbait · 05-19-2014, 04:23 PM

Quote:

Originally Posted by zmau

2) Is there a "well known solution" to this issue ?
3) Are there code recommendations ?
4) Any suggested code to do this ?

The main difference between using a hard drive and using a SSD in Linux is that you should use the TRIM feature on a SSD in Linux.

http://www.techrepublic.com/blog/lin...ge-with-linux/

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Steve Stites

metaschima · 05-19-2014, 04:24 PM

Here is a filesystem benchmark, a bit old, but newer ones are lacking.
http://www.phoronix.com/scan.php?pag...38_large&num=1

Code ? I thought you said you have a program that does this. Where does/will it get the pictures from ? the internet ? other computers ?