> From: [email protected] [mailto:[email protected]] > On Behalf Of [email protected] > > having any cache drastically improves the write situation as the writes > can be combined and written more efficantly.
That's a partial truth. If it were ZFS, for example, then a whole bunch of small writes get aggregated into a single sequential write in RAM buffer, but in EXTn, no such thing is possible. What you get with EXT is ... the controller buffers the write, but will not redirect to different disk blocks. So you're able to benefit from increased size of the write buffer queue, and more efficiently leverage the command ordering in the actual disk hardware... But hardware raid isn't going to combine smaller writes into larger sequential writes. _______________________________________________ Tech mailing list [email protected] https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech This list provided by the League of Professional System Administrators http://lopsa.org/
