<div dir="ltr"><br><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Does enabling "Auto-commercial-detection jobs when recording starts" add a significant amount of overhead to the system? Right now, I can simultaneously record three shows (via HD Prime) onto two physical hard drives, while I'm watching a previously recorded show without issue. I'm just wondering if the additional commercial detection (3 max) would be too much for the system.<br>
</blockquote><div><br></div><div style>Every system is different, however I can do it just fine with the following specs:</div><div style><br></div><div style>Pentium G540</div><div style>8GB RAM</div><div style>3x5400 RPM SATA-II recording drives</div>
<div style> - OS/DB resides in a software raid 1 array spanning all 3 drives, however only a small small partition of the drives is raided</div><div style> - Swap is defined on all 3 drives.</div><div style><br></div><div style>
I/O will be your greatest concern, as the backend doesn't really have much CPU overhead, and the commercial detection runs at a low priority. With a absolute maximum of 38.8 Mbits/sec (ATSC spec max) per recording (you will never see this), writing 3 streams and reading 2 will result in 194Mb/sec or 24 MB/sec of I/O; well below the the max of most hard drives. At this point its all about your drive's seek times, fragmentation, etc.</div>
<div style><br></div><div style>Odds are your system can handle it no problem.</div></div><br></div></div>