<div dir="ltr">Ya, I used nice and ionice to greatly reduce the priority of commercial scanning. It worked but I still think the drive wasn't meant to be used like this. I was seeking all over the place and performance was suffering. </div><br><div class="gmail_quote"><div dir="ltr">On Mon, Jan 14, 2019 at 11:49 AM Greg Oliver <<a href="mailto:oliver.greg@gmail.com">oliver.greg@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">On Mon, Jan 14, 2019 at 12:36 PM Jon Boehm <<a href="mailto:jon.s.boehm@gmail.com" target="_blank">jon.s.boehm@gmail.com</a>> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr">I did it. Grabbed an ADATA 960GB SSD for <span style="font-size:13px;color:rgb(17,17,17);font-family:"Amazon Ember",Arial,sans-serif;text-align:right">$97.74. It was an amazon flash sale. I had a friendly bet with a friend, last summer, we would see off-brand 1TB SSDs for less than $100 by black friday. I did see it for this price but amazon flash sales are short lived. I was lucky and grabbed one when they went back on sale last week. Installed it as my DVR drive yesterday. So far all is fine.</span><div><span style="color:rgb(17,17,17);font-family:"Amazon Ember",Arial,sans-serif;font-size:13px;text-align:right"><br></span></div><div><span style="color:rgb(17,17,17);font-family:"Amazon Ember",Arial,sans-serif;font-size:13px;text-align:right">I'm hoping this will help with New Years Eve or SuperBowl type recording/playback events. Events were most of my 4 tuners are recording, commercial scanning is in working, and I'm playing back a show while its recording. My 5TB (only 1TB allocated to Mythtv) spinning drive was cheap but had poor seek times and I think the SSD should really help. So far FF/RW are more responsive but time will tell if the ADATA drive will last.</span></div></div></div></blockquote><div><br></div><div><div style="font-family:monospace,monospace" class="gmail_default">I have always had 4x HDHRs and 2x HD-PVRs with realtime commflagging going. ISTR that commflagging in realtime was way less intrusive than after, but I ran cgroups on everything that could affect recording and playback. You can get a smooth experience with a little (or a lot) of work. I wrote a wiki article long ago, so some info may be out of date and not be 100% correct any longer, but it gives the backend the I/O needed to record while commflagging and the rest of the system takes a back seat.</div><div style="font-family:monospace,monospace" class="gmail_default"><br></div><div style="font-family:monospace,monospace" class="gmail_default"><a href="https://www.mythtv.org/wiki/Tuning_Linux_for_MythTV:_Using_cgroups" target="_blank">https://www.mythtv.org/wiki/Tuning_Linux_for_MythTV:_Using_cgroups</a></div><div style="font-family:monospace,monospace" class="gmail_default"><br></div><div style="font-family:monospace,monospace" class="gmail_default">Disclaimer: I no longer do this as I have arrays that can handle what is thrown at them, or I would update the doc. I am making a new image for my day job soon, and it uses cgroups, so I will update it then - just waiting on RHEL 8 to be released to migrate to cgroups v2.<br></div><div style="font-family:monospace,monospace" class="gmail_default"><br></div><div style="font-family:monospace,monospace" class="gmail_default">-Greg<br></div><div style="font-family:monospace,monospace" class="gmail_default"></div><div style="font-family:monospace,monospace" class="gmail_default"></div></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div dir="ltr"><div><span style="color:rgb(17,17,17);font-family:"Amazon Ember",Arial,sans-serif;font-size:13px;text-align:right">I started my MythTV days with 2x 250GB and a 500GB spinning drives 12yrs ago. That worked fine but it was to many drives. 1TB has always been my target for recordings.</span></div><div><span style="color:rgb(17,17,17);font-family:"Amazon Ember",Arial,sans-serif;font-size:13px;text-align:right"><br></span></div><div><span style="text-align:right"><font face="Amazon Ember, Arial, sans-serif" color="#111111"><a href="https://www.amazon.com/gp/product/B07K1NB8XN/ref=ppx_od_dt_b_asin_title_o00_s00?ie=UTF8&psc=1" target="_blank">https://www.amazon.com/gp/product/B07K1NB8XN/ref=ppx_od_dt_b_asin_title_o00_s00?ie=UTF8&psc=1</a></font><br></span></div></div></div></blockquote><div style="font-family:monospace,monospace" class="gmail_default"></div></div></div></div>
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