Opened 9 years ago

Closed 9 years ago

Last modified 9 years ago

#10430 closed Bug Report - General (Duplicate)

0.25 Can't Handle Multiple Simultaneous Recordings

Reported by: Scott <snharris99@…> Owned by:
Priority: blocker Milestone: unknown
Component: MythTV - General Version: Master Head
Severity: high Keywords:
Cc: Ticket locked: no


When trying to record more than one program at once via HdHomeRun? units, the recordings become increasingly unwatchable with each additional simultaneous recording. For example, one recording is perfect, two recordings can be watched but the corruption is annoying, three and four recordings are unwatchable and the recording may even fail or not be playable at all.

The recordings have frequent periods of extreme artifacting and the audio becomes a metallic "buzz". Once two simultaneous recordings is surpassed, recordings may even start to fail completely or playback will not work.

This behavior is consistent (happens every single time) in all 0.25 setups I have tried; a single FE/BE laptop test environment with a fresh install of Mythbuntu 11.10 using Mythbuntu 0.25 repos. Also in a production setup (2 BEs, 4 FEs) on Mythbuntu 10.04 upgraded to from 0.24 to 0.25 via Mythbuntu 0.25 repos.

The behavior is not present when trying similar tests with 0.24.x on any of these setups. On the production setup I can record up to 8 recordings at once with 4 commercial detection jobs going and the recordings are nearly flawless.

Specs for the laptop: Dual core Pentium 4GB memory single SSD hard drive for OS, DB, recordings, etc

Spec for production BE: Core2 Dual 6GB memory 1 individual SATA drive for OS 5 individual SATA drives for recordings 1 individual SSD drive for DB Myth scheduler set to "combination"

The production setup has since be rolled back to 0.24.x due to the inability to record more than one show at a time, however current version of mythbackend for the laptop is attached.

I am not sure what logs or logging options (or with the changes to logging in 0.25, how to grab them) would help, but I am quite happy to run with any options requested and post any output requested to help.

Attachments (1)

myth_version.txt (808 bytes) - added by Scott <snharris99@…> 9 years ago.

Download all attachments as: .zip

Change History (3)

Changed 9 years ago by Scott <snharris99@…>

Attachment: myth_version.txt added

comment:1 Changed 9 years ago by danielk

Resolution: Duplicate
Status: newclosed

This appears to be a dup of #10414, which I've reopened.

comment:2 Changed 9 years ago by danielk

Scott, can you follow up on #10414, in particular I'm interested in whether you are seeing high CPU usage (above 20%).

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