This is normal for CEP, checkpoints are very far apart. If you do not run 24/7 it is best to avoid them

Dear sean0118,
Sleep and hibernation are fine. If you search this forum for this issue you'll find a very detailed discussion.
Best wishes,
Your Harvard CEP team

Although... if you (against the recommendations for CEP2) have the option "Leave applications in memory" off, Boinc (7.0.64) terminates its apps just before sleeping. (I would understand for hibernation - less RAM to write to disk - but why for sleep??) I've just tested & reconfirmed this.


Great news! I'll be sure to check out the sleep behaviour after I upgrade. (For the sake of curiosity... I do run with LAIM on.)
I've had WUs that didn't checkpoint at all between 0h24m and 11h30m (out of ~12h total)! So this setting really matters, e.g. for us folk who just crunch during the day. :-)

With LAIM ON, suspend BOINC first [Activity Menu > Suspend] when hibernating/sleep, then powering up and system is fully up, set BOINC back to "Run Always/Run based on prefs", whatever your normal operating mode is for BOINC. I've asked the devs for the same delay function to kick in as at boot time, the <start_delay> function, but as is often the case, resistance as usual. My hibernate file is usually 6-7GB, the VM 16GB, so it takes time to resume and get the disk to come to rest, which is when CEP2 hangs occur due heavy disk IO [long enough to get a checkpoint reset... hours lost].

If a CEP2 task finishes then zipping is ongoing and the [quite CPU drawing] networking. Same time a new CEP2 task is trying to do the model set-up, which is heavy too, so you risk a system overload... too much storage IO, which is when heartbeat/zero status issues develop [A hated function of BOINC, the devs themselves would love to replace for years but have not]. Remedy: Reduce concurrent CEP2 tasks to half the cores. It's easily controlled with the <max_concurrent> option in a app_config.xml file with the 7.0.4x and higher clients [search forum]. My octo runs 4 and I get 99% efficiency out of them at that. Other cores do MCM or FA@H or anything else non-WCG if the mood is like that.