Posts by Kennywor

1) Message boards : Number crunching : Disk space calculation way off (BTRFS) (Message 96000) Posted 4 May 2020 by Kennywor Post: Hello! I just noticed this today. The disk space usage drastically reduced very recently, and I see I've received the newer application. From ~10GB to ~1GB. I checked what was going on with compsize and the 1GB is the native size (before compression, etc.). That's quite a reduction! Very nice. It looks like it was released the same day you posted. Just-in-time releases. ;-)
2) Message boards : Rosetta@home Science : A quantum Rosetta Client? D-Wave offering free use of their Quantum Computer for anyone working on Covid19 (Message 95999) Posted 4 May 2020 by Kennywor Post: Sounds like a PhD for someone.
3) Message boards : Number crunching : Disk space calculation way off (BTRFS) (Message 95541) Posted 29 Apr 2020 by Kennywor Post: https://boinc.berkeley.edu/forum_thread.php?id=13662
4) Message boards : Number crunching : Disk space calculation way off (BTRFS) (Message 95540) Posted 29 Apr 2020 by Kennywor Post: $ sudo du -sh /var/lib/boinc-client 8.4G /var/lib/boinc-client Turns out the numbers just might make sense. Data directory: /var/lib/boinc-client Indeed. It would appear that BOINC looks at its data directory usage and compares it to do the amount available on that particular disk. Given that I mounted the slots directory on a difference disk, BOINC had a brain fart. Moving the mount to /var/lib/boinc-client, allows BOINC to correctly calculate disk space details. We'll see if anyone is interested in fixing this over at the BOINC bug tracker.
5) Message boards : Number crunching : Disk space calculation way off (BTRFS) (Message 95538) Posted 29 Apr 2020 by Kennywor Post: I realised after posting that the fault will be with BOINC, not R@H. Still looking at it.
6) Message boards : Number crunching : Disk space calculation way off (BTRFS) (Message 95537) Posted 29 Apr 2020 by Kennywor Post: Hello! To do my tiny bit during the COVID nightmare I decided to fire up some VMs exclusively to run Rosetta. I also plan on running it on (capable) local PCs too (they already crunch other stuff). Because you pay for EVERYTHING when running a VM then it made sense to me to use a filesystem that could make things "nicer". In steps BTRFS with compression and deduplication. An initial 10 GB disk filled (though in hindsight it probably didn't), until deduped and compressed down to ~800 MB. Unfortunately, this didn't actually help much. [Rosetta@home] Rosetta needs 582.77MB more disk space. You currently have 1133.85 MB available and it needs 1716.61 MB. Hmm... This number makes no sense in any context. $ df -hl $ df -hl Filesystem Size Used Avail Use% Mounted on /dev/root 9.6G 2.2G 7.4G 23% / devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm tmpfs 3.2G 968K 3.2G 1% /run tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 16G 0 16G 0% /sys/fs/cgroup /dev/sda15 105M 3.9M 101M 4% /boot/efi /dev/loop0 99M 99M 0 100% /snap/google-cloud-sdk/128 /dev/loop1 69M 69M 0 100% /snap/lxd/14804 /dev/loop2 55M 55M 0 100% /snap/core18/1705 /dev/loop3 28M 28M 0 100% /snap/snapd/7264 /dev/sdb 20G 736M 19G 4% /var/lib/boinc-client/slots tmpfs 3.2G 0 3.2G 0% /run/user/1001 $ sudo btrfs de u /var/lib/boinc-client/slots /dev/sdb, ID: 1 Device size: 10.00GiB Device slack: 0.00B Data,single: 4.01GiB Metadata,RAID1: 256.00MiB Metadata,DUP: 512.00MiB System,RAID1: 32.00MiB System,DUP: 16.00MiB Unallocated: 5.20GiB /dev/sdc, ID: 2 Device size: 10.00GiB Device slack: 0.00B Metadata,RAID1: 256.00MiB System,RAID1: 32.00MiB Unallocated: 9.72GiB $ sudo btrfs fi u /var/lib/boinc-client/slots Overall: Device size: 20.00GiB Device allocated: 5.09GiB Device unallocated: 14.91GiB Device missing: 0.00B Used: 729.63MiB Free (estimated): 18.31GiB (min: 10.85GiB) Data ratio: 1.00 Metadata ratio: 2.00 Global reserve: 4.91MiB (used: 0.00B) Data,single: Size:4.01GiB, Used:630.63MiB (15.37%) /dev/sdb 4.01GiB Metadata,RAID1: Size:256.00MiB, Used:12.64MiB (4.94%) /dev/sdb 256.00MiB /dev/sdc 256.00MiB Metadata,DUP: Size:256.00MiB, Used:36.84MiB (14.39%) /dev/sdb 512.00MiB System,RAID1: Size:32.00MiB, Used:16.00KiB (0.05%) /dev/sdb 32.00MiB /dev/sdc 32.00MiB System,DUP: Size:8.00MiB, Used:0.00B (0.00%) /dev/sdb 16.00MiB Unallocated: /dev/sdb 5.20GiB /dev/sdc 9.72GiB $ sudo du -sh /var/lib/boinc-client 8.4G /var/lib/boinc-client As you can see I even tried adding another 10GB but it made no difference. The client has no limits set on it (i.e. it can use 100% of all disks available to it). I also tried the latest build from the Ubuntu PPA and restarting but it made no difference at all. To be honest, I didn't expect it to. Because of this disk space weirdness, the best I could achieve is 8 instances of R@H (8 CPUs). Adding anything more is a waste of time. I could probably force additional BOINC instances onto additional partitions, but... :-/ So, before blaming BTRFS, which I now run on all new machines... help? For those unaware: BTRFS is expected to replace EXT2,3,4 so apps will need to work with it.
7) Message boards : Cafe Rosetta : Kings Distributed Systems - Alpha Registration (Message 89820) Posted 2 Nov 2018 by Kennywor Post: hnW_a1WdrvDxeak2C0AyluHkrx2XJDVK
8) Message boards : Number crunching : BOINC in Java code (Message 56364) Posted 14 Oct 2008 by Kennywor Post: I have downloaded this application but cannot seem to install it on my phone, how do we do this? I have a Sony Ericsson W850i The developers have re-released the code using CVS, you should look at the SF page for details. The code, though, is written in Java SE, so it will need to be converted to Java ME to run on your mobile phone (I'm testing on a Sony Ericsson K610i), but I have not yet been successful. I certainly haven't given up though, there's at least three Sony Ericsson phones here that could be crunching WUs. :-) Only SETI has been ported to Java at the moment anyway, you would need to obtain the source code, and port it manually, for each product if it is available for download. Remember: the code is pre-alpha, moving WUs around needs to be done manually also.