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<p>There is standard limit of 1024 files open at once per process.
You can change this in a shell with 'ulimit -n 2048' (for
example). There is also way of changing it system wide in systemd
(<spit>) but you'll have to research that yourself or start
the node in a shell script like:</p>
#!/bin/sh<br>
ulimit -n 2048<br>
/spider/perl/cluster.pl
<p>Personally, 900+ users on a 4GB RPi x is going some, especially
considering power required to run some windows cluster software
(and then still not keeping).</p>
<p>What does your 'top' say when you are running it at this sort of
usage?</p>
<p>Dirk G1TLH <br>
</p>
<div class="moz-cite-prefix">On 23/03/2025 18:54, Keith, G6NHU via
Dxspider-support wrote:<br>
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<div dir="auto">I suppose this really is for Dirk.<br>
<br>
This has never happened before - I came into the shack with a
freshly poured shackbeer and noticed my ssh session had closed
so I logged back in and saw my uptime was just 21 minutes.<br>
<br>
Checking the debug log (attached as a .zip), this is what
happened in the same timestamp with the actual error that
caused the crash being at the end.<br>
<br>
My cluster is running on a Pi5 with 4Gb RAM and an external
Samsung SSD. I don’t know the exact number of connected
users but when I logged back on, there were 938 so I’d imagine
the number prior to the crash was around the same. The node
had been up for about a month.<br>
<br>
“Too many open files” ?<br>
<br>
73 Keith<br>
<br>
1742753087^###<br>
1742753087^### RINGBUFFER END 501 debug lines written<br>
1742753087^###<br>
1742753087^(trace) writing /spider/local_data/rbn_cache Too
many open files<br>
1742753087^(trace) Stack (2): RBN::DXDebug::confess in
/spider/perl/RBN.pm line: 926<br>
1742753087^(trace) Stack (3): RBN::RBN::write_cache in
/spider/perl/RBN.pm line: 871<br>
1742753087^(trace) Stack (4): main::RBN::per_minute in
/spider/perl/<a href="http://cluster.pl" target="_blank"
moz-do-not-send="true">cluster.pl</a> line: 892<br>
1742753087^(*) DXSpider Ceasing<br>
1742753087^(*) DXQSL finished<br>
1742753087^(*) RBN:WRITE_CACHE size: 423.804KB time to write:
26 mS<br>
1742753087^(*) DXDupe finishing<br>
1742753087^(*) DXUser finished<br>
1742753087^(cluster) DXSpider v1.57 build 568 (git:
mojo/0920a333[r]) using perl v5.36.0 on linux ended<br>
1742753087^(*) bye bye everyone - bye bye<br>
1742753087^###<br>
1742753087^### RINGBUFFER START at line 0 (zero base)<br>
1742753087^###<br>
<br>
Then it repeats<br>
<br>
1742753087^RING: 18:04:47^(trace) writing
/spider/local_data/rbn_cache Too many open files<br>
1742753087^RING: 18:04:47^(trace) Stack (2):
RBN::DXDebug::confess in /spider/perl/RBN.pm line: 926<br>
1742753087^RING: 18:04:47^(trace) Stack (3):
RBN::RBN::write_cache in /spider/perl/RBN.pm line: 871<br>
1742753087^RING: 18:04:47^(trace) Stack (4):
main::RBN::per_minute in /spider/perl/<a
href="http://cluster.pl" target="_blank"
moz-do-not-send="true">cluster.pl</a> line: 892<br>
1742753087^RING: 18:04:47^(*) DXSpider Ceasing<br>
1742753087^RING: 18:04:47^(*) DXQSL finished<br>
1742753087^RING: 18:04:47^(*) RBN:WRITE_CACHE size: 423.804KB
time to write: 26 mS<br>
1742753087^RING: 18:04:47^(*) DXDupe finishing<br>
1742753087^RING: 18:04:47^(*) DXUser finished<br>
1742753087^RING: 18:04:47^(cluster) DXSpider v1.57 build 568
(git: mojo/0920a333[r]) using perl v5.36.0 on linux ended<br>
1742753087^RING: 18:04:47^(*) bye bye everyone - bye bye<br>
1742753087^###<br>
1742753087^### RINGBUFFER END 501 debug lines written<br>
1742753087^###</div>
</div>
<br>
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