On 07/18/2013 11:48 PM, Rainer Gerhards wrote:
On Fri, Jul 19, 2013 at 1:39 AM, Erik Steffl <[email protected]> wrote:
I have a disk assisted omfwd queue that is set up using following action:
action(
type="omfwd"
target="some.host.com"
port="5140"
protocol="tcp"
template="json"
queue.filename="/mnt/rsyslog-**queue/json"
queue.maxdiskspace="**75161927680" # 70GB
queue.highwatermark="1"
)
I overlooked that yesterday. The filename cannot be a path, must be a plain
name. It is always being created in the working directory (the name is
actually concatenated to the workdir name).
now I get it! I was trying to figure out what exactly this means:
"The value set via queue.filename acts as the basename to be used for
filename creation" (from http://www.rsyslog.com/doc/node33.html that
David pointed me to).
Debugging output shows that it is set up at least sort of properly.
Trying to test it by setting invalid hostname and thge debug output shows
that the syslog will retry but I never see anything created in
/mnt/rsyslog-queue/ directory (or in workdir which is set to
/var/spool/rsyslog).
I thought that if queue.highwatermark is set to one then any pending
messages will be written to disk queue (I wrote tons of mesages to syslog).
setting it to one might not work as expected in any case - it's so low that
this may cause some issues.
Parts of the debug output (rsyslogd -dn) that I think are relevant
included (it's huge so not including everything):
5853.855732748:7fcbd0f0a780: action 5 queue: type 3, enq-only 0, disk
assisted 0, maxFileSz 75161927680, lqsize 0, pqsize 0, child 0, full delay
970, light delay 700, deq batch size 128 starting
5853.855739888:7fcbd0f0a780: Action builtin:omfwd[0x1c39590]: queue
0x1c41ba0 started
any ideas how to debug/troubleshoot the disk queues that assist the
omfwd queues? How to make rsyslogd to write something to disk?
I suggest just sending enough data to it for the test. You can use
rsyslog's own message generator, which was originally developed for the
testbench and is still being used for it:
http://www.rsyslog.com/how-to-use-tcpflood/
great, will use that to test my new fixed queue,
This recent blog posting may also be of interest:
http://blog.gerhards.net/2013/07/rsyslog-why-disk-assisted-queues-keep.html
thanks, it helps to understand bit of internals and whys,
erik
Rainer
thanks,
erik
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