TRACESPLIT(1)

NAME
tracesplit - split traces

SYNOPSIS
tracesplit [ -f bpf | --filter=bpf] [ -j numhdrs | --jump=numhdrs] [ -c count | --count=count] [ -b bytes | --bytes=bytes] [ -i seconds | --seconds=seconds] [ -s unixtime | --starttime=unixtime] [ -e unixtime | --endtime=unixtime] [ -m maxfiles | --maxfiles=maxfiles] [ -S snaplen | --snaplen=snaplen] [ -z level | --compress-level=level] [ -Z method | --compress-type=method] inputuri [inputuri ...] outputuri

DESCRIPTION
tracesplit splits the given input traces into multiple tracefiles

-f bpf filter
    output only packets that match tcpdump style bpf filter

-j numhdrs
    Strip headers before the numhdrs layer 3 header. For example, -j1 will strip off all the layer 2 headers, -j2 will strip off all the l2 headers, the first l3 header, any transport headers, and return a trace that starts at the next l3 header.

-c count
    output count packets per output file. The output file will be named after the basename given in the outputuri with the packet number of the first packet in this file.

-b bytes
    output bytes bytes per file

-i seconds
    start a new tracefile after "seconds" seconds

-s unixtime
    don't output any packets before unixtime

-e unixtime
    don't output any packets after unixtime

-m maxfiles
    do not create more than "maxfiles" trace files

-S snaplen
    Truncate packets to "snaplen" bytes long. The default is collect the entire packet.

-z level
    Compress the data using the specified compression level, ranging from 0 to 9. Higher compression levels tend to result in better compression but require more processing power to compress.

-Z compression-method
    Compress the data using the specified compression algorithm. Accepted methods are "gz", "bz", "lzo", "xz" or "no". Default value is "no" unless a compression level is specified, in which case gzip will be used.

EXAMPLES
create a 1MB erf trace of port 80 traffic.
tracesplit -z 1 -Z gzip -f 'port 80' -b $[ 1024 * 1024 ]
erf:/traces/bigtrace.gz erf:/traces/port80.gz

LINKS
More details about tracesplit (and libtrace) can be found at https://github.com/LibtraceTeam/libtrace/wiki

SEE ALSO
libtrace(3), tracemerge(1), tracefilter(1), traceconvert(1), tracesplit_dir(1), tracereport(1), tracertstats(1), tracestats(1), tracepktdump(1), traceanon(1), tracesummary(1), tracereplay(1), tracediff(1), traceends(1), tracetopends(1)

AUTHORS
Perry Lorier <perry@cs.waikato.ac.nz>