609 lines
16 KiB
Groff
609 lines
16 KiB
Groff
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..
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.TH "SCARDAC" "1" "Oct 14, 2025" "6.9.1" "SeisComP"
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.SH NAME
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scardac \- SeisComP Documentation
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.sp
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\fBWaveform archive data availability collector.\fP
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.SH DESCRIPTION
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.sp
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scardac scans an \fI\%SDS waveform archive\fP, e.g.,
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created by \fI\%slarchive\fP or \fI\%scart\fP for available
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\fI\%miniSEED\fP data. It will collect information about
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.INDENT 0.0
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.IP \(bu 2
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\fBDataExtents\fP \-\- the earliest and latest times data is available
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for a particular channel,
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.IP \(bu 2
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\fBDataAttributeExtents\fP \-\- the earliest and latest times data is available
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for a particular channel, quality and sampling rate combination,
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.IP \(bu 2
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\fBDataSegments\fP \-\- continuous data segments sharing the same quality and
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sampling rate attributes.
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.UNINDENT
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.sp
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scardac is intended to be executed periodically, e.g., as a cronjob.
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.sp
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The availability data information is stored in the SeisComP database under the
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root element \fI\%DataAvailability\fP\&. Access to the
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availability data is provided by the \fI\%fdsnws\fP module via the services:
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.INDENT 0.0
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.IP \(bu 2
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\fI\%/fdsnws/station\fP (extent information only, see
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\fBmatchtimeseries\fP and \fBincludeavailability\fP request parameters).
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.IP \(bu 2
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\fI\%/fdsnws/ext/availability\fP (extent and segment information
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provided in different formats)
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.UNINDENT
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.SS Non\-SDS archives
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.sp
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scardac can be extended by plugins to scan non\-SDS archives. For example the
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\fBdaccaps\fP plugin provided by \fICAPS\fP [\fI\%3\fP] allows scanning archives generated
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by a CAPS server. Plugins are added to the global module configuration, e.g.:
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.INDENT 0.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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plugins = ${plugins}, daccaps
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.SS Definitions
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.INDENT 0.0
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.IP \(bu 2
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\fBRecord\fP \-\- continuous waveform data of same sampling rate and quality bound
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by a start and end time. scardac will only read the record\(aqs meta data and not
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the actual samples.
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.IP \(bu 2
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\fBChunk\fP \-\- container for records, e.g., a \fI\%miniSEED\fP file,
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with the following properties:
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.INDENT 2.0
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.IP \(bu 2
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overall, theoretical time range of records it may contain
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.IP \(bu 2
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contains at least one record, otherwise it must be absent
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.IP \(bu 2
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each record of a chunk must fulfill the following conditions:
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.INDENT 2.0
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.IP \(bu 2
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\fIchunk start <= record start < chunk end\fP
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.IP \(bu 2
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\fIchunk start < record end < next chunk end\fP
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.UNINDENT
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.IP \(bu 2
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chunks do not overlap, end time of current chunk equals start time of
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successive chunk, otherwise a \fBchunk gap\fP is declared
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.IP \(bu 2
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records may occur unordered within a chunk or across chunk boundaries,
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resulting in \fIDataSegments\fP marked as \fBoutOfOrder\fP
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.UNINDENT
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.IP \(bu 2
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\fBJitter\fP \-\- maximum allowed deviation between the end time of the current
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record and the start time of the next record in multiples of the current\(aqs
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record sampling rate. E.g., assuming a sampling rate of 100Hz and a jitter
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of 0.5 will allow for a maximum end to start time difference of 50ms. If
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exceeded a new \fIDataSegment\fP is created.
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.IP \(bu 2
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\fBMtime\fP \-\- time the content of a chunk was last modified. It is used to
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.INDENT 2.0
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.IP \(bu 2
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decided whether a chunk needs to be read in a secondary application run
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.IP \(bu 2
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calculate the \fBupdated\fP time stamp of a \fIDataSegment\fP,
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\fIDataAttributeExtent\fP and \fIDataExtent\fP
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.UNINDENT
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.IP \(bu 2
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\fBScan window\fP \-\- time window limiting the synchronization of the archive
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with the database configured via \fI\%filter.time.start\fP and
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\fI\%filter.time.end\fP respectively \fB\-\-start\fP and \fB\-\-end\fP\&.
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The scan window is useful to
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.INDENT 2.0
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.IP \(bu 2
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reduce the scan time of larger archives. Depending on the size and storage
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type of the archive it may take some time to just list available chunks and
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their mtime.
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.IP \(bu 2
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prevent deletion of availability information even though parts of the
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archive have been deleted or moved to a different location
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.UNINDENT
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.IP \(bu 2
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\fBModification window\fP \-\- the mtime of a chunk is compared with this time
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window to decide whether it needs to be read or not. It is configured via
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\fI\%mtime.start\fP and \fI\%mtime.end\fP repectively
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\fB\-\-modified\-since\fP and \fB\-\-modified\-until\fP\&. If no lower bound
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is defined then the \fBlastScan\fP time stored in the \fIDataExtent\fP is used
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instead. The mtime check may be disabled using \fI\%mtime.ignore\fP or
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\fB\-\-deep\-scan\fP\&.
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\fBNote:\fP Chunks in front or right after a chunk gap are read in any case
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regardless of the mtime settings.
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.UNINDENT
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.SS Workflow
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.INDENT 0.0
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.IP 1. 3
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Read existing \fIDataExtents\fP from database.
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.IP 2. 3
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Collect a list of available stream IDs either by
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.INDENT 3.0
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.IP \(bu 2
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scanning the archive for available IDs or
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.IP \(bu 2
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reading an ID file defined by \fI\%nslcFile\fP\&.
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.UNINDENT
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.IP 3. 3
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Identify extents to add, update or remove respecting \fIscan window\fP,
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\fI\%filter.nslc.include\fP and \fI\%filter.nslc.exclude\fP\&.
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.IP 4. 3
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Subsequently process the \fIDataExtents\fP using \fI\%threads\fP number of
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parallel threads. For each \fIDataExtent\fP:
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.INDENT 3.0
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.IP 1. 3
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Collect all available chunks within \fIscan window\fP\&.
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.IP 2. 3
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If the \fIDataExtent\fP is new (no database entry yet), store a new and
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empty \fIDataExtent\fP to database, else query existing \fIDataSegments\fP from
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the database:
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.INDENT 3.0
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.IP \(bu 2
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count segments outside \fIscan window\fP
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.IP \(bu 2
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create a database iterator for extents within \fIscan window\fP
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.UNINDENT
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.IP 3. 3
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Create two in\-memory segment lists which collect segments to remove and
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segments to add/update
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.IP 4. 3
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For each chunk
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.INDENT 3.0
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.IP \(bu 2
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determine the \fIchunk window\fP and \fImtime\fP
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.IP \(bu 2
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decide whether the chunk needs to be read depending on the \fImtime\fP
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and a possible \fIchunk gap\fP\&. If necessary, read the chunk and
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.INDENT 3.0
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.IP \(bu 2
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create chunk segments by analyzing the chunk records for
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gaps/overlaps defined by \fI\%jitter\fP, sampling rate or quality
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changes
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.IP \(bu 2
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merge chunk segments with database segments and update the in\-memory
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segment lists.
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.UNINDENT
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.sp
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If not necessary, advance the database segment iterator to the end
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of the chunk window.
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.UNINDENT
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.IP 5. 3
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Remove and then add/update the collected segments.
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.IP 6. 3
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Merge segment information into \fIDataAttributeExtents\fP
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.IP 7. 3
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Merge \fIDataAttributeExtents\fP into overall \fIDataExtent\fP
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.UNINDENT
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.UNINDENT
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.SS Examples
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.INDENT 0.0
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.IP 1. 3
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Get command line help or execute scardac with default parameters and informative
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debug output:
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.INDENT 3.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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scardac \-h
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scardac \-\-debug
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.IP 2. 3
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Synchronize the availability of waveform data files existing in the standard
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\fI\%SDS\fP archive with the seiscomp database and create an XML file using
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\fI\%scxmldump\fP:
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.INDENT 3.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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scardac \-d mysql://sysop:sysop@localhost/seiscomp \-a $SEISCOMP_ROOT/var/lib/archive \-\-debug
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scxmldump \-Yf \-d mysql://sysop:sysop@localhost/seiscomp \-o availability.xml
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.IP 3. 3
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Synchronize the availability of waveform data files existing in the standard
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\fI\%SDS\fP archive with the seiscomp database. Use \fI\%fdsnws\fP to fetch a flat file containing a list
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of periods of available data from stations of the CX network sharing the same
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quality and sampling rate attributes:
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.INDENT 3.0
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.INDENT 3.5
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.sp
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.nf
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.ft C
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scardac \-d mysql://sysop:sysop@localhost/seiscomp \-a $SEISCOMP_ROOT/var/lib/archive
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wget \-O availability.txt \(aqhttp://localhost:8080/fdsnws/ext/availability/1/query?network=CX\(aq
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.ft P
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.fi
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.UNINDENT
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.UNINDENT
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.sp
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\fBNOTE:\fP
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.INDENT 3.0
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.INDENT 3.5
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The \fISeisComP\fP module \fI\%fdsnws\fP must be running for executing this
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example.
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.UNINDENT
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.UNINDENT
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.UNINDENT
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.SH MODULE CONFIGURATION
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.nf
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\fBetc/defaults/global.cfg\fP
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\fBetc/defaults/scardac.cfg\fP
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\fBetc/global.cfg\fP
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\fBetc/scardac.cfg\fP
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\fB~/.seiscomp/global.cfg\fP
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\fB~/.seiscomp/scardac.cfg\fP
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.fi
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.sp
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.sp
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scardac inherits \fI\%global options\fP\&.
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.INDENT 0.0
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.TP
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.B archive
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Default: \fB@SEISCOMP_ROOT@/var/lib/archive\fP
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.sp
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Type: \fIstring\fP
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.sp
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The URL to the waveform archive where all data is stored.
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.sp
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Format: [\fI\%service://\fP]location[#type]
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.sp
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\(dqservice\(dq: The type of the archive. If not given,
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\(dqsds://\(dq is implied assuming an SDS archive. The SDS
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archive structure is defined as
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YEAR/NET/STA/CHA/NET.STA.LOC.CHA.YEAR.DAYFYEAR, e.g.
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2018/GE/APE/BHZ.D/GE.APE..BHZ.D.2018.125
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.sp
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Other archive types may be considered by plugins.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B threads
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Default: \fB1\fP
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.sp
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Type: \fIint\fP
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.sp
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Number of threads scanning the archive in parallel.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B jitter
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Default: \fB0.5\fP
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.sp
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Type: \fIfloat\fP
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.sp
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Acceptable derivation of end time and start time of successive
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records in multiples of sample time.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B maxSegments
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Default: \fB1000000\fP
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.sp
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Type: \fIint\fP
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.sp
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Maximum number of segments per stream. If the limit is reached
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no more segments are added to the database and the corresponding
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extent is flagged as too fragmented. Set this parameter to 0 to
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disable any limits.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B nslcFile
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Type: \fIstring\fP
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.sp
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Line\-based text file of form NET.STA.LOC.CHA defining available
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stream IDs. Depending on the archive type, size and storage
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media used this file may offer a significant performance
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improvement compared to collecting the available streams on each
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startup. Filters defined under \fIfilter.nslc\fP still apply.
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.UNINDENT
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.sp
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\fBNOTE:\fP
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.INDENT 0.0
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.INDENT 3.5
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\fBfilter.*\fP
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\fIParameters of this section limit the data processing to either\fP
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**
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\fIreduce the scan time of larger archives or to\fP
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**
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\fIprevent deletion of availability information even though parts\fP
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\fIof the archive have been deleted or moved to a different\fP
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\fIlocation.\fP
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.UNINDENT
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.UNINDENT
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.sp
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\fBNOTE:\fP
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.INDENT 0.0
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.INDENT 3.5
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\fBfilter.time.*\fP
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\fILimit the processing by record time.\fP
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B filter.time.start
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Type: \fIstring\fP
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.sp
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Start of data availability check given as date string or
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as number of days before now.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B filter.time.end
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Type: \fIstring\fP
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.sp
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End of data availability check given as date string or
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as number of days before now.
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.UNINDENT
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.sp
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\fBNOTE:\fP
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.INDENT 0.0
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.INDENT 3.5
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\fBfilter.nslc.*\fP
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\fILimit the processing by stream IDs.\fP
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B filter.nslc.include
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Type: \fIlist:string\fP
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.sp
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Comma\-separated list of stream IDs to process. If
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empty all streams are accepted unless an exclude filter
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is defined. The following wildcards are supported: \(aq*\(aq
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and \(aq?\(aq.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B filter.nslc.exclude
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Type: \fIlist:string\fP
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.sp
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Comma\-separated list of stream IDs to exclude from
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processing. Excludes take precedence over includes. The
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following wildcards are supported: \(aq*\(aq and \(aq?\(aq.
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.UNINDENT
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.sp
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\fBNOTE:\fP
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.INDENT 0.0
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.INDENT 3.5
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\fBmtime.*\fP
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\fIParameters of this section control the rescan of data chunks.\fP
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\fIBy default the last update time of the extent is compared with\fP
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\fIthe record file modification time to read only files modified\fP
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\fIsince the list run.\fP
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.UNINDENT
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.UNINDENT
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.INDENT 0.0
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.TP
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.B mtime.ignore
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Default: \fBfalse\fP
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.sp
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Type: \fIboolean\fP
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.sp
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If set to true all data chunks are read independent of their
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mtime.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B mtime.start
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Type: \fIstring\fP
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.sp
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Only read chunks modified after specific date given as date
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string or as number of days before now.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B mtime.end
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Type: \fIstring\fP
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.sp
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Only read chunks modified before specific date given as date
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string or as number of days before now.
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.UNINDENT
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.SH COMMAND-LINE OPTIONS
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.sp
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\fBscardac [OPTION]...\fP
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.SS Generic
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.INDENT 0.0
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.TP
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.B \-h, \-\-help
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Show help message.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-V, \-\-version
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Show version information.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-config\-file arg
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Use alternative configuration file. When this option is
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used the loading of all stages is disabled. Only the
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given configuration file is parsed and used. To use
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another name for the configuration create a symbolic
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link of the application or copy it. Example:
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scautopick \-> scautopick2.
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-\-plugins arg
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Load given plugins.
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.UNINDENT
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.SS Verbosity
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.INDENT 0.0
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.TP
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.B \-\-verbosity arg
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Verbosity level [0..4]. 0:quiet, 1:error, 2:warning, 3:info,
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4:debug.
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.UNINDENT
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.INDENT 0.0
|
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.TP
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.B \-v, \-\-v
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Increase verbosity level (may be repeated, eg. \-vv).
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.UNINDENT
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.INDENT 0.0
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.TP
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.B \-q, \-\-quiet
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Quiet mode: no logging output.
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.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-print\-component arg
|
|
For each log entry print the component right after the
|
|
log level. By default the component output is enabled
|
|
for file output but disabled for console output.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-component arg
|
|
Limit the logging to a certain component. This option can
|
|
be given more than once.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-s, \-\-syslog
|
|
Use syslog logging backend. The output usually goes to
|
|
/var/lib/messages.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-l, \-\-lockfile arg
|
|
Path to lock file.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-console arg
|
|
Send log output to stdout.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-debug
|
|
Execute in debug mode.
|
|
Equivalent to \-\-verbosity=4 \-\-console=1 .
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-trace
|
|
Execute in trace mode.
|
|
Equivalent to \-\-verbosity=4 \-\-console=1 \-\-print\-component=1
|
|
\-\-print\-context=1 .
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-log\-file arg
|
|
Use alternative log file.
|
|
.UNINDENT
|
|
.SS Collector
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-a, \-\-archive arg
|
|
Overrides configuration parameter \fI\%archive\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-threads arg
|
|
Overrides configuration parameter \fI\%threads\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-j, \-\-jitter arg
|
|
Overrides configuration parameter \fI\%jitter\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-nslc arg
|
|
Overrides configuration parameter \fI\%nslcFile\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-start arg
|
|
Overrides configuration parameter \fI\%filter.time.start\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-end arg
|
|
Overrides configuration parameter \fI\%filter.time.end\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-include arg
|
|
Overrides configuration parameter \fI\%filter.nslc.include\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-exclude arg
|
|
Overrides configuration parameter \fI\%filter.nslc.exclude\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-deep\-scan
|
|
Overrides configuration parameter \fI\%mtime.ignore\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-modified\-since arg
|
|
Overrides configuration parameter \fI\%mtime.start\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-modified\-until arg
|
|
Overrides configuration parameter \fI\%mtime.end\fP\&.
|
|
.UNINDENT
|
|
.INDENT 0.0
|
|
.TP
|
|
.B \-\-generate\-test\-data arg
|
|
Do not scan the archive but generate test data for each
|
|
stream in the inventory. Format:
|
|
days,gaps,gapslen,overlaps,overlaplen. E.g., the following
|
|
parameter list would generate test data for 100 days
|
|
(starting from now()\-100) which includes 150 gaps with a
|
|
length of 2.5s followed by 50 overlaps with an overlap of
|
|
5s: \-\-generate\-test\-data=100,150,2.5,50,5
|
|
.UNINDENT
|
|
.SH AUTHOR
|
|
gempa GmbH, GFZ Potsdam
|
|
.SH COPYRIGHT
|
|
gempa GmbH, GFZ Potsdam
|
|
.\" Generated by docutils manpage writer.
|
|
.
|