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indexer - Online in the Cloud

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This is the command indexer that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


indexer - Sphinxsearch fulltext index generator

SYNOPSIS


indexer [--config CONFIGFILE] [--rotate] [--noprogress | --quiet] [--all | INDEX | ...]

indexer --buildstops OUTPUTFILE COUNT [--config CONFIGFILE] [--noprogress | --quiet]
[--all | INDEX | ...]

indexer --merge MAIN_INDEX DELTA_INDEX [--config CONFIGFILE] [--rotate] [--noprogress |
--quiet]

DESCRIPTION


Sphinx is a collection of programs that aim to provide high quality fulltext search.

indexer is the first of the two principle tools as part of Sphinx. Invoked from either the
command line directly, or as part of a larger script, indexer is solely responsible for
gathering the data that will be searchable.

The calling syntax for indexer is as follows:

$ indexer [OPTIONS] [indexname1 [indexname2 [...]]]

Essentially you would list the different possible indexes (that you would later make
available to search) in sphinx.conf, so when calling indexer, as a minimum you need to be
telling it what index (or indexes) you want to index.

If sphinx.conf contained details on 2 indexes, mybigindex and mysmallindex, you could do
the following:

$ indexer mybigindex
$ indexer mysmallindex mybigindex

As part of the configuration file, sphinx.conf, you specify one or more indexes for your
data. You might call indexer to reindex one of them, ad-hoc, or you can tell it to process
all indexes - you are not limited to calling just one, or all at once, you can always pick
some combination of the available indexes.

OPTIONS


The majority of the options for indexer are given in the configuration file, however there
are some options you might need to specify on the command line as well, as they can affect
how the indexing operation is performed. These options are:

--all
Tells indexer to update every index listed in sphinx.conf, instead of listing
individual indexes. This would be useful in small configurations, or cron-type or
maintenance jobs where the entire index set will get rebuilt each day, or week, or
whatever period is best.

Example usage:

$ indexer --config /home/myuser/sphinx.conf --all

--buildstops outfile.txt NUM
Reviews the index source, as if it were indexing the data, and produces a list of the
terms that are being indexed. In other words, it produces a list of all the searchable
terms that are becoming part of the index. Note; it does not update the index in
question, it simply processes the data 'as if' it were indexing, including running
queries defined with sql_query_pre or sql_query_post. outputfile.txt will contain the
list of words, one per line, sorted by frequency with most frequent first, and NUM
specifies the maximum number of words that will be listed; if sufficiently large to
encompass every word in the index, only that many words will be returned. Such a
dictionary list could be used for client application features around "Did you mean..."
functionality, usually in conjunction with --buildfreqs, below.

Example:

$ indexer myindex --buildstops word_freq.txt 1000

This would produce a document in the current directory, word_freq.txt with the 1,000
most common words in 'myindex', ordered by most common first. Note that the file will
pertain to the last index indexed when specified with multiple indexes or --all (i.e.
the last one listed in the configuration file)

--buildfreqs
Used in pair with --buildstops (and is ignored if --buildstops is not specified). As
--buildstops provides the list of words used within the index, --buildfreqs adds the
quantity present in the index, which would be useful in establishing whether certain
words should be considered stopwords if they are too prevalent. It will also help with
developing "Did you mean..." features where you can how much more common a given word
compared to another, similar one.

Example:

$ indexer myindex --buildstops word_freq.txt 1000 --buildfreqs

This would produce the word_freq.txt as above, however after each word would be the
number of times it occurred in the index in question.

--config CONFIGRILE, -c CONFIGFILE
Use the given file as configuration. Normally, it will look for sphinx.conf in the
installation directory (e.g./usr/local/sphinx/etc/sphinx.conf if installed into
/usr/local/sphinx), followed by the current directory you are in when calling indexer
from the shell. This is most of use in shared environments where the binary files are
installed somewhere like /usr/local/sphinx/ but you want to provide users with the
ability to make their own custom Sphinx set-ups, or if you want to run multiple
instances on a single server. In cases like those you could allow them to create their
own sphinx.conf files and pass them to indexer with this option.

For example:

$ indexer --config /home/myuser/sphinx.conf myindex

--dump-rows FILE
Dumps rows fetched by SQL source(s) into the specified file, in a MySQL compatible
syntax. Resulting dumps are the exact representation of data as received by indexer
and help to repeat indexing-time issues.

--merge DST-INDEX SRC-INDEX
Physically merge together two indexes. For example if you have a main+delta scheme,
where the main index rarely changes, but the delta index is rebuilt frequently, and
--merge would be used to combine the two. The operation moves from right to left - the
contents of SRC-INDEX get examined and physically combined with the contents of
DST-INDEX and the result is left in DST-INDEX. In pseudo-code, it might be expressed
as: DST-INDEX += SRC-INDEX

An example:

$ indexer --merge main delta --rotate

In the above example, where the main is the master, rarely modified index, and delta
is the less frequently modified one, you might use the above to call indexer to
combine the contents of the delta into the main index and rotate the indexes.

--merge-dst-range ATTR MIN MAX
Run the filter range given upon merging. Specifically, as the merge is applied to the
destination index (as part of --merge, and is ignored if --merge is not specified),
indexer will also filter the documents ending up in the destination index, and only
documents will pass through the filter given will end up in the final index. This
could be used for example, in an index where there is a 'deleted' attribute, where 0
means 'not deleted'. Such an index could be merged with:

$ indexer --merge main delta --merge-dst-range deleted 0 0

Any documents marked as deleted (value 1) would be removed from the newly-merged
destination index. It can be added several times to the command line, to add
successive filters to the merge, all of which must be met in order for a document to
become part of the final index.

--merge-killlists, --merge-klists
Used in pair with --merge. Usually when merging indexer uses kill-list of source index
(i.e., the one which is merged into) as the filter to wipe out the matching docs from
the destination index. At the same time the kill-list of the destination itself isn't
touched at all. When using --merge-killlists, (or it shorter form --merge-klists) the
indexer will not filter the dst-index docs with src-index killlist, but it will merge
their kill-lists together, so the final result index will have the kill-list
containing the merged source kill-lists.

--noprogress
Don't display progress details as they occur; instead, the final status details (such
as documents indexed, speed of indexing and so on are only reported at completion of
indexing. In instances where the script is not being run on a console (or 'tty'), this
will be on by default.

Example usage:

$ indexer --rotate --all --noprogress

--print-queries
Prints out SQL queries that indexer sends to the database, along with SQL connection
and disconnection events. That is useful to diagnose and fix problems with SQL
sources.

--quiet
Tells indexer not to output anything, unless there is an error. Again, most used for
cron-type, or other script jobs where the output is irrelevant or unnecessary, except
in the event of some kind of error.

Example usage:

$ indexer --rotate --all --quiet

--rotate
Used for rotating indexes. Unless you have the situation where you can take the search
function offline without troubling users, you will almost certainly need to keep
search running whilst indexing new documents. --rotate creates a second index,
parallel to the first (in the same place, simply including .new in the filenames).
Once complete, indexer notifies searchd via sending the SIGHUP signal, and searchd
will attempt to rename the indexes (renaming the existing ones to include .old and
renaming the .new to replace them), and then start serving from the newer files.
Depending on the setting of seamless_rotate, there may be a slight delay in being able
to search the newer indexes.

Example usage:

$ indexer --rotate --all

--sighup-each
is useful when you are rebuilding many big indexes, and want each one rotated into
searchd as soon as possible. With --sighup-each, indexer will send a SIGHUP signal to
searchd after succesfully completing the work on each index. (The default behavior is
to send a single SIGHUP after all the indexes were built.)

--verbose
Guarantees that every row that caused problems indexing (duplicate, zero, or missing
document ID; or file field IO issues; etc) will be reported. By default, this option
is off, and problem summaries may be reported instead.

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