Re-Indexing is required only for SNMP/Script Data Queries. Remember, that whan applying a Data Query to a Host, a Re-Index Method has to be chosen. This reindex method governs the automatic re-indexing based on specific events.
Table 20-1. Re_Index Methods
| Re-Index Method | Description |
|---|---|
| Uptime Goes Backwards | Refers to a system reboot. Cacti will detect if the target has been rebootet by querying sysUptime (.1.3.6.1.2.1.1.3.0). If the current value for the uptime is lower than the previous one (uptime goes backwards), a reboot is assumed and a re-index is performed |
| Index Count Changed | Refers to a change of the number of indexed items, e.g. interfaces, without checking sysUptime. It is of particular interest in cases, where indexed entries may change without the need of a reboot. As modern operating systems seldom require reboots for system configuration changes, you may want to consider this setting for many cases (e.g. creating of a new filesystem without a reboot). The index to be considered is defined by the according XML file. |
| Verify All Fields | All index fields of the according XML file are checked for changes. This is of particular interest e.g. in cases, where the index is non-numeric (e.g. a MAC address). |
If you feel the need for manual re-indexing, you may run it from cli. Calling the script with the parameter --help yields
shell>php -q poller_reindex_hosts.php --help
Cacti Reindex Host Script 1.2, Copyright 2004-2013 - The Cacti Group
usage: poller_reindex_hosts.php --id=[host_id|All] [--qid=[ID|All]] [--host-descr=[description]]
[-d] [-h] [--help] [-v] [--version]
--id=host_id - The host_id to have data queries reindexed or 'All' to reindex all hosts
--qid=query_id - Only index on a specific data query id; defaults to 'All'
--host-descr=description - The host description to filter by (SQL filters acknowledged)
--debug - Display verbose output during execution
-v --version - Display this help message
-h --help - Display this help messageRunning it in debug mode for the host with id=2 may yield
shell>php -q poller_reindex_hosts.php -id=2 -d WARNING: Do not interrupt this script. Reindexing can take quite some time DEBUG: There are '1' data queries to run DEBUG: Data query number '1' host: '2' SNMP Query Id: '1' starting DEBUG: Data query number '1' host: '2' SNMP Query Id: '1' ending
A silent run for all devices is issued by
shell>php -q poller_reindex_hosts.php -id=All WARNING: Do not interrupt this script. Reindexing can take quite some time .....shell>
You may run this script against a specific data query id using --qid=[data query id] like
shell>php -q poller_reindex_hosts.php --id=All --qid=1 -d WARNING: Do not interrupt this script. Reindexing can take quite some time DEBUG: There are '3' data queries to run DEBUG: Data query number '1' host: '1' SNMP Query Id: '1' starting DEBUG: Data query number '1' host: '1' SNMP Query Id: '1' ending DEBUG: Data query number '2' host: '2' SNMP Query Id: '1' starting DEBUG: Data query number '2' host: '2' SNMP Query Id: '1' ending DEBUG: Data query number '3' host: '15' SNMP Query Id: '1' starting DEBUG: Data query number '3' host: '15' SNMP Query Id: '1' ending
It is possible, to select a host based on its host description using --host-descr=[host description]. It is allowed to apply an SQL filter expression for the description like --qid=some%descr. Use this parameter in conjunction with either --id=[host id] or --qid=[data query id] or both:
shell>php -q poller_reindex_hosts.php --id=All --qid=1 --host-descr=ga%f -d WARNING: Do not interrupt this script. Reindexing can take quite some time DEBUG: There are '1' data queries to run DEBUG: Data query number '1' host: '2' SNMP Query Id: '1' starting DEBUG: Data query number '1' host: '2' SNMP Query Id: '1' ending
| Stop the Poller during Re-Indexing |
Re-Indexing interferes with the poller operation. Please make sure, that the poller is not running and will not start during a reindex operation |