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Information on Session Table
In order to process incoming data, Indexer needs reading access to the file systems or folders to be ingested.
In case of carrier based volumes like floppy disks, optical disks or hard drives, you are expected to create forensically correct sector images from the physical volumes first using ddrescue or similar tools.
These images then are made available in read-only mode by the indexer using the mount-command defined in mount. (The file system type is irrelevant, as long as it is supported by Linux.)
The disk images are mounted to a temporary mount point (folder) specified as mountpoint.
It is also possible to work on an incoming folder without mounting a sector image first; in this case simply provide the ingest folder both as datapath and leave mount and mountpoint empty.
Incoming volumes or folders are called “Sessions” by the indexer. All basic information about the sessions will be held in the “session table” with the following contents.
This unique collection ID is for multi tenancy. You can add as many multiple tenants as you need for your Indexer projects.
The indexer needs a unique “session ID” for every incoming volume or data package. Most Indexer scripts take a sessionid as an argument to work on.
If you already have a numbering or naming scheme for your volumes, you can name them here.
The full qualified path (including absolute folder hierarchy, filename and extension) of a sector image to be mounted or the full qualified path of an incoming folder to work on.
The localpath is an internal base path where the indexer-software caches a copy of all incoming data using an artificial name. It includes the bestandid and the group.
Temporary mount point for sector images (like /mnt) or empty in case of a file based ingest.
The column mount represents the complete command line for mounting an image, including any options. Placeholders $$IMAGE$$ and $$MOUNTPOINT$$ can be used for the content of datapath and mountpoint. If no image must be mounted, leave this field blank.
The umount column represents the complete command line for unmounting an image, including any options. The placeholder $$MOUNTPOINT$$ can be used for the content of mountpoint. If no image must be mounted and unmounted, leave this field blank.
This column represents the character set of the incoming filesystem.
This is an optional column for further describing your volumes.
In the group column you additionally specify the class of the volume to build large groups like “fd” for floppy disks, “od” for optical disks or “hd” for hard drives. Most Indexer scripts which take a sessionid as an argument also accept a group name to work on a set of sessions/volumes.
Points to the solrcore.
Indicates the time at which the session’s metadata was transferred into SOLR. Leave NULL for newly defined sessions.
Indicates the time when the volume was successfully ingested into the file table with recurse.php. Leave NULL for newly defined sessions.
You can exclude volumes from being processed by entering a “1” into the ignore column. Useful for bad volumes which cannot be mounted successfully.
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