Custom Track Storage

Users can add their own tracks to the genome browser. The new system for doing this is called "track hubs", these are stored on any webserver. The older system for adding tracks is called "custom tracks" where the data is stored at UCSC, in the directory "trash/ct".

• sessions with custom tracks have an entry "ctfile_<db>" for every database with at least one custom track in the cart, e.g. "ctfile_hg19". An example file name is "ctfile_hg19 ../trash/ct/ct_hgwdev_1e21a_910820.bed"
• the ctfile has one line per custom track. Each line starts with "track". It contains a list of key-value entries.
• the entries contain at least these keys:
  • dbTrackType
  • dbTableName
  • db
• special case: for named sessions, the ctfile files are moved to /userdata/ct/rr at some point

• • remember that you can use /cgi-bin/cartDump to show the cart
• each session (=hgsid) has a list of key=value entries that are called the "cart"
• the session carts are stored in the "session" table in hgcentral