Lower Storage projects Alexander Moibenko 02/19/2003

Enstore Fermilab Mass Storage System ● General Mass Storage ● D0 Mass Storage ● CDF Mass Storage

Hardware ● 3 STK Robotic Storage Libraries ● 1 AML-2 Robotic Storage Librarie ● A Tape Drives ● B Tape Drives ● 9 IBM LTO Tape Drives ● Tape drives ● 4 Mammoth-2 tape drives

Developers ● Eileen Berman ● Chih-Hao Huang ● Alexander Moibenko ● Michael Zalokar

Hardware (cont-d) ● 53 mover nodes ● 18 server nodes

Software components ● Linux OS for servers and movers ● Pyhton as main language ● C where needed performance ● ftt as low level tape tool ● libdb as internal DB ● postgres as accounting DB ● apache web server

Software (cont-d) ● Freeware plot tools ● Freeware Imaging tools ● Custom system monitoring ● Custom system installation / upgrade tools ● No licensed products. ● Client code for Linux, IRIX, SunOS, OSF1

Data Storage Infrastructure user Robotic Library DCache Enstore

Enstore Structure (major comp-s) User pnfs File clerk Volume clerk Library mgr. mover

Enstore Structure (addl. Comp) ● Inquisitor ● alarm server ● event relay ● accounting server

Project Status ● All components in production. Need feature additions, bug fixes. ● Movers run with the rate of tape drive ● More than 600 TB of data stored ● More than 8 TB/day average transfer ● Major development: accounting module, enstore data presentation, migration of tape drive statistics off central DB ● New storage resources