1. Lower Storage projects Alexander Moibenko 02/19/2003

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

3. Hardware ● 3 STK Robotic Storage Libraries ● 1 AML-2 Robotic Storage Librarie ● 27 9940A Tape Drives ● 12 9940B Tape Drives ● 9 IBM LTO Tape Drives ● 6 9840 Tape drives ● 4 Mammoth-2 tape drives

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

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

6. 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

7. 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

8. Data Storage Infrastructure user Robotic Library DCache Enstore

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

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

11. 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