Lower Storage projects Alexander Moibenko 02/19/2003.
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Lower Storage projects Alexander Moibenko 02/19/2003
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Transcript of Lower Storage projects Alexander Moibenko 02/19/2003.
Lower Storage projectsAlexander 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● 27 9940A Tape Drives● 12 9940B Tape Drives● 9 IBM LTO Tape Drives● 6 9840 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
pnfsFile 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
