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D0 Taking Stock 06/2005 - 06/2006

D0 Taking Stock 06/2005 - 06/2006. Calibration Database Servers Stephen P. White. Overview. Successfully running during the last calendar year No major problems have arisen Mature product with low maintenance requirements 10 different types of Calibration dbservers currently running.

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D0 Taking Stock 06/2005 - 06/2006

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  1. D0 Taking Stock 06/2005 - 06/2006 Calibration Database Servers Stephen P. White

  2. Overview • Successfully running during the last calendar year • No major problems have arisen • Mature product with low maintenance requirements • 10 different types of Calibration dbservers currently running

  3. Farm DbServers • Farms can support up to 950 processes • New data is being produced with D0reco 20.03.00 • Some old runs are still using 17.06.xx • Compute power is expected to remain roughly the same. • Older nodes may be replaced but additional nodes are not expected, though desired by D0.

  4. Hardware • Production nodes • Two nodes, with servers divided for farms/users • Dual 1.5 GHZ AMD Athlon w/2 GB Memory • Failover nodes • Two nodes, one serving each production node • 1, Dual 1.5 GHZ AMD Athlon w/2 GB Memory (farms) • 1, Dual 1.0 GHZ Pentium III w/1 GB Memory (users) • Machines Aging • Purchased: 08/02/02 • Original D0dbsrv5 has been replaced. Except for the disk the hardware has been replaced. • Should the hardware be upgraded or continue through the life of the experiment? • Hardware is supporting current loads. No load increase is expected. • Contingency plan is to add new nodes and servers.

  5. Concerns & Plans • Multi-Run Data Sets • For each distinct run the client will request an entire calibration set. • Db servers may face difficulties trying to handle diverse multi-run sets of events from multiple users. • Possible solutions: • Double the size of the cache from ~20 runs to ~40runs • May require additional Linux boxes. • Add additional Linux boxes with large cache servers. Develop a load manager for distribution of requests. • Maintenance & Support • No requests by D0 for any upgrades. • The following should be upgraded: • omniOrb to v4_0_7 – currently at v3_0_5. • Python 2.1 to 2.4 – when SAM does. • Python_dcoracle to cx_Oracle – when SAM does. • Zope no longer supports DCOracle. • Currently running v8_1_7 Oracle client to v10 Oracle server. • Continue providing support for remote sites.

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