Table of Contents
dCache Tier I meeting March 14, 2017
[part of a series of meetings]
Present
dCache.org(Paul), IN2P3(), Sara(), Triumf(), BNL(), NDGF(Ulf), PIC(Marc), KIT(Xavier), Fermi(), CERN()
Agenda
(see box on the other side)
Site reports
KIT
dCache is running just fine for the last month.
SQL scripts
Paul to remind Tigran when he's back from NFS meeting.
pools repo 600 TiB
PIC has 380 TiB pools (with 3.3x106 files), with XFS.
Need to tune the je properties (for the BerkeleyDB) to boost the startup time. These used to need 4 hours; now less than 30 minutes. Also "btree memory for java" Java max heap size to keep btree
NDGF's largest pools are 100 TiB.
Modern dCache pools for start-up is much less ~10.
Paul pointed out that these are tunable via the pool.plugins.meta.db! properties
Marc shared PIC notes on this topic:
http://pwiki.pic.es/index.php/DCACHE_CHECK_POOL_METADATA
plugin
Paul advised on how to do logging.
Tape migration
RT 9147
Paul to chase up Tigran about this information.
NDGF
Quite nice.
Updated to 3.0.10 last week, directly after released.
All the problems with the ZooKeeper? are fixed: no extra errors now.
We haven't been able to reboot
pool startup found problems
Seems that v3.0.10 better at scanning files files that have been uploaded in December with zero byte size.
370,000 zero-byte files uploaded by Alice. They have messed up when uploading from Japan.
PIC
Upgrade to 2.16. One issue
Upgrade problems
RT 9153
pinv3 table was unable to drop it.
Four tickets in the last two week.
RT 9150 multiple restore requests
Support tickets for discussion
[Items are added here automagically]
DTNM
Proposed: same time, next week.