RAL Tier1 weekly operations castor 24/06/2016
Contents
Minutes from the previous meeting
Operation problems
Hot SRM for gen aminly due to t2k transfers
Tape library problems occured again early this week. There was an instability with the ACSLS software last night. Tim will put a new machine running ACSLS today
DB resources exhaustion issues. Around 15 June there were about twice as much writes to the primary database causing ca. 20 min of writes to standby database Need to keep track of DB activity over the next weeks
Long-term projects
RA did some debugging work on 2.1.15 in CERN and he found out that the SRM problem is not trivial. He will be in touch with Giusepe about this.
CASTOR will be replaced in CERN by 2022. Need to consider what will happen in RAL
Staffing
RA on annual leave during next week
BD in a meeting from Mon to Thu
CP/BD will attend the Data Intensive workshop on Mon
CP on call next week
Actions
CP to request final confirmation from Diamond and do test recalls on the zero-sized files
RA to update the doc for xroot certificates
GP to ask Jens about the pending membership request to dteam VO
GP to review mailing lists he is on
GP and BD to perform stress testing of gdss596 to evaluate the new WAN parameters
GP to arrange a meeting with Bruno about the aquilon migration and the SL7 upgrade
RA SRM DB duplicates removal script is under testing
Completed actions
BD to review outstanding RT tickets on CASTOR queue
GP access GOCDB
Operation news
DB load has eased off but we still don’t understand the root cause of previous load yet
The tape library has been stable for ~40h
Operation problems
multi disk failure on disk array serving standby Neptune DB – now recovered by fabric / Andrey
gdss743 failed and went out of production but now operational.
gdss 748 suffered from RAID and motherboard hardware failure. Its data disks have been put into the chassis of gdss755 (preprod) and the server renamed to 748. Currently running as RO (atlas can delete still). The meeting took the decision to start draining 748 disks on Monday 27/6. Fabric have been informed.
Brian notes that GenScratch – still has data on it (being decommissioned and is not accessible)
DB load has eased off but we still don’t understand the root cause of previous load yet
Persistent data (for daily test) is still on GenScratch - need to discuss what to do with it
Long-term projects
RA did some debugging work on 2.1.15 in CERN and he found out that the SRM problem is not trivial. He will be in touch with Giusepe about this.
CASTOR will be replaced in CERN by 2022. Need to consider what will happen in RAL
Stafing
Chris possibly out Tuesday, otherwise all here
RA on call -tbc
Actions
GP/RA make sure we start to drain 748
CASTOR TEAM Durham / Leicester Dirac data - need to create separate tape pools / uid / gid
RA disks servers requiring RAID update - locate servers and plan for update with fabric
RA decide what to do with persistent data (for daily test) is still on GenScratch
RA to update the doc for xroot certificates
GP to review mailing lists he is on
GP and BD to perform stress testing of gdss596 to evaluate the new WAN parameters
RA SRM DB duplicates removal script is under testing
Completed actions
CP to request final confirmation from Diamond and do test recalls on the zero-sized files
GP to ask Jens about the pending membership request to dteam VO
GP to arrange a meeting with Bruno about the aquilon migration and the SL7 upgrade
