Tier1 Operations Report 2018-10-02
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RAL Tier1 Operations Report for 2 October 2018
Review of Issues during the week 24th September 2018 to the 2nd October 2018. |
- The on-going LFC issue appeared to have been resolved around the 26th and as such the service was returned to Production.
- First breakage of database = 19th August Fixed 21st September Second breakage of database = Tuesday 25th September 1pm.
- At the moment we believe there is reasonable confidence that LFC issues were understood and there is a fix:
- thanks to Fabrizio Furano (former LFC code developer at CERN) we have identified a flaw in the Oracle to MySQL migration process
- an Oracle SEQUENCE had not been migrated into a MySQL table) therefore only about 6820 new records were possible to be registered in the new MYSQL backend each time before a crash
- this is explanation for the 'Fun Fact' and it happened twice)
- Fabrizio provided a simple solution to fix the problem and several people at RAL agreed on Friday with this solution
Current operational status and issues |
- Tier-1 encountered another IPv6 issue 17/9/18 - 23:00), however Digital Solutions were able to resolve this issue within 2 hours
Resolved Castor Disk Server Issues |
Machine | VO | DiskPool | dxtx | Comments |
---|---|---|---|---|
- | - | - | - | - |
Ongoing Castor Disk Server Issues |
Machine | VO | DiskPool | dxtx | Comments |
---|---|---|---|---|
gdss747 | Atlas | atlasStripInput | d1t0 | Currently in intervention. |
gdss753 | Atlas | atlasStripInput | d1t0 | Currently in intervention. |
Limits on concurrent batch system jobs. |
- GROUP_CMS_LIMIT = 4000
- GROUP_ATLAS_LIMIT = 8000
Notable Changes made since the last meeting. |
- None.
Entries in GOC DB starting since the last report. |
Service | ID | Scheduled? | Outage/At Risk | Start | End | Duration | Reason |
---|---|---|---|---|---|---|---|
LFC | 26064 | No | Outage | 20-Sep-18 17:00:00 | 24-Sep-18 11:00:02 | - | investigating problems with the LFC - possibly in the back end database. |
Declared in the GOC DB |
Service | ID | Scheduled? | Outage/At Risk | Start | End | Duration | Reason |
---|---|---|---|---|---|---|---|
- | - | - | - | - | - | - | - |
- No ongoing downtime
- No downtime scheduled in the GOCDB for next 2 weeks
Advanced warning for other interventions |
The following items are being discussed and are still to be formally scheduled and announced. |
Listing by category:
- Castor:
- Update systems to use SL7 and configured by Quattor/Aquilon. (Tape servers done)
- Move to generic Castor headnodes.
- Internal
- DNS servers will be rolled out within the Tier1 network.
Open
GGUS Tickets (Snapshot taken during morning of the meeting). |
Request id | Affected vo | Status | Priority | Date of creation | Last update | Type of problem | Subject | Scope |
---|---|---|---|---|---|---|---|---|
137398 | cms | in progress | urgent | 26/09/2018 | 26/09/2018 | CMS_Data Transfers | Transfers failing from SPRACE to RAL - No data available | WLCG |
137391 | atlas | in progress | urgent | 25/09/2018 | 26/09/2018 | Network problem | UK RAL-LCG2 transfer errors with Communication error on send | WLCG |
137254 | ops | in progress | less urgent | 18/09/2018 | 25/09/2018 | Operations | [Rod Dashboard] Issue detected : ch.cern.LFC-Write-ops@lfc.gridpp.rl.ac.uk | EGI |
137195 | ops | in progress | less urgent | 14/09/2018 | 24/09/2018 | Operations | [Rod Dashboard] Issues detected at RAL-LCG2 | EGI |
137153 | t2k.org | in progress | urgent | 12/09/2018 | 25/09/2018 | Data Management - generic | LFC entry has file size 0, preventsw registering of additional replicas | EGI |
136840 | snoplus.snolab.ca | in progress | very urgent | 23/08/2018 | 25/09/2018 | Other | Cannot upload files to LFN from Storage node | EGI |
136701 | lhcb | waiting for reply | very urgent | 14/08/2018 | 26/09/2018 | File Transfer | background of transfer errors | WLCG |
136199 | lhcb | in progress | very urgent | 18/07/2018 | 07/08/2018 | File Transfer | Lots of submitted transfers on RAL FTS | WLCG |
136028 | cms | in progress | top priority | 10/07/2018 | 21/09/2018 | CMS_AAA WAN Access | Issues reading files at T1_UK_RAL_Disk | WLCG |
124876 | ops | in progress | less urgent | 07/11/2016 | 23/07/2018 | Operations | [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk | EGI |
GGUS Tickets Closed Last week |
Request id | Affected vo | Status | Priority | Date of creation | Last update | Type of problem | Subject | Scope |
---|---|---|---|---|---|---|---|---|
137294 | snoplus.snolab.ca | solved | very urgent | 20/09/2018 | 21/09/2018 | File Access | No copy on tape error on Castor at RAL | EGI |
137267 | atlas | solved | urgent | 19/09/2018 | 19/09/2018 | Other | RAL-LCG2 transfer fail with "Communication error on send" | WLCG |
137151 | t2k.org | solved | urgent | 12/09/2018 | 24/09/2018 | File Transfer | Cannot upload files to grid an register replica | EGI |
137136 | lhcb | verified | very urgent | 12/09/2018 | 18/09/2018 | File Access | Data transfers problem at RAL-LCG2 | WLCG |
137047 | t2k.org | solved | less urgent | 06/09/2018 | 20/09/2018 | File Access | Connection to RAL tape storage fails | EGI |
136967 | cms | closed | urgent | 31/08/2018 | 18/09/2018 | CMS_Data Transfers | Phedex transfers failing from RAL to FNAL | WLCG |
136942 | t2k.org | closed | less urgent | 29/08/2018 | 20/09/2018 | File Transfer | Copying ONLINE_AND_NEARLINE files from RAL tape storage times out | EGI |
136884 | t2k.org | solved | top priority | 27/08/2018 | 24/09/2018 | Data Management - generic | lcg-cr not working for t2k vo | EGI |
Availability Report |
Day | Atlas | Atlas-Echo | CMS | LHCB | Alice | OPS | Comments |
---|---|---|---|---|---|---|---|
2018-09-17 | 100 | 100 | 96 | 100 | 100 | 100 | |
2018-09-18 | 100 | 100 | 100 | 100 | 100 | 100 | |
2018-09-19 | 100 | 100 | 100 | 100 | 100 | 100 | |
2018-09-20 | 100 | 100 | 100 | 100 | 100 | 100 | |
2018-09-21 | 100 | 100 | 97 | 100 | 100 | 100 | |
2018-09-22 | 100 | 100 | 96 | 100 | 100 | 100 | |
2018-09-23 | 100 | 100 | 100 | 100 | 100 | 100 | |
2018-09-24 | 100 | 100 | 100 | 100 | 100 | 100 |
Hammercloud Test Report |
Target Availability for each site is 97.0% | Red <90% | Orange <97% |
Day | Atlas HC | CMS HC | Comment |
---|---|---|---|
2018-08-10 | 100 | 98 | |
2018-08-11 | 100 | 98 | |
2018-08-12 | 98 | 99 | |
2018-08-13 | 95 | 98 | |
2018-08-14 | 100 | 99 | |
2018-08-15 | 79 | 99 | |
2018-08-16 | 100 | 99 | |
2018-08-17 | - | - |
Key: Atlas HC = Atlas HammerCloud (Queue RAL-LCG2_UCORE, Template 841); CMS HC = CMS HammerCloud
Notes from Meeting. |