Difference between revisions of "Tier1 Operations Report 2016-11-30"

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| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Review of Issues during the week 23rd to 30th November 2016.
 
| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Review of Issues during the week 23rd to 30th November 2016.
 
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−
* It was found that some worker nodes were being put offline owing to clock drift. This was around 10% of them on Monday). This was traced to a problem within the NTP daemon and was fixed by a configuration change.
+
* It was found that some worker nodes were being put offline owing to clock drift. (This was around 10% of them on Monday). This was traced to a problem within the NTP daemon and was fixed by a configuration change.
 
<!-- ***********End Review of Issues during last week*********** ----->
 
<!-- ***********End Review of Issues during last week*********** ----->
 
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| style="background-color: #f8d6a9; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Resolved Disk Server Issues
 
| style="background-color: #f8d6a9; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Resolved Disk Server Issues
 
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−
* GDSS750 (LHCbDst – D1T0) was taken out of service having reported 'FSProbe' problems on Sunday morning (20th Nov). The server was put back in service the following day. Two disks were replaced.
+
* None.
 
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| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Notable Changes made since the last meeting.
 
| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Notable Changes made since the last meeting.
 
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−
* Additional disk servers have been added to Castor: For Alice 5 extra servers, each 100TB. For LHCb 12 additional servers, each 120TB. This will enable both an increase in capacity and the withdrawal of some older (smaller capacity) disk servers.
+
* Maintenance was carried out on the UPS and generator in R89 yesterday.
−
* There was an intervention on the ECHO Ceph system last week to enable a reconfiguration of its underlying network.
+
* There was restart test of the ECHO Ceph system yesterday> this was to understand how best to do this and set-up appropriate operating procedures.
−
* LHCb writing to the 'D' tapes. The migration of their data from 'C' to 'D' tapes is underway - with around 200 (some 20%) of the tapes done.
+
* LHCb writing to the 'D' tapes. The migration of their data from 'C' to 'D' tapes is underway - with around 300 (some 30%) of the tapes done.
 +
* An update to the FTS3 service (to version 3.5.7) has taken place this morning.
 +
* Increased number of CMS multicore jobs allowed to run as the previous limit was a bit too low. (This is a further increase as compared to that of around a month ago).
 
<!-- *************End Notable Changes made this last week************** ----->
 
<!-- *************End Notable Changes made this last week************** ----->
 
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<!-- ******* still to be formally scheduled and/or announced ******* ----->
 
<!-- ******* still to be formally scheduled and/or announced ******* ----->
 +
'''Pending - but not yet formally announced:'''
 +
* Firmware update on Clustervision '13 disk servers. These are distributed as follows: AtlasDataDisk: 12; CMSDisk: 5; LHCbDst: 12.
 +
* Merge AtlasScratchDisk and LhcbUser into larger disk pools - Possible date Thursday 8th Dec.
 
'''Listing by category:'''
 
'''Listing by category:'''
−
* Castor:
+
* Castor:  
 
** Merge AtlasScratchDisk and LhcbUser into larger disk pools
 
** Merge AtlasScratchDisk and LhcbUser into larger disk pools
 
** Update to Castor version 2.1.15. Planning to roll out January 2017. (Proposed dates: 10th Jan: Nameserver; 17th Jan: First stager (LHCb); 24th Jan: Stager (Atlas); 26th Jan: Stager (GEN); 31st Jan: Final stager (CMS)).
 
** Update to Castor version 2.1.15. Planning to roll out January 2017. (Proposed dates: 10th Jan: Nameserver; 17th Jan: First stager (LHCb); 24th Jan: Stager (Atlas); 26th Jan: Stager (GEN); 31st Jan: Final stager (CMS)).
Line 131: Line 136:
 
! GGUS ID !! Level !! Urgency !! State !! Creation !! Last Update !! VO !! Subject
 
! GGUS ID !! Level !! Urgency !! State !! Creation !! Last Update !! VO !! Subject
 
|-
 
|-
−
| 125126
+
| 125157
−
| Green
+
−
| Urgent
+
−
| In Progress
+
−
| 2016-11-22
+
−
| 2016-11-23
+
−
| MICE
+
−
| Problems connecting to srm-mice.gridpp.rl.ac.uk
+
−
|-
+
−
| 125116
+
 
| Green
 
| Green
 
| Less Urgent
 
| Less Urgent
−
| In Progress
+
| Waiting for Reply
−
| 2016-11-21
+
| 2016-11-24
−
| 2016-11-23
+
| 2016-11-29
−
| SNO+
+
|  
−
| DNS configuration problem
+
| Creation of a repository within the EGI CVMFS infrastructure
 
|-
 
|-
 
| 124876
 
| 124876
Line 157: Line 153:
 
| OPS
 
| OPS
 
| [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk
 
| [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk
−
|-
 
−
| 124785
 
−
| Red
 
−
| Urgent
 
−
| Reopened
 
−
| 2016-11-02
 
−
| 2016-11-09
 
−
| CMS
 
−
| Configuration updated AAA - CMS Site Name missing
 
 
|-
 
|-
 
| 124606
 
| 124606
Line 172: Line 159:
 
| In Progress
 
| In Progress
 
| 2016-10-24
 
| 2016-10-24
−
| 2016-11-01
+
| 2016-11-24
 
| CMS
 
| CMS
 
| Consistency Check for T1_UK_RAL
 
| Consistency Check for T1_UK_RAL
 
|-
 
|-
−
| 124487
+
| 124478
 
| Green
 
| Green
 
| Less Urgent
 
| Less Urgent
−
| Waiting for Reply
+
| In Progress
 
| 2016-11-18
 
| 2016-11-18
 
| 2016-11-18
 
| 2016-11-18
Line 219: Line 206:
 
! Day !! OPS !! Alice !! Atlas !! CMS !! LHCb !! Atlas HC !! CMS HC !! Comment
 
! Day !! OPS !! Alice !! Atlas !! CMS !! LHCb !! Atlas HC !! CMS HC !! Comment
 
|-
 
|-
−
| 23/11/16 || 100 || 100 || 100 || 100 || 100 || N/A || 100 ||
+
| 23/11/16 || 100 || 100 || 100 || 100 || 100 || 100 || 100 ||
 
|-
 
|-
−
| 24/11/16 || 100 || 100 || 100 || 100 || 100 || N/A || 100 ||
+
| 24/11/16 || 100 || 100 || 100 || 100 || 100 || 98 || 100 ||
 
|-
 
|-
−
| 25/11/16 || 100 || 100 || 100 || 100 || 100 || N/A || 100 ||
+
| 25/11/16 || 100 || 100 || 100 || 100 || 100 || 100 || 100 ||
 
|-
 
|-
−
| 26/11/16 || 100 || 100 || 100 || style="background-color: lightgrey;" | 98 || 100 || N/A || 98 || Two SRM 'GET' test failures. Both user timeout error
+
| 26/11/16 || 100 || 100 || 100 || style="background-color: lightgrey;" | 98 || 100 || 100 || 98 || Two SRM 'GET' test failures. Both user timeout error
 
|-
 
|-
−
| 27/11/16 || 100 || 100 || 100 || 100 || 100 || N/A || 100 ||
+
| 27/11/16 || 100 || 100 || 100 || 100 || 100 || 100 || 100 ||
 
|-
 
|-
−
| 28/11/16 || 100 || 100 || 100 || 100 || 100 || N/A || 98 ||
+
| 28/11/16 || 100 || 100 || 100 || 100 || 100 || 100 || 98 ||
 
|-
 
|-
−
| 29/11/16 || style="background-color: lightgrey;" | 96.5 || 100 || 100 || 100 || 100 || N/A || 99 || Central monitoring problem affected other sites too.
+
| 29/11/16 || style="background-color: lightgrey;" | 96.5 || 100 || 100 || 100 || 100 || 100 || 99 || Central monitoring problem affected other sites too.
 
|}
 
|}
 
<!-- **********************End Availability Report************************** ----->
 
<!-- **********************End Availability Report************************** ----->
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| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Notes from Meeting.
 
| style="background-color: #b7f1ce; border-bottom: 1px solid silver; text-align: center; font-size: 1em; font-weight: bold; margin-top: 0; margin-bottom: 0; padding-top: 0.1em; padding-bottom: 0.1em;" | Notes from Meeting.
 
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|}
−
* Some work is needed in the Castor configuration to separate the storage of the files from the different Dirac sites (Durham, Leicester etc.).
+
* The number of CMS multicore jobs we are running has been slightly increased. We are seeing some low job efficiencies (around 30% yesterday - up to around 55% today). Cause not understood. Also looks like two disk servers in CMSDisk are under particular load. We will chase up which files on these servers are being accessed.
 +
* MICE_ There is a data taking until mid-December. There is an outstanding need to standardise the ownership of MICE files in Castor. Initially some writes were done under a particular user's ID. MICE will provide a list of files to correct/fix.
 +
* Dirac: We expect around 700TB of data from each site. Ongoing work needed in the Catsor configuration to ensure separation of the files from the different Dirac sites.

Latest revision as of 14:23, 30 November 2016

RAL Tier1 Operations Report for 30th November 2016

Review of Issues during the week 23rd to 30th November 2016.
  • It was found that some worker nodes were being put offline owing to clock drift. (This was around 10% of them on Monday). This was traced to a problem within the NTP daemon and was fixed by a configuration change.
Resolved Disk Server Issues
  • None.
Current operational status and issues
  • There is a problem seen by LHCb of a low but persistent rate of failure when copying the results of batch jobs to Castor. There is also a further problem that sometimes occurs when these (failed) writes are attempted to storage at other sites.
  • The intermittent, low-level, load-related packet loss that has been seen over external connections is still being tracked. The replacement of the UKLight router appears to have reduced this - but we are allowing more time to pass before drawing any conclusions.
Ongoing Disk Server Issues
  • None
Notable Changes made since the last meeting.
  • Maintenance was carried out on the UPS and generator in R89 yesterday.
  • There was restart test of the ECHO Ceph system yesterday> this was to understand how best to do this and set-up appropriate operating procedures.
  • LHCb writing to the 'D' tapes. The migration of their data from 'C' to 'D' tapes is underway - with around 300 (some 30%) of the tapes done.
  • An update to the FTS3 service (to version 3.5.7) has taken place this morning.
  • Increased number of CMS multicore jobs allowed to run as the previous limit was a bit too low. (This is a further increase as compared to that of around a month ago).
Declared in the GOC DB

None

Advanced warning for other interventions
The following items are being discussed and are still to be formally scheduled and announced.

Pending - but not yet formally announced:

  • Firmware update on Clustervision '13 disk servers. These are distributed as follows: AtlasDataDisk: 12; CMSDisk: 5; LHCbDst: 12.
  • Merge AtlasScratchDisk and LhcbUser into larger disk pools - Possible date Thursday 8th Dec.

Listing by category:

  • Castor:
    • Merge AtlasScratchDisk and LhcbUser into larger disk pools
    • Update to Castor version 2.1.15. Planning to roll out January 2017. (Proposed dates: 10th Jan: Nameserver; 17th Jan: First stager (LHCb); 24th Jan: Stager (Atlas); 26th Jan: Stager (GEN); 31st Jan: Final stager (CMS)).
    • Update SRMs to new version, including updating to SL6. This will be done after the Castor 2.1.15 update.
  • Fabric
    • Firmware updates on older disk servers.
Entries in GOC DB starting since the last report.
Service Scheduled? Outage/At Risk Start End Duration Reason
lcgfts3.gridpp.rl.ac.uk, SCHEDULED WARNING 30/11/2016 11:00 30/11/2016 13:00 2 hours Upgrade of FTS3 service
Open GGUS Tickets (Snapshot during morning of meeting)
GGUS ID Level Urgency State Creation Last Update VO Subject
125157 Green Less Urgent Waiting for Reply 2016-11-24 2016-11-29 Creation of a repository within the EGI CVMFS infrastructure
124876 Green Less Urgent On Hold 2016-11-07 2016-11-21 OPS [Rod Dashboard] Issue detected : hr.srce.GridFTP-Transfer-ops@gridftp.echo.stfc.ac.uk
124606 Red Top Priority In Progress 2016-10-24 2016-11-24 CMS Consistency Check for T1_UK_RAL
124478 Green Less Urgent In Progress 2016-11-18 2016-11-18 Jobs submitted via RAL WMS stuck in state READY forever and ever and ever
122827 Green Less Urgent In Progress 2016-07-12 2016-10-11 SNO+ Disk area at RAL
117683 Red Less Urgent On Hold 2015-11-18 2016-10-05 CASTOR at RAL not publishing GLUE 2 (Updated. There are ongoing discussions with GLUE & WLCG)
Availability Report

Key: Atlas HC = Atlas HammerCloud (Queue ANALY_RAL_SL6, Template 808); CMS HC = CMS HammerCloud

Day OPS Alice Atlas CMS LHCb Atlas HC CMS HC Comment
23/11/16 100 100 100 100 100 100 100
24/11/16 100 100 100 100 100 98 100
25/11/16 100 100 100 100 100 100 100
26/11/16 100 100 100 98 100 100 98 Two SRM 'GET' test failures. Both user timeout error
27/11/16 100 100 100 100 100 100 100
28/11/16 100 100 100 100 100 100 98
29/11/16 96.5 100 100 100 100 100 99 Central monitoring problem affected other sites too.
Notes from Meeting.
  • The number of CMS multicore jobs we are running has been slightly increased. We are seeing some low job efficiencies (around 30% yesterday - up to around 55% today). Cause not understood. Also looks like two disk servers in CMSDisk are under particular load. We will chase up which files on these servers are being accessed.
  • MICE_ There is a data taking until mid-December. There is an outstanding need to standardise the ownership of MICE files in Castor. Initially some writes were done under a particular user's ID. MICE will provide a list of files to correct/fix.
  • Dirac: We expect around 700TB of data from each site. Ongoing work needed in the Catsor configuration to ensure separation of the files from the different Dirac sites.
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