Difference between revisions of "Tier1 Operations Report 2018-08-20"
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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;" | Limits on concurrent batch system jobs. | | 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;" | Limits on concurrent batch system jobs. | ||
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| − | GROUP_CMS_LIMIT = 4000 | + | * GROUP_CMS_LIMIT = 4000 |
| − | GROUP_ATLAS_LIMIT = 8000 | + | * GROUP_ATLAS_LIMIT = 8000 |
<!-- ******************End Limits On Batch System Jobs***************** -----> | <!-- ******************End Limits On Batch System Jobs***************** -----> | ||
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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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| − | * | + | * The recent problems with Echo were discussed. A summary is also in the Operations report. Several points: |
| + | * Current situation is that we have “production” access running | ||
| + | * Atlas and CMS have upper limits on batch jobs about equal to pledge. | ||
| + | * The additional memory for the Dell storage nodes has arrived. This will be added – at least initially in a rolling upgrade. However, it is expected this may take up to something like 2 weeks. (At which point we expect to be able to give full access to Echo). Discussions on the best way to do the memory upgrades is ongoing. | ||
| + | * Before the problem we had noted that the LHCb files came from Castor in a “bursty” way. It was suggested last week that we limit the FTS to smooth out this burstiness. | ||
| + | * When discussing GGUS tickets: LHCb are seeing some file transfer failures between worker nodes and Castor. This to be escalated. | ||
| + | * The requirement for us to be able to easily contact all users of Echo in the event of a problem was noted. | ||
Latest revision as of 13:24, 22 August 2018
RAL Tier1 Operations Report for 20th August 2018
| Review of Issues during the week 13th August to the 20th August 2018. |
- The upgrade of Echo was completed successfully on Thursday (16/8/18), with a greatly reduced memory usage. The cluster was allowed to recover overnight. Everything appeared to be working well on the Friday (17/8/18), and there is currently no evidence of data loss. We therefore ended the downtime at Friday 12:00 UTC (17/8/18). As a precaution for the weekend, we limited the ATLAS (and CMS), quota on our batch farm to 50% of its nominal amount. Assuming we encounter no problems we intend to lift this on Monday (20/8/18).
| Current operational status and issues |
- The new siny O2 SIM for the SMS service has been delivered and installed
| 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. |
| 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 |
|---|---|---|---|---|---|---|---|
| - | - | - | - | - | - | - | - |
| 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 |
|---|---|---|---|---|---|---|---|---|
| 136757 | mice | in progress | less urgent | 17/08/2018 | 21/08/2018 | Other | Missing lsc files for mice VO on lfc.gridpp.rl.ac.uk ? | EGI |
| 136701 | lhcb | in progress | very urgent | 14/08/2018 | 21/08/2018 | File Transfer | background of transfer errors | WLCG |
| 136366 | mice | in progress | less urgent | 25/07/2018 | 20/08/2018 | Local Batch System | Remove MICE Queue from RAL T1 Batch | EGI |
| 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 | 21/08/2018 | 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 |
|---|---|---|---|---|---|---|---|---|
| 136655 | lhcb | verified | less urgent | 10/08/2018 | 15/08/2018 | File Access | Missing File At RAL | WLCG |
| 136460 | cms | closed | urgent | 30/07/2018 | 15/08/2018 | CMS_Data Transfers | Transfers failing to RAL_Buffer | WLCG |
| 136427 | atlas | closed | urgent | 28/07/2018 | 13/08/2018 | File Transfer | UK RAL-LCG2: Transfer errors as destination | WLCG |
| 136408 | cms | closed | urgent | 27/07/2018 | 15/08/2018 | CMS_Data Transfers | missing files at RAL | WLCG |
|
Availability Report |
| Target Availability for each site is 97.0% | Red <90% | Orange <97% |
| Day | Atlas | Atlas-Echo | CMS | LHCB | Alice | OPS | Comments |
|---|---|---|---|---|---|---|---|
| 2018-08-13 | 100 | 100 | 0 | 100 | 100 | 100 | |
| 2018-08-14 | 100 | 100 | 0 | 100 | 100 | 100 | |
| 2018-08-15 | 100 | 100 | 0 | 100 | 100 | 100 | |
| 2018-08-16 | 100 | 100 | 0 | 100 | 100 | 100 | |
| 2018-08-17 | 100 | 100 | 60 | 100 | 100 | 100 | |
| 2018-08-18 | 100 | 100 | 100 | 100 | 100 | 100 | |
| 2018-08-19 | 100 | 100 | 100 | 100 | 100 | 100 | |
| 2018-08-20 | 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 |
|---|---|---|---|
| 2018-08-13 | 0 | 0 | |
| 2018-08-14 | 0 | 0 | |
| 2018-08-15 | 0 | 0 | |
| 2018-08-16 | 0 | 0 | |
| 2018-08-17 | 76 | 60 | |
| 2018-08-18 | 100 | 100 | |
| 2018-08-19 | 100 | 100 | |
| 2018-08-20 | 100 | 100 |
Key: Atlas HC = Atlas HammerCloud (Queue RAL-LCG2_UCORE, Template 841); CMS HC = CMS HammerCloud
| Notes from Meeting. |
- The recent problems with Echo were discussed. A summary is also in the Operations report. Several points:
- Current situation is that we have “production” access running
- Atlas and CMS have upper limits on batch jobs about equal to pledge.
- The additional memory for the Dell storage nodes has arrived. This will be added – at least initially in a rolling upgrade. However, it is expected this may take up to something like 2 weeks. (At which point we expect to be able to give full access to Echo). Discussions on the best way to do the memory upgrades is ongoing.
- Before the problem we had noted that the LHCb files came from Castor in a “bursty” way. It was suggested last week that we limit the FTS to smooth out this burstiness.
- When discussing GGUS tickets: LHCb are seeing some file transfer failures between worker nodes and Castor. This to be escalated.
- The requirement for us to be able to easily contact all users of Echo in the event of a problem was noted.
