# Latest **URL:** https://eos-community.web.cern.ch/latest.md [Latest](https://eos-community.web.cern.ch/latest.md) · [Categories](https://eos-community.web.cern.ch/categories.md) --- ## [Welcome to EOS Community](https://eos-community.web.cern.ch/t/welcome-to-eos-community/8)
**Author:** [@system](https://eos-community.web.cern.ch/u/system)\ **Replies:** 0\ **Last updated:** [February 23, 2018, 9:30am UTC](https://eos-community.web.cern.ch/t/welcome-to-eos-community/8 "2018-02-23T09:30:32Z")
Welcome to EOS community! This forum is for bringing together users, collaborators and developers around the world. Here, they will be able to exchange ideas, tips and to help each other in an easy and user-friendly wa… --- ## [Sec.protbind security hardening for EOS](https://eos-community.web.cern.ch/t/sec-protbind-security-hardening-for-eos/1458)
**Author:** [@rptaylor](https://eos-community.web.cern.ch/u/rptaylor)\ **Replies:** 0\ **Last updated:** [November 13, 2026, 12:56am UTC](https://eos-community.web.cern.ch/t/sec-protbind-security-hardening-for-eos/1458 "2026-11-13T00:56:14Z")
Following up on my earlier topic: Sec.protbind config for EOS I have made some progress in further investigation: Making sure you're not a bot! protbind directive for localhost does not work · xrootd/xrootd · Discussi… --- ## [Group draining stuck at "Cannot pick, Empty source or target groups"](https://eos-community.web.cern.ch/t/group-draining-stuck-at-cannot-pick-empty-source-or-target-groups/1454)
**Author:** [@sjumarea](https://eos-community.web.cern.ch/u/sjumarea)\ **Replies:** 0\ **Last updated:** [October 27, 2026, 3:53pm UTC](https://eos-community.web.cern.ch/t/group-draining-stuck-at-cannot-pick-empty-source-or-target-groups/1454 "2026-10-27T15:53:26Z")
Hello, I am trying to drain a group, as I need to remove the disks from that group. I’ve set the group in drain, but there are no drain jobs running. From the logs, it looks like some jobs started, failed, then nothin… --- ## [SciTokens Identity Mapping Issue over XRootD](https://eos-community.web.cern.ch/t/scitokens-identity-mapping-issue-over-xrootd/1450)
**Author:** [@yiruc](https://eos-community.web.cern.ch/u/yiruc)\ **Replies:** 3\ **Last updated:** [October 23, 2026, 7:04am UTC](https://eos-community.web.cern.ch/t/scitokens-identity-mapping-issue-over-xrootd/1450 "2026-10-23T07:04:51Z")
Dear Experts, We are trying to enable SciTokens support over the XRootD protocol on our EOS MGM setup, but we are encountering an issue with user identity mapping. Although we have configured SciTokens and enabled ZTN … --- ## [EOS 5.5.0 MGM with WLCG token support fails to start](https://eos-community.web.cern.ch/t/eos-5-5-0-mgm-with-wlcg-token-support-fails-to-start/1442)
**Author:** [@georgep](https://eos-community.web.cern.ch/u/georgep)\ **Replies:** 29\ **Last updated:** [October 9, 2026, 10:24am UTC](https://eos-community.web.cern.ch/t/eos-5-5-0-mgm-with-wlcg-token-support-fails-to-start/1442 "2026-10-09T10:24:35Z")
Hello, I have upgraded one of our preprod instances to EOS 5.5.0 and it works fine with current auth config (x509/GSI). When I add to /etc/xrd.cf.mgm all the directives I think I need for WLCG token authentication the M… --- ## [Http.desthttps has no effect — HTTP redirect to FST still uses plain HTTP despite TLS working and directive accepted](https://eos-community.web.cern.ch/t/http-desthttps-has-no-effect-http-redirect-to-fst-still-uses-plain-http-despite-tls-working-and-directive-accepted/1443)
**Author:** [@wander](https://eos-community.web.cern.ch/u/wander)\ **Replies:** 2\ **Last updated:** [September 24, 2026, 6:37pm UTC](https://eos-community.web.cern.ch/t/http-desthttps-has-no-effect-http-redirect-to-fst-still-uses-plain-http-despite-tls-working-and-directive-accepted/1443 "2026-09-24T18:37:33Z")
Environment: EOS\_SERVER\_VERSION: 5.4.3, EOS\_SERVER\_RELEASE: 1 XRootD version: 5.9.4 OS: AlmaLinux 10 Topology: 3 MGMs + 4 FSTs Problem: Clients that follow HTTP redirects (rclone, curl with security checks enabled) r… --- ## [Scale out of EOS FST with existing and new rain6 config](https://eos-community.web.cern.ch/t/scale-out-of-eos-fst-with-existing-and-new-rain6-config/1440)
**Author:** [@prasun](https://eos-community.web.cern.ch/u/prasun)\ **Replies:** 2\ **Last updated:** [September 22, 2026, 2:28pm UTC](https://eos-community.web.cern.ch/t/scale-out-of-eos-fst-with-existing-and-new-rain6-config/1440 "2026-09-22T14:28:27Z")
We are currently running a test bed setup of 4 fst with mgm, qdb and fst. We had make a two rain6 group i.e. default within 12 disks (9 + 2 +1) and it’s run perfectly. Attributes configuration for /eos/alicekolkata/gri… --- ## [EOS startup on slow networks: systemd drop-in fixes](https://eos-community.web.cern.ch/t/eos-startup-on-slow-networks-systemd-drop-in-fixes/1438)
**Author:** [@ChristianTacke](https://eos-community.web.cern.ch/u/ChristianTacke)\ **Replies:** 3\ **Last updated:** [September 22, 2026, 11:02am UTC](https://eos-community.web.cern.ch/t/eos-startup-on-slow-networks-systemd-drop-in-fixes/1438 "2026-09-22T11:02:58Z")
I wanted to share this (and maybe it could be integrated?). We’re currently running one of our EOS instances on an InfiniBand network. The interface sometimes needs a minute or more to get fully ready. During this time,… --- ## [Xfs kernel dump](https://eos-community.web.cern.ch/t/xfs-kernel-dump/1148)
**Author:** [@jwhite](https://eos-community.web.cern.ch/u/jwhite)\ **Replies:** 5\ **Last updated:** [September 21, 2026, 2:21pm UTC](https://eos-community.web.cern.ch/t/xfs-kernel-dump/1148 "2026-09-21T14:21:54Z")
During the EOS workshop this year, an issue was mentioned involving XFS kernel crashes. I mentioned that we had been experiencing them quite frequently but that draining had resolved the issue. Shortly after the worksh… --- ## [FST error every 10 seconds: "cannot send report broadcast"](https://eos-community.web.cern.ch/t/fst-error-every-10-seconds-cannot-send-report-broadcast/1402)
**Author:** [@rptaylor](https://eos-community.web.cern.ch/u/rptaylor)\ **Replies:** 8\ **Last updated:** [August 13, 2026, 11:03pm UTC](https://eos-community.web.cern.ch/t/fst-error-every-10-seconds-cannot-send-report-broadcast/1402 "2026-08-13T23:03:17Z")
We seem to get these errors on FSTs pretty regularly every 10 seconds, running EOS 5.4.1: 260408 02:05:50 time=1775606750.768946 func=Report level=ERROR logid=FstOfsStorage unit=fst@eos-fst-2.eos-fst.… --- ## [Repository keys (ubuntu, debian)](https://eos-community.web.cern.ch/t/repository-keys-ubuntu-debian/1431)
**Author:** [@b4a87c952a42d02ecdd2](https://eos-community.web.cern.ch/u/b4a87c952a42d02ecdd2)\ **Replies:** 4\ **Last updated:** [July 28, 2026, 9:24pm UTC](https://eos-community.web.cern.ch/t/repository-keys-ubuntu-debian/1431 "2026-07-28T21:24:03Z")
(Preparation of) Installation of xrootd/eos packages in Debian/Ubuntu fails without the proper gpg key for the reposotiries - where can these be found? For " Index of /storage-ci/debian/eos/diopside resolute", apt tell… --- ## [Eos 5.5.0 breakage : MGM root://localhost not online/reachable](https://eos-community.web.cern.ch/t/eos-5-5-0-breakage-mgm-root-localhost-not-online-reachable/1427)
**Author:** [@asevcenc](https://eos-community.web.cern.ch/u/asevcenc)\ **Replies:** 4\ **Last updated:** [July 21, 2026, 7:31am UTC](https://eos-community.web.cern.ch/t/eos-5-5-0-breakage-mgm-root-localhost-not-online-reachable/1427 "2026-07-21T07:31:32Z")
so, after updating all my mgms to 5.5.0 trying an eos fs ls gives error: MGM root://localhost not online/reachable but the service seems running: systemctl status eos@mgm ●eos@mgm.service - EOS mgm Loaded: loade… --- ## [Installing alicetokenacc and eos packages](https://eos-community.web.cern.ch/t/installing-alicetokenacc-and-eos-packages/1436)
**Author:** [@kmwf](https://eos-community.web.cern.ch/u/kmwf)\ **Replies:** 3\ **Last updated:** [July 17, 2026, 9:05pm UTC](https://eos-community.web.cern.ch/t/installing-alicetokenacc-and-eos-packages/1436 "2026-07-17T21:05:10Z")
Hi, I very recently ran into an issue trying to install the alicetokenacc package: bash-4.4# dnf install alicetokenacc Last metadata expiration check: 0:09:13 ago on Thu 16 Jul 2026 03:04:39 PM PDT. Error: Problem: … --- ## [Quarkdb getting full quicker](https://eos-community.web.cern.ch/t/quarkdb-getting-full-quicker/1432)
**Author:** [@thlatshw](https://eos-community.web.cern.ch/u/thlatshw)\ **Replies:** 2\ **Last updated:** [July 15, 2026, 10:10am UTC](https://eos-community.web.cern.ch/t/quarkdb-getting-full-quicker/1432 "2026-07-15T10:10:28Z")
Good day, Please assist with our quarkdb storage trouble-shooting. The occupied storage on the disks is only 52.85TB while quarkdb namespace usage is 94GB. It seems like the usage on quarkdb storage increases by approxi… --- ## [Applying a quota to existing data](https://eos-community.web.cern.ch/t/applying-a-quota-to-existing-data/1270)
**Author:** [@jwhite](https://eos-community.web.cern.ch/u/jwhite)\ **Replies:** 10\ **Last updated:** [July 14, 2026, 6:31pm UTC](https://eos-community.web.cern.ch/t/applying-a-quota-to-existing-data/1270 "2026-07-14T18:31:25Z")
We have a situation where we have populated some 700TB of data in a directory before a quota was applied. The quota appears to only be applied to new data in said directory (data written after the quota). Is there a tr… --- ## [Moving \`QDB\_PORT\` to \`generic/all\`?](https://eos-community.web.cern.ch/t/moving-qdb-port-to-generic-all/1430)
**Author:** [@ChristianTacke](https://eos-community.web.cern.ch/u/ChristianTacke)\ **Replies:** 0\ **Last updated:** [July 12, 2026, 11:50am UTC](https://eos-community.web.cern.ch/t/moving-qdb-port-to-generic-all/1430 "2026-07-12T11:50:22Z")
In the default config, QDB\_PORT is defined in /etc/eos/config/fst/fst, and …/qdb/qdb: misc/etc/eos/config/fst/fst 9: QDB\_PORT=7777 misc/etc/eos/config/qdb/qdb 9: QDB\_PORT=7777 Could one move this to …/generic… --- ## [Unexpected low write performance with EOS raid5/raid6 layout compared to plain layout](https://eos-community.web.cern.ch/t/unexpected-low-write-performance-with-eos-raid5-raid6-layout-compared-to-plain-layout/1414)
**Author:** [@38d373f2e6020441601d](https://eos-community.web.cern.ch/u/38d373f2e6020441601d)\ **Replies:** 2\ **Last updated:** [June 29, 2026, 2:04pm UTC](https://eos-community.web.cern.ch/t/unexpected-low-write-performance-with-eos-raid5-raid6-layout-compared-to-plain-layout/1414 "2026-06-29T14:04:59Z")
Hello everyone, I am currently testing write performance in EOS, especially with the idea of using an EOS space as a CTA disk buffer. In my setup, writing to a normal directory reaches around 2.0–2.6 GB/s. When I writ… --- ## [EOS (qdb) log level](https://eos-community.web.cern.ch/t/eos-qdb-log-level/1422)
**Author:** [@b4a87c952a42d02ecdd2](https://eos-community.web.cern.ch/u/b4a87c952a42d02ecdd2)\ **Replies:** 0\ **Last updated:** [June 25, 2026, 4:10pm UTC](https://eos-community.web.cern.ch/t/eos-qdb-log-level/1422 "2026-06-25T16:10:00Z")
On a fresh 5.4.7 test installation, the log of the QDB is flooded by \`\`\` 260624 18:34:13 time=1782318853.561605 INFO: During the last 10 seconds, I serviced 0 reads (0 Hz), and 4 writes (0 Hz) over 4 write transactions … --- ## [Possibility to change all.sitename and mgmofs.instance](https://eos-community.web.cern.ch/t/possibility-to-change-all-sitename-and-mgmofs-instance/1420)
**Author:** [@rptaylor](https://eos-community.web.cern.ch/u/rptaylor)\ **Replies:** 2\ **Last updated:** [June 24, 2026, 7:16am UTC](https://eos-community.web.cern.ch/t/possibility-to-change-all-sitename-and-mgmofs-instance/1420 "2026-06-24T07:16:58Z")
Hi, I would like to change the all.sitename setting in the xrootd config file to make it unique for each of our EOS instances. As I understand it is used for macaroons for TPC. My impression is that changing it should b… --- ## [Questions on expanding EOS cluster with heterogeneous hardware (Intel/DELL to AMD/ASUS) using Podman on AlmaLinux 9](https://eos-community.web.cern.ch/t/questions-on-expanding-eos-cluster-with-heterogeneous-hardware-intel-dell-to-amd-asus-using-podman-on-almalinux-9/1419)
**Author:** [@kong91](https://eos-community.web.cern.ch/u/kong91)\ **Replies:** 0\ **Last updated:** [June 23, 2026, 7:11am UTC](https://eos-community.web.cern.ch/t/questions-on-expanding-eos-cluster-with-heterogeneous-hardware-intel-dell-to-amd-asus-using-podman-on-almalinux-9/1419 "2026-06-23T07:11:48Z")
Hello EOS Community, We are currently operating an EOS 5.3 storage cluster and planning to expand our infrastructure by adding new nodes. The new environment will introduce a heterogeneous hardware and containerized set… --- ## [Stat.statfs.freebytes has not yet been defined](https://eos-community.web.cern.ch/t/stat-statfs-freebytes-has-not-yet-been-defined/886)
**Author:** [@peby](https://eos-community.web.cern.ch/u/peby)\ **Replies:** 5\ **Last updated:** [June 17, 2026, 5:30pm UTC](https://eos-community.web.cern.ch/t/stat-statfs-freebytes-has-not-yet-been-defined/886 "2026-06-17T17:30:16Z")
eos experts, perhaps you can assist us in determining the root cause possible solutions for this new install issue. We installed two new eos-server-5.1.23 FSTs with identical hardware. One has been operating fine. Howev… --- ## [Write and Read authorization error](https://eos-community.web.cern.ch/t/write-and-read-authorization-error/1225)
**Author:** [@tamatsum](https://eos-community.web.cern.ch/u/tamatsum)\ **Replies:** 35\ **Last updated:** [May 15, 2026, 5:29pm UTC](https://eos-community.web.cern.ch/t/write-and-read-authorization-error/1225 "2026-05-15T17:29:44Z")
Hello!! I am checking my site configuration by using testSE command. Is there anything missing in the authentication settings? ALICE::HIROSHIMA::EOS Open write test: could write, (NOT OK), please check authorization… --- ## [EOS Permission Error](https://eos-community.web.cern.ch/t/eos-permission-error/1411)
**Author:** [@prasun](https://eos-community.web.cern.ch/u/prasun)\ **Replies:** 0\ **Last updated:** [May 6, 2026, 9:46am UTC](https://eos-community.web.cern.ch/t/eos-permission-error/1411 "2026-05-06T09:46:42Z")
Hi EOS Team, We are constantly trying to make it usable, but some glitch is there and shows permission denied for copying any file. Still we could not catch it. Kindly help to resolve it. As such ALICE::Kolkata ::EOS2 … --- ## [Change/repair checksum of disk replica](https://eos-community.web.cern.ch/t/change-repair-checksum-of-disk-replica/1406)
**Author:** [@georgep](https://eos-community.web.cern.ch/u/georgep)\ **Replies:** 8\ **Last updated:** [April 27, 2026, 11:46am UTC](https://eos-community.web.cern.ch/t/change-repair-checksum-of-disk-replica/1406 "2026-04-27T11:46:24Z")
Hello, For one of our files, the adler32 checksum of a disk replica is differnt than the one kept in the EOS namespace (which we think is the correct checksum) and as a result the file cannot be written to tape by CTA. … --- ## [How to increase fs draining speed](https://eos-community.web.cern.ch/t/how-to-increase-fs-draining-speed/1405)
**Author:** [@asevcenc](https://eos-community.web.cern.ch/u/asevcenc)\ **Replies:** 1\ **Last updated:** [April 21, 2026, 11:31am UTC](https://eos-community.web.cern.ch/t/how-to-increase-fs-draining-speed/1405 "2026-04-21T11:31:32Z")
HI! Does anyone have some experience with increasing draining speed of a fs? The destination fs’s are not used (have deny placement) and they are 7 (i’m draining 1 fs to 7) and i would expect to have quite some speed .… --- ## [Remove VID Policy "Tident"](https://eos-community.web.cern.ch/t/remove-vid-policy-tident/1392)
**Author:** [@prasun](https://eos-community.web.cern.ch/u/prasun)\ **Replies:** 10\ **Last updated:** [April 17, 2026, 4:59am UTC](https://eos-community.web.cern.ch/t/remove-vid-policy-tident/1392 "2026-04-17T04:59:07Z")
Hi , We accidentally entered an incorrect EOS VID policy i.e. :- tident:“keosteam@eos-mgm”:gid =\> keosteam tident:“keosteam@eos-mgm”:uid =\> keosteam However, we are unable to delete it and are receiving an error. We … --- ## [QuarkDB backup: missing quarkdb-checkpoint cmd](https://eos-community.web.cern.ch/t/quarkdb-backup-missing-quarkdb-checkpoint-cmd/487)
**Author:** [@ebirngru](https://eos-community.web.cern.ch/u/ebirngru)\ **Replies:** 6\ **Last updated:** [March 26, 2026, 12:14am UTC](https://eos-community.web.cern.ch/t/quarkdb-backup-missing-quarkdb-checkpoint-cmd/487 "2026-03-26T00:14:12Z")
Dear all, We’re running an EOS instance with 3 MGMs and ns in quarkdb. According to quarkdb docs, https://quarkdb.web.cern.ch/quarkdb/docs/master/backup/ We should use the command ‘quarkdb-checkpoint’ to create a chec… --- ## [ATLAS DDM dark data storage dumps](https://eos-community.web.cern.ch/t/atlas-ddm-dark-data-storage-dumps/1401)
**Author:** [@rptaylor](https://eos-community.web.cern.ch/u/rptaylor)\ **Replies:** 2\ **Last updated:** [March 19, 2026, 10:19pm UTC](https://eos-community.web.cern.ch/t/atlas-ddm-dark-data-storage-dumps/1401 "2026-03-19T22:19:53Z")
Hi, For ATLAS DDM, storage dumps (a list of files in each RSE/spacetoken) must be written periodically as described here: Sign in to CERN My first thought is that something basically like eos find -f $datadir | sed "s|… --- ## [Eos accounting report](https://eos-community.web.cern.ch/t/eos-accounting-report/870)
**Author:** [@jiyou](https://eos-community.web.cern.ch/u/jiyou)\ **Replies:** 2\ **Last updated:** [March 17, 2026, 6:08pm UTC](https://eos-community.web.cern.ch/t/eos-accounting-report/870 "2026-03-17T18:08:37Z")
Hi Is there any helpful guide to setup eos accounting report? $ eos accounting report -f We need to setup accounting for /eos/atlas/ , but couldn’t find instructions to do? Thanks Jingya --- ## [EOS tokens](https://eos-community.web.cern.ch/t/eos-tokens/1395)
**Author:** [@marsuaga](https://eos-community.web.cern.ch/u/marsuaga)\ **Replies:** 1\ **Last updated:** [March 3, 2026, 3:16pm UTC](https://eos-community.web.cern.ch/t/eos-tokens/1395 "2026-03-03T15:16:00Z")
Hi @eosbot how I can create an EOS token? [Next page](https://eos-community.web.cern.ch/latest.md?page=1)