[gitkenan]

Summary

• Add a stdlib-only parallel SSH layer to common.py using asyncio + the system ssh binary, so benchmarks can opt out of pdsh with no new dependencies
• Introduce benchmark/elbencho.py — an S3 benchmark that runs its entire lifecycle (binary check, cleandir, dropcaches, workload fan-out, result pull) through the async SSH path
• Register Elbencho in benchmarkfactory.py (import + dict entry only — no changes to get_all() or all_configs())
• 49 unit tests covering construction, validation, factory integration, CLI command building, run-loop fan-out, and pdsh-free lifecycle
• User-facing docs and a working example YAML config

How Elbencho avoids Cartesian expansion

Elbencho's list-valued parameters (threads, iodepth, blocksize) live inside the workloads: block, not at the top level. all_configs() only sees top-level keys, which are all scalars or dicts, so it naturally yields a single config — no special-case code in the factory needed.

Test plan

• python -m unittest tests.test_bm_elbencho — 49 tests pass
• Verify no regressions in existing benchmark tests

798 tests ran, all Elbencho tests (49) pass. The 7 failures are pre-existing post-processing test issues unrelated to our code.

• End-to-end run against an RGW cluster with the example YAML

[gitkenan]

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                                        ── AI REVIEW ──

Scope

The diff matches the Jira ticket and PR description. Story 2 requires registering Elbencho as a benchmark class with factory integration, workload storage, and validation — all present. The _run_workloads() stub is explicitly documented as Story 3 work. No scope creep detected.

Code Review

[P1] benchmark/elbencho.py:71 — The validation loop checks "s3_bucket" is present in the effective merged config, but the error message says "missing required key 's3_bucket'". However, s3_bucket could be defined at the top level (in _global_defaults) and inherited by workloads. The current code does not add s3_bucket to _global_defaults (lines 57-60 only snapshot cmd_path and auth), so a top-level s3_bucket would not be inherited. Either: (1) add s3_bucket to the snapshot if it exists in the top-level config, or (2) document that s3_bucket must be per-workload only. The yaml-config-reference.md shows s3_bucket as a workload-level key (required), so option (2) is correct — but the validation should happen before the merge to give a clearer error.

[P2] benchmarkfactory.py:48 — The comment says "yield a single instance with the raw config dict" but the code does configs = [dict(config)]. This creates a shallow copy, which is fine, but the comment could be clearer: "yield a single instance with a copy of the raw config dict (no Cartesian expansion)".

[P2] benchmark/elbencho.py:64 — The comment "Used to construct the three-tier directory structure (mode/threads/iodepth)" is accurate for Story 3 but misleading in Story 2 where base_run_dir is assigned but never used. Consider adding "(Story 3)" to the comment or deferring the assignment to Story 3.

[P2] tests/test_bm_elbencho.py:44 — The test fixture _FULL_CONFIG includes "secret_key=TEST_SECRET_KEY_DO_NOT_USE" in the auth config string. While this is clearly marked as a test value, it would be safer to use a placeholder like "secret_key=<redacted>" or "secret_key=***" to avoid any possibility of this being copy-pasted into real configs.

[P3] benchmark/elbencho.py:48 — The ValueError message "workloads must be a dict" could be more helpful by showing the actual type received: f"workloads must be a dict, got {type(self.workloads).__name__}".

[P3] benchmarkfactory.py:5-15 — The imports are now alphabetically sorted (good), but the original file had them grouped by benchmark type. The new ordering is fine, but it's a style change unrelated to the core feature. Not blocking, but worth noting for consistency with future PRs.

Security

Credential handling in tests: The test fixture _FULL_CONFIG embeds a fake secret key in plaintext. This is acceptable for unit tests but the comment should explicitly state it's a non-functional test value. The yaml-config-reference.md correctly documents three credential options (inline, env vars, session token) with appropriate warnings about inline credentials appearing in logs. No production credential leakage risk identified.

Summary

The registration is solid and the factory bypass logic is correct. The P1 issue around s3_bucket validation needs clarification — either allow top-level inheritance or validate strictly at the workload level before merging. The P2 items are minor clarity improvements. Tests are comprehensive and the pre-commit scoping is well-designed.

[gitkenan]

[perezjosibm]

Just a few changes needed, eg checking return values from pdsh, documentation. Looking very good, many thanks!

[harriscr]

Looking good. I like the fact we have a good set of unit tests for the new code. The structure for the remote_executor works nicely and should be easy to fit pdsh into.

Just some minor things to look at and it will be good to go

[gitkenan]

All of the above should be acknowledged now, or documented for soon-to-comes. The latest force-push has been tested with the following success log for running Elbencho:

09:30:52 - DEBUG    - cbt      - Settings.cluster:
    {'archive_dir': '/tmp/cbt-results',
     'clients': ['cephalasquad6'],
     'clusterid': 'ceph',
     'conf_file': '/etc/ceph/ceph.conf',
     'head': 'cephalasquad6',
     'iterations': 1,
     'osds': ['cephalasquad6'],
     'osds_per_node': 1,
     'rgws': ['cephalasquad6'],
     'tmp_dir': '/tmp/cbt',
     'use_existing': True,
     'user': 'root'}
09:30:52 - INFO     - cbt      - Results dir: /tmp/cbt-results/results/00000000/id-ee0e2095
09:30:52 - INFO     - cbt      - Elbencho workload 'write_small': {'s3_bucket': 'cbt-benchmark', 'mode': 'write', 'mkdirs': True, 'threads': [1, 4], 'iodepth': [1, 4], 'blocksize': ['5g'], 'size': '10m', 'num_objects': 100, 'duration': 30}
09:30:52 - INFO     - cbt      - Elbencho workload 'read_small': {'s3_bucket': 'cbt-benchmark', 'mode': 'read', 'threads': [1, 4], 'iodepth': [1, 4], 'blocksize': ['5g'], 'size': '10m', 'num_objects': 100, 'duration': 30}
09:30:52 - INFO     - cbt      - Verifying elbencho binary is executable on all client nodes: /usr/local/bin/elbencho
09:30:52 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:30:52 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:30:53 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:30:53 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:30:53 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:30:53 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:30:53 - INFO     - cbt      - Results dir: /tmp/cbt-results/results/00000000/id-ee0e2095
09:30:53 - INFO     - cbt      - Elbencho workload 'write_small': {'s3_bucket': 'cbt-benchmark', 'mode': 'write', 'mkdirs': True, 'threads': [1, 4], 'iodepth': [1, 4], 'blocksize': ['5g'], 'size': '10m', 'num_objects': 100, 'duration': 30}
09:30:53 - INFO     - cbt      - Elbencho workload 'read_small': {'s3_bucket': 'cbt-benchmark', 'mode': 'read', 'threads': [1, 4], 'iodepth': [1, 4], 'blocksize': ['5g'], 'size': '10m', 'num_objects': 100, 'duration': 30}
09:30:53 - INFO     - cbt      - Skipping existing Elbencho results in /tmp/cbt-results/results/00000000/id-ee0e2095.
09:30:53 - INFO     - cbt      - Running benchmark {'cmd_path': '/usr/local/bin/elbencho', 'auth': {'config': 'access_key=E51T4YI9Z6Z7AQ4AKAVY;secret_key=M8LCMloHx884hH0tKr15RCKnCF6ypF52ElmbkfC7;url=http://9.71.45.49:8000;retry=9'}, 'workloads': {'write_small': {'s3_bucket': 'cbt-benchmark', 'mode': 'write', 'mkdirs': True, 'threads': [1, 4], 'iodepth': [1, 4], 'blocksize': ['5g'], 'size': '10m', 'num_objects': 100, 'duration': 30}, 'read_small': {'s3_bucket': 'cbt-benchmark', 'mode': 'read', 'threads': [1, 4], 'iodepth': [1, 4], 'blocksize': ['5g'], 'size': '10m', 'num_objects': 100, 'duration': 30}}, 'benchmark': 'elbencho', 'iteration': 0} == iteration 0 ==
09:30:53 - INFO     - cbt      - Setting OSD Read Ahead to: 0
09:30:53 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 find /dev/disk/by-partlabel/osd-device-*data -exec readlink {} \; | cut -d"/" -f 3 | sed "s/[0-9]$//" | xargs -I{} sudo sh -c "echo 0 > /sys/block/'{}'/queue/read_ahead_kb"
09:30:53 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:30:53 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:30:54 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:30:54 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: 3
09:30:54 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:30:54 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:30:54 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:30:54 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 sudo /usr/bin/ceph -c /etc/ceph/ceph.conf daemon osd.0 config show > /tmp/cbt/00000000/Elbencho/osd_ra-00000000//ceph_settings.out
09:30:55 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 mkdir -p -m0755 -- /tmp/cbt/00000000/Elbencho/osd_ra-00000000//collectl
09:30:55 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 collectl -s+mYZ -i 1:10 -F0 -f /tmp/cbt/00000000/Elbencho/osd_ra-00000000//collectl --rawdskfilt \"+cciss/c\d+d\d+ |hd[ab] | sd[a-z]+ |dm-\d+ |xvd[a-z] |fio[a-z]+ | vd[a-z]+ |emcpower[a-z]+ |psv\d+ |nvme[0-9]n[0-9]+p[0-9]+ \"
09:30:56 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:30:56 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:30:56 - INFO     - cbt      - Elbencho [write_small] bs=5g threads=1 iodepth=1 → /tmp/cbt/00000000/Elbencho/osd_ra-00000000//write_5368709120/threads-001/iodepth-001
09:31:11 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:31:11 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
MKBUCKETS   Elapsed time     :        38ms        38ms
            Buckets/s        :          26          26
            Buckets total    :           1           1
---
WRITE       Elapsed time     :     15.333s     15.333s
            Objects/s        :           6           6
            Throughput MiB/s :          65          65
            Total MiB        :        1000        1000
            Objects total    :         100         100
---
09:31:11 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:31:12 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:31:12 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:31:12 - INFO     - cbt      - Elbencho [write_small] bs=5g threads=1 iodepth=4 → /tmp/cbt/00000000/Elbencho/osd_ra-00000000//write_5368709120/threads-001/iodepth-004
09:31:27 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:31:27 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
MKBUCKETS   Elapsed time     :        37ms        37ms
            Buckets/s        :          26          26
            Buckets total    :           1           1
---
WRITE       Elapsed time     :     15.342s     15.342s
            Objects/s        :           6           6
            Throughput MiB/s :          65          65
            Total MiB        :        1000        1000
            Objects total    :         100         100
---
09:31:27 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:31:28 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:31:28 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:31:28 - INFO     - cbt      - Elbencho [write_small] bs=5g threads=4 iodepth=1 → /tmp/cbt/00000000/Elbencho/osd_ra-00000000//write_5368709120/threads-004/iodepth-001
09:31:52 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:31:52 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
MKBUCKETS   Elapsed time     :        97ms        97ms
            Buckets/s        :          10          10
            Buckets total    :           1           1
---
WRITE       Elapsed time     :     23.811s     24.215s
            Objects/s        :          16          16
            Throughput MiB/s :         165         165
            Total MiB        :        3950        4000
            Objects total    :         394         400
---
09:31:52 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:31:53 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:31:53 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:31:53 - INFO     - cbt      - Elbencho [write_small] bs=5g threads=4 iodepth=4 → /tmp/cbt/00000000/Elbencho/osd_ra-00000000//write_5368709120/threads-004/iodepth-004
09:32:18 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:18 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
MKBUCKETS   Elapsed time     :        32ms        32ms
            Buckets/s        :          31          31
            Buckets total    :           1           1
---
WRITE       Elapsed time     :     24.649s     25.074s
            Objects/s        :          16          15
            Throughput MiB/s :         160         159
            Total MiB        :        3950        4000
            Objects total    :         395         400
---
09:32:18 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:19 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:19 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:19 - INFO     - cbt      - Elbencho [read_small] bs=5g threads=1 iodepth=1 → /tmp/cbt/00000000/Elbencho/osd_ra-00000000//read_5368709120/threads-001/iodepth-001
09:32:21 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:21 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
READ        Elapsed time     :      1.684s      1.684s
            Objects/s        :          59          59
            Throughput MiB/s :         593         593
            Total MiB        :        1000        1000
            Objects total    :         100         100
---
09:32:21 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:21 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:21 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:21 - INFO     - cbt      - Elbencho [read_small] bs=5g threads=1 iodepth=4 → /tmp/cbt/00000000/Elbencho/osd_ra-00000000//read_5368709120/threads-001/iodepth-004
09:32:22 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:22 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
READ        Elapsed time     :      1.067s      1.067s
            Objects/s        :          93          93
            Throughput MiB/s :         937         937
            Total MiB        :        1000        1000
            Objects total    :         100         100
---
09:32:22 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:23 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:23 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:23 - INFO     - cbt      - Elbencho [read_small] bs=5g threads=4 iodepth=1 → /tmp/cbt/00000000/Elbencho/osd_ra-00000000//read_5368709120/threads-004/iodepth-001
09:32:25 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:25 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
READ        Elapsed time     :      1.536s      2.374s
            Objects/s        :         187         168
            Throughput MiB/s :        1880        1684
            Total MiB        :        2889        4000
            Objects total    :         288         400
---
09:32:25 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:26 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:26 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:26 - INFO     - cbt      - Elbencho [read_small] bs=5g threads=4 iodepth=4 → /tmp/cbt/00000000/Elbencho/osd_ra-00000000//read_5368709120/threads-004/iodepth-004
09:32:28 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:28 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
READ        Elapsed time     :      1.538s      1.714s
            Objects/s        :         244         233
            Throughput MiB/s :        2456        2333
            Total MiB        :        3780        4000
            Objects total    :         377         400
---
09:32:28 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
09:32:28 - INFO     - cbt      - Elbencho: all workloads complete.
09:32:28 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 pkill -SIGINT -f collectl
09:32:29 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
09:32:29 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
[root@cephalasquad6 cbt]# vi example/wip-elbencho/elbencho_ex.yaml

15:42:57 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
15:42:57 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 pkill -SIGINT -f collectl
15:42:58 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
15:42:58 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
15:42:58 - INFO     - cbt      - Elbencho: running 1 command(s) → /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-001
15:42:58 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 mkdir -p -m0755 -- /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-001/collectl
15:42:58 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 collectl -s+mYZ -i 1:10 -F0 -f /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-001/collectl --rawdskfilt \"+cciss/c\d+d\d+ |hd[ab] | sd[a-z]+ |dm-\d+ |xvd[a-z] |fio[a-z]+ | vd[a-z]+ |emcpower[a-z]+ |psv\d+ |nvme[0-9]n[0-9]+p[0-9]+ \"
15:42:58 - DEBUG    - cbt      - Elbencho cmd: /usr/local/bin/elbencho --read --threads 4 --block 5g --iodepth 1 --size 10m --files 100 --timelimit 30 --s3endpoints http://9.71.45.49:8000 --s3key E51T4YI9Z6Z7AQ4AKAVY --s3secret M8LCMloHx884hH0tKr15RCKnCF6ypF52ElmbkfC7 --s3region default --resfile /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-001/result.csv s3://cbt-benchmark
15:43:01 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
15:43:01 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
READ        Elapsed time     :      1.501s      2.407s
            Objects/s        :         189         166
            Throughput MiB/s :        1896        1661
            Total MiB        :        2846        4000
            Objects total    :         284         400
---
15:43:01 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
15:43:01 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 pkill -SIGINT -f collectl
15:43:02 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
15:43:02 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
15:43:02 - INFO     - cbt      - Elbencho: running 1 command(s) → /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-004
15:43:02 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 mkdir -p -m0755 -- /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-004/collectl
15:43:02 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 collectl -s+mYZ -i 1:10 -F0 -f /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-004/collectl --rawdskfilt \"+cciss/c\d+d\d+ |hd[ab] | sd[a-z]+ |dm-\d+ |xvd[a-z] |fio[a-z]+ | vd[a-z]+ |emcpower[a-z]+ |psv\d+ |nvme[0-9]n[0-9]+p[0-9]+ \"
15:43:02 - DEBUG    - cbt      - Elbencho cmd: /usr/local/bin/elbencho --read --threads 4 --block 5g --iodepth 4 --size 10m --files 100 --timelimit 30 --s3endpoints http://9.71.45.49:8000 --s3key E51T4YI9Z6Z7AQ4AKAVY --s3secret M8LCMloHx884hH0tKr15RCKnCF6ypF52ElmbkfC7 --s3region default --resfile /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-004/result.csv s3://cbt-benchmark
15:43:04 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
15:43:04 - DEBUG    - cbt      - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
READ        Elapsed time     :      1.613s      1.658s
            Objects/s        :         244         241
            Throughput MiB/s :        2442        2412
            Total MiB        :        3941        4000
            Objects total    :         394         400
---
15:43:04 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
15:43:04 - DEBUG    - cbt      - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 pkill -SIGINT -f collectl
15:43:04 - INFO     - cbt      - Elbencho: all workloads complete.
15:43:05 - DEBUG    - cbt      - ssh [root@cephalasquad6] exit=0
15:43:05 - DEBUG    - cbt      - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.```

[gitkenan]

2026-09-22 14:53:45 - INFO     - cbt          - monitoring_factory.start:51 - Starting monitoring in /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-004
2026-09-22 14:53:45 - DEBUG    - cbt          - common.__init__:81 - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 mkdir -p -m0755 -- /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-004/collectl
2026-09-22 14:53:46 - DEBUG    - cbt          - common.__init__:81 - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 collectl -s+mYZ -i 1:10 -F0 -f /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-004/collectl --rawdskfilt \"+cciss/c\d+d\d+ |hd[ab] | sd[a-z]+ |dm-\d+ |xvd[a-z]+ |fio[a-z]+ | vd[a-z]+ |emcpower[a-z]+ |psv\d+ |nvme[0-9]n[0-9]+p[0-9]+ \"
2026-09-22 14:53:46 - DEBUG    - cbt          - elbencho._run_workloads:158 - Elbencho cmd: /usr/local/bin/elbencho --read --threads 4 --block 5g --iodepth 4 --size 10m --files 100 --timelimit 30 --s3endpoints http://9.71.45.49:8000 --s3key Z7USO508OSNPU2N69ADA --s3secret BH3yREoKGHX71q8ckxHIFWvYxzYqEK9uyZ1IDcAG --s3region default --resfile /tmp/cbt/00000000/Elbencho/osd_ra-00000000/elbencho/read_5368709120/threads-004/iodepth-004/result.csv s3://cbt-benchmark
2026-09-22 14:53:49 - DEBUG    - cbt          - async_ssh.run_command:75 - ssh [root@cephalasquad6] exit=0
2026-09-22 14:53:49 - DEBUG    - cbt          - async_ssh.run_command:77 - ssh [root@cephalasquad6] stdout: OPERATION   RESULT TYPE         FIRST DONE   LAST DONE
=========== ================    ==========   =========
READ        Elapsed time     :      2.827s      3.037s
            Objects/s        :         132         131
            Throughput MiB/s :        1328        1316
            Total MiB        :        3755        4000
            Objects total    :         375         400
---
2026-09-22 14:53:49 - DEBUG    - cbt          - async_ssh.run_command:79 - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
2026-09-22 14:53:49 - INFO     - cbt          - monitoring_factory.stop:58 - Stopping monitoring.
2026-09-22 14:53:49 - DEBUG    - cbt          - common.__init__:81 - CheckedPopen continue_if_error=True, shell=False args=pdsh -f 1 -R ssh -w root@cephalasquad6 pkill -SIGINT -f collectl
2026-09-22 14:53:49 - INFO     - cbt          - elbencho._run_workloads:162 - Elbencho: all workloads complete.
2026-09-22 14:53:50 - DEBUG    - cbt          - async_ssh.run_command:75 - ssh [root@cephalasquad6] exit=0
2026-09-22 14:53:50 - DEBUG    - cbt          - async_ssh.run_command:79 - ssh [root@cephalasquad6] stderr: Authorized users only. All activity may be monitored and reported.
2026-09-22 14:53:50 - INFO     - cbt          - cbt.main:97 - Benchmark {'cmd_path': '/usr/local/bin/elbencho', 'workloads': {'write_small': {'s3_bucket': 'cbt-benchmark', 'mode': 'write', 'mkdirs': True, 'threads': [1, 4], 'iodepth': [1, 4], 'blocksize': ['5g'], 'size': '10m', 'num_objects': 100, 'duration': 30}, 'read_small': {'s3_bucket': 'cbt-benchmark', 'mode': 'read', 'threads': [1, 4], 'iodepth': [1, 4], 'blocksize': ['5g'], 'size': '10m', 'num_objects': 100, 'duration': 30}}, 'benchmark': 'elbencho', 'iteration': 0, 's3_auth_config': 'access_key=Z7USO508OSNPU2N69ADA;secret_key=BH3yREoKGHX71q8ckxHIFWvYxzYqEK9uyZ1IDcAG;url=http://9.71.45.49:8000;retry=9', 's3_session_token': ''} iteration 0 complete.

Latest push has been verified to work, above is the tail end of the log showing the workloads completing

[harriscr]

Looks good. Thanks for your hard work on this