Thank you, Xiubo - yes, checking my ceph.repo file as specified at https://docs.ceph.com/en/pacific/install/get-packages/#rhel reminded me that I had set the ceph-noarch repo to disabled, because we didn't want ceph trying to update itself outside of using cephadm for new builds. Flipping that bit to 1 then re-running yum update then yum install cephfs-top solved that problem.
However, that leads to a second question then - after running the required command to create the fstop user with $ ceph auth get-or-create client.fstop mon 'allow r' mds 'allow r' osd 'allow r' mgr 'allow r' as the instructions specify, and adding the file ceph.client.fstop.keyring with the relevant key to /etc/ceph on the node in question (which the instructions do not specify and I will make a github edit later), I am getting an error:
"exception: use_default_colors() returned
ERR"
Beyond that, it seems like the system that cephfs-top needs to
work, perf stats, has no data in the output fields?
ceph01.ssc.wisc.edu> ceph fs perf stats
{"version": 1, "global_counters": ["cap_hit", "read_latency",
"write_latency", "metadata_latency", "dentry_lease",
"opened_files", "pinned_icaps", "opened_inodes",
"read_io_sizes", "write_io_sizes"], "counters": [],
"client_metadata": {}, "global_metrics": {}, "metrics":
{"delayed_ranks": []}}
I activated ceph fs perf stats yesterday, so by this point I
should have data in the stats, unless there is a problem
elsewhere?
Hi Zach,
On 18/10/2022 04:20, Zach Heise (SSCC) wrote:
I'd like to see what CephFS clients are doing the most IO. According to this page: https://docs.ceph.com/en/quincy/cephfs/cephfs-top/ - cephfs-top is the simplest way to do this? I enabled 'ceph mgr module enable stats' today, but I'm a bit confused about what the best way is to get the cephfs-top package to use this perf stats.
If you are building code from source then you should run it just by:
[ceph/build]$ ./src/tools/cephfs/top/cephfs-top
You can also find the main/quincy/pacific builds for different distro pacakges under [1] and their artifacts are made available under [2].
[1] https://shaman.ceph.com/builds/ceph/
[2] https://shaman.ceph.com/repos/ceph/Thanks!
- Xiubo
The ceph doc page linked above just mentions "cephfs-top is available as part of cephfs-top package" but it does not list what repo is required to access this. Anyone using cephfs-top themselves, and know the missing parts of this document that should be added?
--
Zach Heise
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