From: Xiubo Li <xiubli@xxxxxxxxxx>
*** Merry Christmas and Happy New Year! ***
This will collect the dentry lease and sessions' cap hit/mis metrics.
======= SHOW METRICS IN KCLIENT SIDE ======
You can show this via the "metrics" debugfs, it will look like:
$ cat /sys/kernel/debug/ceph/XXX.client4783/metrics
item total miss hit
-------------------------------------------------
d_lease 131 24 2891
session caps miss hit
-------------------------------------------------
0 54 3 106
1 108 13 3254
======= SHOW METRICS IN MDS SIDE =======
And if you want to send this metrics stuff to MDS servers, you need
to enable it by writing a "1" to sending_metrics debugfs:
$ echo 1 > /sys/kernel/debug/ceph/XXX.client4783/sending_metrics
And it will send the metric stuff periodically every second.
Disabled as default.
Then in the MDS we can show this by using:
$ ceph mgr module enable stats
$ ceph fs perf stats | python -m json.tool
{
"client_metadata": {
"client.4783": {
"IP": "v1:192.168.195.165",
"hostname": "fedora1",
"mount_point": "N/A",
"root": "/"
}
},
"counters": [
"cap_hit"
],
"global_counters": [
"read_latency",
"write_latency",
"metadata_latency"
],
"global_metrics": {
"client.4783": [
[
0,
0
],
[
0,
0
],
[
0,
0
]
]
},
"metrics": {
"delayed_ranks": [],
"mds.0": {
"client.4783": [
[
106,
3
]
]
},
"mds.1": {
"client.4783": [
[
3254,
13
]
]
}
}
}
Currently the MDS hasn't support the dentry lease metric showing yet.
Xiubo Li (4):
ceph: add global dentry lease metric support
ceph: add caps perf metric for each session
ceph: periodically send cap and dentry lease perf metrics to MDS
ceph: add enable/disable sending metrics to MDS debugfs support
fs/ceph/acl.c | 2 +-
fs/ceph/caps.c | 63 +++++++++---
fs/ceph/debugfs.c | 94 +++++++++++++++++-
fs/ceph/dir.c | 38 +++++--
fs/ceph/file.c | 6 +-
fs/ceph/inode.c | 8 +-
fs/ceph/mds_client.c | 188 +++++++++++++++++++++++++++++++----
fs/ceph/mds_client.h | 15 +++
fs/ceph/snap.c | 2 +-
fs/ceph/super.h | 14 ++-
fs/ceph/xattr.c | 8 +-
include/linux/ceph/ceph_fs.h | 39 ++++++++
12 files changed, 414 insertions(+), 63 deletions(-)
--
2.21.0
