juicefs summary stats incorrect.

[zhoucheng361]

What happened:

root@iZj6c46anp858xt8jhb9udZ:~/jfs# ./juicefs summary /jfs/mdtest/test-dir.0-0/mdtest_tree.0/mdtest_tree.0/mdtest_tree.6/mdtest_tree.9/ | head
+---------------------------------+---------+------+-------+
|               PATH              |   SIZE  | DIRS | FILES |
+---------------------------------+---------+------+-------+
| /                               |  45 MiB |   11 |  5786 |
| mdtest_tree.3/                  | 4.7 MiB |    1 |   600 |
| mdtest_tree.3/file.mdtest.38.11 | 8.0 KiB |    0 |     1 |
| mdtest_tree.3/file.mdtest.73.94 | 8.0 KiB |    0 |     1 |
| mdtest_tree.3/file.mdtest.51.49 | 8.0 KiB |    0 |     1 |
| mdtest_tree.3/file.mdtest.44.52 | 8.0 KiB |    0 |     1 |
| mdtest_tree.3/file.mdtest.44.48 | 8.0 KiB |    0 |     1 |
root@iZj6c46anp858xt8jhb9udZ:~/jfs# ./juicefs summary /jfs/mdtest/test-dir.0-0/mdtest_tree.0/mdtest_tree.0/mdtest_tree.6/ | grep " mdtest_tree.9/"
| mdtest_tree.9/               |  45 MiB |   11 |  5769 |
| mdtest_tree.9/mdtest_tree.3/ | 4.7 MiB |    1 |   600 |
| mdtest_tree.9/mdtest_tree.0/ | 4.4 MiB |    1 |   569 |
| mdtest_tree.9/mdtest_tree.8/ | 3.9 MiB |    1 |   500 |
| mdtest_tree.9/mdtest_tree.4/ | 3.9 MiB |    1 |   500 |
| mdtest_tree.9/mdtest_tree.6/ | 3.9 MiB |    1 |   500 |
| mdtest_tree.9/mdtest_tree.7/ | 3.9 MiB |    1 |   500 |
| mdtest_tree.9/mdtest_tree.2/ | 3.9 MiB |    1 |   500 |
| mdtest_tree.9/mdtest_tree.9/ | 3.9 MiB |    1 |   500 |
| mdtest_tree.9/mdtest_tree.5/ | 3.9 MiB |    1 |   500 |
| mdtest_tree.9/mdtest_tree.1/ | 3.9 MiB |    1 |   500 |
| mdtest_tree.9/...            | 4.7 MiB |    0 |   600 |

What you expected to happen:
files should be the same of both summary results.

How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?

Environment:

• JuiceFS version (use juicefs --version) or Hadoop Java SDK version:
• Cloud provider or hardware configuration running JuiceFS:
• OS (e.g cat /etc/os-release):
• Kernel (e.g. uname -a):
• Object storage (cloud provider and region, or self maintained):
• Metadata engine info (version, cloud provider managed or self maintained):
• Network connectivity (JuiceFS to metadata engine, JuiceFS to object storage):
• Others:

[anysql]

What type of meta engine? And the mdtest command?

[davies]

The summary is based on dir stats, which are updated async in background and not accurate.