show cache location when warmup --check.

[zhoucheng361]

What would you like to be added:
show the cache location and size when we warmup with --check.

Why is this needed:
to check the location and size when needed.

[anysql]

The warmup check was performed in background thread, not done by client. So it's easy to print log but a little complex to send it back to client.

Need to some time to implement it.

[anysql]

Can you show me an example output?

[zhoucheng361]

something like this:

Checking: 1                            3.3/s
Checking: 1.0 GiB (1073741824 Bytes)   3.3 GiB/s
+------------------------------------------------+---------+------------+
|                    Location                    |   Size  | Percentage |
+------------------------------------------------+---------+------------+
| LOCAL:/tmp/jfsCache0/test-volume/              | 204 MiB |      19.9% |
| LOCAL:/tmp/jfsCache1/test-volume/              | 160 MiB |      15.6% |
| REMOTE:172.20.0.100:/var/jfsCache/test-volume/ | 348 MiB |      34.0% |
| REMOTE:172.20.0.101:/var/jfsCache/test-volume/ | 312 MiB |      30.5% |
+------------------------------------------------+---------+------------+
2025/01/11 05:28:20.790563 juicefs[225695] <INFO>: 1.0 GiB of 1.0 GiB (100.0%) are cached [warmup.go:337]

[anysql]

#5559

sample output:

check cache file: 1 3.3/s
check cache size: 1.4 MiB (1515800 Bytes) 4.8 MiB/s
Location=/Users/loufangxin/.juicefs/cache/4b2e001e-afab-4b92-b05c-38019de6c105/, size=1.4m, pct=100.0%
2025/01/16 08:25:05.859064 juicefs[14213] : check cache: 1 files checked, 1.4 MiB of 1.4 MiB (100.0%) cached [[email protected]:306]

The output is not well formatted as above