Re: cephfs(Kraken 11.2.1), Unable to write more file when one dir more than 100000 files, mds_bal_fragment_size_max = 5000000

["donglifecomm@xxxxxxxxx" <donglifecomm@xxxxxxxxx>]

ZhengYan,

I'm sorry, just a description of some questions.

when one dir more than 100000 files, I can continue to write it , but I don't find file which wrote in the past. for example:

1.  I write  100000 files named 512k.file$i

       

2. I continue to write  10000 files named aaa.file$i

3. I continue to write  10000 files named bbb.file$i

4.  I continue to write  10000 files named ccc.file$i

5. I continue to write  10000 files named ddd.file$i

6. I can't find all ddd.file$i, some ddd.file$i missing. such as:

[root@yj43959-ceph-dev scripts]# find /mnt/cephfs/volumes -type f  |  grep 512k.file | wc -l
100000
[root@yj43959-ceph-dev scripts]# ls /mnt/cephfs/volumes/aaa.file* | wc -l
10000
[root@yj43959-ceph-dev scripts]# ls /mnt/cephfs/volumes/bbb.file* | wc -l
10000
[root@yj43959-ceph-dev scripts]# ls /mnt/cephfs/volumes/ccc.file* | wc -l
10000
[root@yj43959-ceph-dev scripts]# ls /mnt/cephfs/volumes/ddd.file* | wc -l    // some files missing
1072

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donglifecomm@xxxxxxxxx

 

From: donglifecomm@xxxxxxxxx

Date: 2017-09-08 13:30

To: zyan

CC: ceph-users

Subject: cephfs(Kraken 11.2.1), Unable to write more file when one dir more than 100000 files, mds_bal_fragment_size_max = 5000000

ZhengYan,

I test cephfs(Kraken 11.2.1),  I can't write more files when one dir more than 100000 files, I have already set up "mds_bal_fragment_size_max = 5000000".

why is this case? Is it a bug?

Thanks a lot.

---

donglifecomm@xxxxxxxxx

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