some questions in dev-seesion 9

[httaotao]

hi, thanks for making dev-session. these day, I saw the video dev-session 9, there are some questions I am not sure.

1. For directory xattorp, if some files are created at the beginning and then deleted, the file information will still be preserved, although this information will not be used.
   Here are the steps to reproduce the problem:
   1). create a volume and mount
   2). kill one of the brick pid
   3). touch some files and make some directories
   4). delete the files and directories what you made before.
   5). use command tree to check path .glusterfs/indices info
   here you can find that the info about files and directories you made before were exists.

I don't know if the files were deleted , why do the info in xattrop still exists.

2. In video, you mentioned some info about index and posix

     index  ---
        |
     posix  ---

you said for each posix request ,firstly it will make the index info in .glusterfs/indices to make sure that don't miss any requests, right ?
In this part, I didn't listen carefully about it beacuse my english is not good . Could you summary the info about it ?

3. In indices, if you make or touch something, and heal the file ,there are some file still exist all the time.

1.root@gfs02:~# tree  /glusterfs/test-index/.glusterfs/indices/  
2./glusterfs/test-index/.glusterfs/indices/  
3.├── dirty  
4.│   └── dirty-db686567-3b6f-4391-b7e7-3d0c1b20fe7b  
5.├── entry-changes  
6.│   └── entry-changes-db686567-3b6f-4391-b7e7-3d0c1b20fe7b  
7.└── xattrop  
8.    └── xattrop-db686567-3b6f-4391-b7e7-3d0c1b20fe7b  
9.  
3 directories, 3 files

I don't know what the purpose of these documents is and their names will not change.

thanks .

[pranithk]

hi, thanks for making dev-session. these day, I saw the video dev-session 9, there are some questions I am not sure.

1. For directory xattorp, if some files are created at the beginning and then deleted, the file information will still be preserved, although this information will not be used.
   Here are the steps to reproduce the problem:
   1). create a volume and mount
   2). kill one of the brick pid
   3). touch some files and make some directories
   4). delete the files and directories what you made before.
   5). use command tree to check path .glusterfs/indices info
   here you can find that the info about files and directories you made before were exists.

I don't know if the files were deleted , why do the info in xattrop still exists.

I think the indices are deleted on the next crawl by shd whenever that happens.

1. In video, you mentioned some info about index and posix

     index  ---
        |
     posix  ---

you said for each posix request ,firstly it will make the index info in .glusterfs/indices to make sure that don't miss any requests, right ?
In this part, I didn't listen carefully about it beacuse my english is not good . Could you summary the info about it ?

There should be no situation where a modification on posix xlator is done but the index for that gfid is not present. To achieve this, index is added first before a pre-operation is done on the inode and deleted after the post-operation is complete.

1. In indices, if you make or touch something, and heal the file ,there are some file still exist all the time.

1.root@gfs02:~# tree  /glusterfs/test-index/.glusterfs/indices/  
2./glusterfs/test-index/.glusterfs/indices/  
3.├── dirty  
4.│   └── dirty-db686567-3b6f-4391-b7e7-3d0c1b20fe7b  
5.├── entry-changes  
6.│   └── entry-changes-db686567-3b6f-4391-b7e7-3d0c1b20fe7b  
7.└── xattrop  
8.    └── xattrop-db686567-3b6f-4391-b7e7-3d0c1b20fe7b  
9.  
3 directories, 3 files

I don't know what the purpose of these documents is and their names will not change.

These are the base index files other gfid-strings link to. So they will always be present for use by index xlator.

thanks .