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How to Store-/Restore files via the Admin Interface
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The dCache Book > Configuration of dCache > The dCache Tertiary Storage System Interface > How to Store-/Restore files via the Admin Interface

How to Store-/Restore files via the Admin Interface

In order to see the state of files within a pool, login into the pool in the admin interface and run the command rep ls. 

[example.dcache.org] (<poolname>) admin > rep ls

The output will have the following format: 

PNFSID <MODE-BITS(LOCK-TIME)[OPEN-COUNT]> SIZE si={STORAGE-CLASS}
  • PNFSID: The pnfsID of the file
  • MODE-BITS: 
       CPCScsRDXEL
   |||||||||||
   ||||||||||+--  (L) File is locked (currently in use)
   |||||||||+---  (E) File is in error state
   ||||||||+----  (X) File is pinned (aka "sticky")
   |||||||+-----  (D) File is in process of being destroyed
   ||||||+------  (R) File is in process of being removed
   |||||+-------  (s) File sends data to back end store
   ||||+--------  (c) File sends data to client (dCap,FTP...)
   |||+---------  (S) File receives data from back end store
   ||+----------  (C) File receives data from client (dCap,FTP)
   |+-----------  (P) File is precious, i.e., it is only on disk
   +------------  (C) File is on tape and only cached on disk.
  • LOCK-TIME: The number of milli-seconds this file will still be locked. Please note that this is an internal lock and not the pin-time (SRM).
  • OPEN-COUNT: Number of clients currently reading this file.
  • SIZE: File size
  • STORAGE-CLASS: The storage class of this file.

Example:

[example.dcache.org] (pool_1) admin > rep ls
00008F276A952099472FAD619548F47EF972 <-P---------L(0)[0]> 291910 si={dteam:STATIC}
00002A9282C2D7A147C68A327208173B81A6 <-P---------L(0)[0]> 2011264 si={dteam:STATIC}
0000EE298D5BF6BB4867968B88AE16BA86B0 <C----------L(0)[0]> 1976 si={dteam:STATIC}

In order to flush a file to the tape run the command flush pnfsid. 

[example.dcache.org] (<poolname>) admin > flush pnfsid <pnfsid>

Example:

[example.dcache.org] (pool_1) admin > flush pnfsid 00002A9282C2D7A147C68A327208173B81A6
Flush Initiated

A file that has been flushed to tape gets the flag ’C’.

Example:

[example.dcache.org] (pool_1) admin > rep ls
00008F276A952099472FAD619548F47EF972 <-P---------L(0)[0]> 291910 si={dteam:STATIC}
00002A9282C2D7A147C68A327208173B81A6 <C----------L(0)[0]> 2011264 si={dteam:STATIC}
0000EE298D5BF6BB4867968B88AE16BA86B0 <C----------L(0)[0]> 1976 si={dteam:STATIC}

To remove such a file from the repository run the command rep rm. 

[example.dcache.org] (<poolname>) admin > rep rm <pnfsid>

Example:

[example.dcache.org] (pool_1) admin > rep rm  00002A9282C2D7A147C68A327208173B81A6
Removed 00002A9282C2D7A147C68A327208173B81A6

In this case the file will be restored when requested.

To restore a file from the tape you can simply request it by initializing a reading transfer or you can fetch it by running the command rh restore. 

[example.dcache.org] (<poolname>) admin > rh restore [-block] <pnfsid>

Example:

[example.dcache.org] (pool_1) admin > rh restore 00002A9282C2D7A147C68A327208173B81A6
Fetch request queued
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