HI,
I wanted to know if someone already looked into the hydrated container Data copies for DR ? ( which offers direct restore from Tape )
Currently i am not sure if this is a good approach or not . I am thinking of doing "some" important Data/Hosts only and keep a Local Tape Copy of the Container ?
my thoughts :
* Restore will be very very slow, because it will need to mount the daily Inc Tape ? ( and 4300 is ... slow in mounting )
* Could a repair of the container from tape + restore some Important Hosts ( number of Tapes - Performance of the Server ? ) work in parallel and is this useful ?
* Container Repair is very slow and if you are in a DR Situation it is a real problem. It does not utilize the theoretical Tape Speed because it is a lot depended on the Server, DB2 and the Block Size used + non dedup small Files .
* If a fast DR is critical, i think the best is to have multi ISP Server's with library sharing, and doing a very small ISP Server for the Data which is needed first. Splitting to multiple Container Pools helps a bit, but the problem is still the size of the DB2 Tables as they are not splitted / partitioned per Container. ( Restore DB , Audit Table )
This is the current local Tape Copy "Performance" as an Example ( CONT_1 = VMWARE TDP Data , CONT_2 = DB dumps ) running on the Customer Site:
ANR4000I The protect storage pool process for CONTAINER_1 on server SERVER1 to TAPE on server SERVER1 is complete. Extents protected: 8329851 of 8329851. Extents failed to protect: 0. Amount protected: 1,301 GB of 1,301 GB. Amount failed to protect: 0 bytes. Extents deleted: 7845627 of 7845627. Extents failed to delete: 0. Extents moved: 0 of 0. Extents failed to move: 0. Amount moved: 0 bytes of 0 bytes. Amount failed to move: 0 bytes. Elapsed time: 0 Days, 1 Hours, 50 Minutes
ANR4000I The protect storage pool process for CONTAINER_2 on server SERVER1 to TAPE on server SERVER1 is complete. Extents protected: 12645224 of 12645224. Extents failed to protect: 0. Amount protected: 2,283 GB of 2,283 GB. Amount failed to protect: 0 bytes. Extents deleted: 8774194 of 8774194. Extents failed to delete: 0. Extents moved: 0 of 0. Extents failed to move: 0. Amount moved: 0 bytes of 0 bytes. Amount failed to move: 0 bytes. Elapsed time: 0 Days, 1 Hours, 29 Minutes
Here u see that it is total depended on the Data how fast/slow everything is ... And this is of course also valid during repair if u need DR.
Admin Schedule Time, Tape Drives (in total 6) on the repl Target are available, but not sure if we should try it out or not .
So if anyone tried it, i would be glad to here from you .
Br, Dietmar
I wanted to know if someone already looked into the hydrated container Data copies for DR ? ( which offers direct restore from Tape )
Currently i am not sure if this is a good approach or not . I am thinking of doing "some" important Data/Hosts only and keep a Local Tape Copy of the Container ?
my thoughts :
* Restore will be very very slow, because it will need to mount the daily Inc Tape ? ( and 4300 is ... slow in mounting )
* Could a repair of the container from tape + restore some Important Hosts ( number of Tapes - Performance of the Server ? ) work in parallel and is this useful ?
* Container Repair is very slow and if you are in a DR Situation it is a real problem. It does not utilize the theoretical Tape Speed because it is a lot depended on the Server, DB2 and the Block Size used + non dedup small Files .
* If a fast DR is critical, i think the best is to have multi ISP Server's with library sharing, and doing a very small ISP Server for the Data which is needed first. Splitting to multiple Container Pools helps a bit, but the problem is still the size of the DB2 Tables as they are not splitted / partitioned per Container. ( Restore DB , Audit Table )
This is the current local Tape Copy "Performance" as an Example ( CONT_1 = VMWARE TDP Data , CONT_2 = DB dumps ) running on the Customer Site:
ANR4000I The protect storage pool process for CONTAINER_1 on server SERVER1 to TAPE on server SERVER1 is complete. Extents protected: 8329851 of 8329851. Extents failed to protect: 0. Amount protected: 1,301 GB of 1,301 GB. Amount failed to protect: 0 bytes. Extents deleted: 7845627 of 7845627. Extents failed to delete: 0. Extents moved: 0 of 0. Extents failed to move: 0. Amount moved: 0 bytes of 0 bytes. Amount failed to move: 0 bytes. Elapsed time: 0 Days, 1 Hours, 50 Minutes
ANR4000I The protect storage pool process for CONTAINER_2 on server SERVER1 to TAPE on server SERVER1 is complete. Extents protected: 12645224 of 12645224. Extents failed to protect: 0. Amount protected: 2,283 GB of 2,283 GB. Amount failed to protect: 0 bytes. Extents deleted: 8774194 of 8774194. Extents failed to delete: 0. Extents moved: 0 of 0. Extents failed to move: 0. Amount moved: 0 bytes of 0 bytes. Amount failed to move: 0 bytes. Elapsed time: 0 Days, 1 Hours, 29 Minutes
Here u see that it is total depended on the Data how fast/slow everything is ... And this is of course also valid during repair if u need DR.
Admin Schedule Time, Tape Drives (in total 6) on the repl Target are available, but not sure if we should try it out or not .
So if anyone tried it, i would be glad to here from you .
Br, Dietmar