All DD's must have an active tier with shelf licenses for active tier use.
Archive tier is to 'move' data from the active tier to the archive tier by policy (like aging policy), essentially it gives you an alternative option than moving DDR data to physical tape to reduce your stored capacity on the DD.
Now really called "extended retention" - though it's still called the archive tier inside the DDR.
You will basically have 2 filesystems, active and archive.
They will independently dedupe from one another - they will not share commonality of data stored in each.
Archive tier shelves are cheaper to purchase than active tier shelves and will allow your DDR to store more data (connect more shelves), assuming your model type is ER capable.
To use it, you will need an extended retention feature license, enough system memory and the shelves with archive tier licenses.
I assume you may have noticed the price difference for the shelves but archive tier can only sit behind an active tier.
Your archive tier cannot exceed the capacity of the active tier. The "archive" tier shelves can physically be connected on a loop with other "active" tier shelves.
Are you using archiving function within DD? If yes, archive tier applies to volumes/disks used by that function. Everything else is primary tier. I'm not sure, but I assume you would not have same disks for archive tier, but I could be wrong (I don't use it).
Only archive tier would make sense only if that DD is used as archiving target only for existing DD which is running active tier. Not sure if such setup is even possible with current archiving option so I'm afraid the answer is most likely no.
You mean the active tier cannot be bigger than the archive tier surly?
"Your archive tier cannot exceed the capacity of the active tier. The "archive" tier shelves can physically be connected on a loop with other "active" tier shelves."
I see why not... I can have 100TB active tier and 50TB archive tier as I choose not to archive all data that I would place on otherwise on active tier. At least that would be the logic I would follow.
jbrooksuk
208 Posts
0
January 22nd, 2015 06:00
All DD's must have an active tier with shelf licenses for active tier use.
Archive tier is to 'move' data from the active tier to the archive tier by policy (like aging policy), essentially it gives you an alternative option than moving DDR data to physical tape to reduce your stored capacity on the DD.
Now really called "extended retention" - though it's still called the archive tier inside the DDR.
You will basically have 2 filesystems, active and archive.
They will independently dedupe from one another - they will not share commonality of data stored in each.
Archive tier shelves are cheaper to purchase than active tier shelves and will allow your DDR to store more data (connect more shelves), assuming your model type is ER capable.
To use it, you will need an extended retention feature license, enough system memory and the shelves with archive tier licenses.
I assume you may have noticed the price difference for the shelves but archive tier can only sit behind an active tier.
Your archive tier cannot exceed the capacity of the active tier. The "archive" tier shelves can physically be connected on a loop with other "active" tier shelves.
HTH,
Jonathan
ble1
4 Operator
•
14.4K Posts
1
January 21st, 2015 11:00
Are you using archiving function within DD? If yes, archive tier applies to volumes/disks used by that function. Everything else is primary tier. I'm not sure, but I assume you would not have same disks for archive tier, but I could be wrong (I don't use it).
boerbokrib
1 Rookie
•
124 Posts
0
January 22nd, 2015 05:00
Hi
So you have to have an active tier? You cannot just have an archive tier?
ble1
4 Operator
•
14.4K Posts
1
January 22nd, 2015 05:00
Only archive tier would make sense only if that DD is used as archiving target only for existing DD which is running active tier. Not sure if such setup is even possible with current archiving option so I'm afraid the answer is most likely no.
boerbokrib
1 Rookie
•
124 Posts
0
January 22nd, 2015 22:00
Hi
You mean the active tier cannot be bigger than the archive tier surly?
"Your archive tier cannot exceed the capacity of the active tier. The "archive" tier shelves can physically be connected on a loop with other "active" tier shelves."
ble1
4 Operator
•
14.4K Posts
2
January 23rd, 2015 01:00
I see why not... I can have 100TB active tier and 50TB archive tier as I choose not to archive all data that I would place on otherwise on active tier. At least that would be the logic I would follow.