Difference between revisions of "Description and scope of the service"

Revision as of 19:44, 30 May 2016

**BWDA Storage Classes**
Name	Max avg. access time	Storage Location	# of copies	physical separation	comment
Class 0	<10 seconds	disk only	1	na	high available RAID6/E2EDI
Class 1 - Standard	<10 minutes	disk cache in front of tape	1	na	disk buffer cache in front of tape large enough to hold a working set of the data to guarantee access times
Class 2 - Premium	<10 hours	tape only	2	2 locations	regular archive storage comparable to azure, aws
Class 3 - Premium Plus	<10 hours	tape only	3	2 locations	super safe storage. targeting 20 nines. Third location outside computer centre.

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 {| class="wikitable" style="background:#EEEEAA;"
 |+ '''BWDA Storage Classes'''
-! width="50"|Name !! width="100"|Max avg. access time !! Storage Location !! width="50"| # of copies !! width="75"|physical separation !! comment
+! width="150"|Name !! width="100"|Max avg. access time !! Storage Location !! width="50"| # of copies !! width="75"|physical separation !! comment
 |-
-||Class 1||<10 seconds||disk only||1||na||high available RAID6/E2EDI
+||Class 0||<10 seconds||disk only||1||na||high available RAID6/E2EDI
 |-
-||Class 2||<10 minutes||disk cache in front of tape||1||na||disk buffer cache in front of tape large enough to hold a working set of the data to guarantee access times
+||Class 1 - Standard||<10 minutes||disk cache in front of tape||1||na||disk buffer cache in front of tape large enough to hold a working set of the data to guarantee access times
 |-
-||Class 3||<10 hours||tape only||2||2 locations||regular archive storage comparable to azure, aws
+||Class 2 - Premium||<10 hours||tape only||2||2 locations||regular archive storage comparable to azure, aws
 |-
-||Class 4||<10 hours||tape only||2||2 locations||super safe storage. targeting 20 nines. Second location with different technology
+||Class 3 - Premium Plus||<10 hours||tape only||3||2 locations||super safe storage. targeting 20 nines. Third location outside computer centre.
 |-
 |}