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3545
Centera Object Count Question
Hi All,
I have a Centera and while capacity planning to project when we may run out of available objects, I have confused myself. When I look at the "show pool capacity" output I see the following:
Here I see that the pools have used 88 Million total C-Clips and 87.5 Million files.
But when examining the "show objects detail storage" output:
Config# show objects detail storage
Node Roles Status Total Used Supp Free
---------------------------------------------------------------
c001n01 A,M,R,S on 50 M 4 M 50 M 46 M
c001n02 A,M,R,S on 50 M 5 M 50 M 45 M
c001n03 A,M,R,S on 50 M 5 M 50 M 46 M
c001n04 A,M,R,S on 50 M 5 M 50 M 46 M
c001n05 S on 50 M 4 M 50 M 46 M
c001n06 S on 50 M 4 M 50 M 46 M
c001n07 S on 50 M 4 M 50 M 46 M
c001n08 S on 50 M 4 M 50 M 46 M
c001n09 S on 50 M 5 M 50 M 46 M
c001n10 S on 50 M 4 M 50 M 46 M
c001n11 S on 50 M 4 M 50 M 46 M
c001n12 S on 50 M 4 M 50 M 46 M
c001n13 S on 50 M 4 M 50 M 46 M
c001n14 S on 50 M 4 M 50 M 46 M
c001n15 S on 50 M 4 M 50 M 46 M
c001n16 S on 50 M 4 M 50 M 46 M
c002n01 A,M,R,S on 50 M 4 M 50 M 46 M
c002n02 A,M,R,S on 50 M 4 M 50 M 46 M
c002n03 A,M,R,S on 50 M 4 M 50 M 46 M
c002n04 A,M,R,S on 50 M 4 M 50 M 46 M
c002n05 S on 50 M 4 M 50 M 46 M
c002n06 S on 50 M 4 M 50 M 46 M
c002n07 S on 50 M 6 M 50 M 45 M
c002n08 S on 50 M 4 M 50 M 46 M
c002n09 S on 50 M 4 M 50 M 47 M
c002n10 S on 50 M 4 M 50 M 46 M
c002n11 S on 50 M 4 M 50 M 47 M
c002n12 S on 50 M 4 M 50 M 46 M
c002n13 S on 50 M 4 M 50 M 46 M
c002n14 S on 50 M 4 M 50 M 46 M
c002n15 S on 50 M 4 M 50 M 46 M
c002n16 S on 50 M 4 M 50 M 46 M
c003n01 S on 50 M 5 M 50 M 46 M
c003n02 S on 50 M 5 M 50 M 45 M
c003n03 S on 50 M 5 M 50 M 45 M
c003n04 S on 50 M 5 M 50 M 45 M
c003n05 S on 50 M 4 M 50 M 46 M
c003n06 S on 50 M 5 M 50 M 46 M
c003n07 S on 50 M 5 M 50 M 45 M
c003n08 S on 50 M 4 M 50 M 46 M
c003n09 S on 50 M 6 M 50 M 45 M
c003n10 S on 50 M 5 M 50 M 45 M
c003n11 S on 50 M 6 M 50 M 44 M
c003n12 S on 50 M 5 M 50 M 46 M
c003n13 S on 50 M 8 M 50 M 42 M
c003n14 S on 50 M 9 M 50 M 41 M
c003n15 S on 50 M 8 M 50 M 42 M
c003n16 S on 50 M 9 M 50 M 41 M
c004n01 S on 50 M 9 M 50 M 41 M
c004n02 S on 50 M 9 M 50 M 41 M
c004n03 S on 50 M 9 M 50 M 41 M
c004n04 S on 50 M 9 M 50 M 41 M
---------------------------------------------------------------
Total (online nodes: 52) 2,609 M 265 M 2,609 M 2,345 M
Roles: A(ccess), M(anagement), R(eplication), S(torage)
srbhandary
27 Posts
0
December 10th, 2010 08:00
Hello Nathan,
The difference of counts you notice with C-Clips and object counts is because Centera uses single instance storage and a c-clip can contain pointers to multiple blobs (objects) .
And the number of files the centera can store depends on the object count. As long as the object count threshold is not crossed (50M / node and configurable to 100M with assistance from EMC tech support) , you can keep storing files.
To understand the storage technology in Centera, see the EMC Centera Capacity Reporting for Gen4LP on CentrStar 4.0 guide on Powerlink. The document that has illustrations and examples.
You can find this White Paper on Powerlink at one of these locations:
Home > Products > Hardware/Platforms > Centera > White Papers
Home > Support > Technical Documentation and Advisories > White Papers > All White Papers