Storage information in the Site Status Board
This page explains the information published in the
SSB
via a specialized view called 'storage'.
First of all, a Data Service
query
returning all PhEDEx nodes is used to:
- find all nodes in a site
- the SE for each node
Second, the BDII is queried, and for all Storage Areas in a given PhEDEx site we sum up the following attributes:
-
GlueSATotalOnlineSize
-
GlueSAFreeOnlineSize
-
GlueSAUsedOnlineSize
-
GlueSATotalNearlineSize
-
GlueSAFreeNearlineSize
-
GlueSAUsedNearlineSize
-
InstalledOnlineCapacity
-
InstalledNearlineCapacity
Third, for each site with PhEDEx nodes, we use queries like
https://cmsweb.cern.ch/phedex/datasvc/xml/prod/nodeusage?node=$node
to extract these parameters:
-
cust_node_bytes
-
cust_dest_bytes
-
noncust_dest_bytes
-
noncust_node_bytes
and define
incoming = cust_dest_bytes + noncust_dest_bytes - cust_node_bytes - noncust_node_bytes
custodial = cust_node_bytes
non_custodial = noncust_node_bytes
The following table summarizes all columns in the SSB and describes when a value is marked red (meaning an error condition)
Column name |
Definition |
Red when |
Yellow when |
Custodial (TB) |
PhEDEx custodial data |
|
|
Non-Custodial (TB) |
PhEDEx non-custodial data |
|
|
Incoming (TB) |
Subscribed data not on site |
|
|
Disk pledge (TB) |
Pledged disk resources from SiteDB (TB) |
> 1 year old |
> 1 quarter old |
Installed disk (TB) |
Installed Online capacity from BDII |
< 1 TB or no info |
2 * abs(installed - total) / (installed + total) > 10% |
Total disk (TB) |
Total disk from BDII |
< 1 TB or no info |
abs(total - used - free) > 10% |
Used disk (TB) |
Total used disk from BDII |
< 1 TB or no info |
|
Free disk (TB) |
Total free disk from BDII |
< 1 TB or no info |
|
Tape pledge (TB) |
Pledged tape resources from SiteDB (TB) |
> 1 year old |
> 1 quarter old |
Installed tape (TB) |
Installed Nearline capacity from BDII |
tier-0/1 and < 1 TB or no info |
2 * abs(installed - total) / (installed + total) > 10% |
Total tape (TB) |
Total tape from BDII |
tier-0/1 and < 1 TB or no info |
abs(total - used - free) > 10% |
Used tape (TB) |
Total used tape from BDII |
tier-0/1 and < 1 TB or no info |
|
Free tape (TB) |
Total free tape from BDII |
tier-0/1 and < 1 TB or no info |
|
--
AndreaSciaba - 04-Oct-2011
Topic revision: r3 - 2011-10-04
- unknown